TCP not working on certain PC's/Browsers

Question

TCP not working on certain PC's/Browsers

Chris P 20

Hello,

I have a program that connects to a service that is run through a Computer that is running an SQL Database (as a server). This Server PC connects to the Service over the internet.

The program on the client PC's connect to the server through TCP port 8080 to load up the service.

The program connects like this:

server-name:5088/forms-directory/authtokenblahblahblah.

Whats strange is, Microsoft Edge and Chrome get error:

User's image

If I copy and paste the URL into Firefox or Edge with IE Mode, it loads fine.

Only 3 of the 9 computers has this issue. I can netstat -ano on the working computers and see 8080 being connected, but even if I load the url in Firefox on affected PC's, the netstat -ano still doesn't show port 8080 established, so I have no idea how Firefox is loading the page.

Firewalls have been disabled, port forwarding has been done, reinstall programs, nothing seems to help.

Does anyone have an idea on what the hell is going on, what could have changed the behaviour to 3 of the client PC's and/or any advice on what to look for/into to find what could make this happen?

Update:

Moto made a comment to clarify. So I shall do my best to make sense of it.

The business has 9 Standard PC's, no Server Hardware.

There is a NUC PC that "acts" as the server (We will call it Server PC) to a program that uses SQL Database as its core.

In this program, there is an "extension" or "add-on" if you will, that connects to an external service to refer people to other services, then puts the information into the customers information.

The other 8 PC's have a "client" version of the program, and connect to the PC that acts as the server.

There is a button that basically runs a Browser Window, which utilises the Edge Browser (technically it supposed to use any browser that is set to default in the Windows Settings, but doesn't).

This Window shows up a URL that is mentioned above. They call it the "Launch URL". And to have the client PC connect to this service via the Server PC, it connects through port 8080.

For the URL to say port 5088, I would say it is because the "add-on" has the program connect to its thing through that port? Possibly because you might be able to host the service somewhere else, or it has to use that port for external.

Regardless, the communication broken is through port 8080 to the Server PC.

Anti-Virus/Firewall Software have been disabled, despite being the same on the working devices, but does not resolve the issue.

Port Forwarding has been put on the router to try and have the port function, however clearly not needed since only 3 PC's are affected.

Uninstalling Edge forced the Program to use IE, which isn't a recommended solution by the Support team of the program (They are looking into this, but are too struggling with why this has happened, so I am getting external input).

To really hit hard, essentially all computers are pretty much set up and maintained the same, and makes this harder because if someone using the computer has done something, the likely chance is that most of the computers would get this issue, however that point is easily moot, coz it could be anything.

I did what Moto said and did PowerShell test and it says TCPTestSucceeded: True

As mentioned, only Edge and Chrome won't load the URL, and get the error above. Paste the URL into Firefox or use IE Mode on Edge, it works, and it even puts the referral into the program with no issues.

Reza-Ameri 17,341 Reputation points Volunteer Moderator

2023-10-29T19:38:52.8433333+00:00

Have you tried loading the page in InPrivate browsing mode?

Do you have any add-ons or extensions on your browser?
Chris P 20 Reputation points

2023-10-29T20:51:20.5866667+00:00

Thanks for the reply Reza. Incognito Mode still has issues and no extensions.
Reza-Ameri 17,341 Reputation points Volunteer Moderator

2023-10-30T19:48:31.5733333+00:00

Have you tried cleaning DNS cache and release and renew IP?
Chris P 20 Reputation points

2023-10-30T20:58:47.39+00:00

Have you tried cleaning DNS cache and release and renew IP?

Indeed, release, renew, DNS Flush, Winsock.

Accepted answer

2 additional answers

Your answer

Reza-Ameri 17,341 Reputation points Volunteer Moderator

2023-10-29T19:38:52.8433333+00:00

Have you tried loading the page in InPrivate browsing mode?

Do you have any add-ons or extensions on your browser?
Chris P 20 Reputation points

2023-10-29T20:51:20.5866667+00:00

Thanks for the reply Reza. Incognito Mode still has issues and no extensions.
Reza-Ameri 17,341 Reputation points Volunteer Moderator

2023-10-30T19:48:31.5733333+00:00

Have you tried cleaning DNS cache and release and renew IP?
Chris P 20 Reputation points

2023-10-30T20:58:47.39+00:00

Have you tried cleaning DNS cache and release and renew IP?

Indeed, release, renew, DNS Flush, Winsock.

Answer 1

MotoX80 36,291

I found the trace. edge://net-export/

I started the trace, tried to browse http://zzzzzz, and then saved the log file. I used the netlog_viewer link to browse the file.

This is the events link. I see it calling Google for name lookup. Zzzzz doesn't exist.

User's image

This is the DNS link.

User's image

I'm not sure what to tell you to look for. Somewhere in there it should try to resolve the server name to an IP address. See what it does after that. Do you see 192.168.13.2 referenced anywhere?

See: https://ghacks.net/2020/02/20/an-overview-of-all-internal-microsoft-edge-urls/

Chris P 20

This is what I get: (DNS Section shows nothing related)

User's image

6489: TRANSPORT_CONNECT_JOB 
http://bsm-server:5088 <http://bsm-server same_site> 
Start Time: 2023-11-09 10:00:16.665  
t=37427 [st=    0] +CONNECT_JOB  [dt=11483+]
t=37427 [st=    0]    SOCKET_POOL_CONNECT_JOB_CREATED                       --> backup_job = false                       --> group_id = "http://bsm-server:5088 <http://bsm-server same_site>" t=37427 [st=    0]   +TRANSPORT_CONNECT_JOB_CONNECT  [dt=11483+] t=37427 [st=    0]     +HOST_RESOLVER_MANAGER_REQUEST  [dt=1]                         --> allow_cached_response = true                         --> dns_query_type = "UNSPECIFIED"                         --> host = "http://bsm-server:5088"                         --> is_speculative = false                         --> network_anonymization_key = "http://bsm-server same_site"                         --> secure_dns_policy = 0 t=37428 [st=    1]        HOST_RESOLVER_MANAGER_IPV6_REACHABILITY_CHECK                           --> cached = false                           --> ipv6_available = false t=37428 [st=    1]        HOST_RESOLVER_MANAGER_HOSTS_HIT                           --> results = {                                 "aliases": [],                                 "canonical_names": [],                                 "endpoint_metadatas": [],                                 "expiration": "13343663866295458",                                 "host_ports": [],                                 "hostname_results": [],                                 "ip_endpoints": [                                   {                                     "endpoint_address": "192.168.13.2",                                     "endpoint_port": 0                                   }                                 ],                                 "name_resolution_handle": 0,                                 "text_records": []                               } t=37428 [st=    1]     -HOST_RESOLVER_MANAGER_REQUEST t=37428 [st=    1]      TRANSPORT_CONNECT_JOB_CONNECT_ATTEMPT                         --> address = "192.168.13.2:5088"                         --> source_dependency = 6492 (SOCKET) t=48910 [st=11483]

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MotoX80 36,291 Reputation points

2023-11-09T00:25:41.3766667+00:00

Can you upload that file somewhere that I could download it and look at all entries?
MotoX80 36,291 Reputation points

2023-11-09T13:06:34.2633333+00:00
It has to be your router that is doing this. Nothing else makes sense to me. Open a command prompt and run this. What do you get?

nslookup bsm-server 192.168.1.1

Can you log into the router's web interface and check all of its DNS settings. There has to be something there.
Chris P 20 Reputation points

2023-11-09T22:19:04.5133333+00:00

Hey,

I get this:

The Router has no abnormal settings, all is pretty standard and has not been changed.

The Router is a simple Netgear D6400, so it has no real advanced features to do detailed stuff like this.

I also tried do nslookup for the IP Address it is on, which is 192.168.1.100, same error.

Also I cant see my comment about ping, so I will mention:

when I ping 192.168.13.2, it comes up with 10.20.25.178

Also waiting on new equipment to arrive so that the whole Comms Rack can be organized and add new devices properly, so when that occurs, I will be doing isolation tests and I will look at factory reset of Netgear and such, see if anything changes - unless the issue is found.

MotoX80 36,291

Has someone been playing around with the network? Any VPN's enabled?

What does "route print" and tracert show?

This is from a VM (192.168.1.2). It's showing that everything is going to my 192.168.1.1 gateway. Tracert goes to the gateway, then to my ISP, and then the bit bucket.

C:\>route print
===========================================================================
Interface List
 12...00 0c 29 da c7 a5 ......Intel(R) 82574L Gigabit Network Connection
  1...........................Software Loopback Interface 1
===========================================================================

IPv4 Route Table
===========================================================================
Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
          0.0.0.0          0.0.0.0      192.168.1.1      192.168.1.2      2
        127.0.0.0        255.0.0.0         On-link         127.0.0.1    331
        127.0.0.1  255.255.255.255         On-link         127.0.0.1    331
  127.255.255.255  255.255.255.255         On-link         127.0.0.1    331
      192.168.1.0    255.255.255.0         On-link       192.168.1.2    257
      192.168.1.2  255.255.255.255         On-link       192.168.1.2    257
    192.168.1.255  255.255.255.255         On-link       192.168.1.2    257
        224.0.0.0        240.0.0.0         On-link         127.0.0.1    331
        224.0.0.0        240.0.0.0         On-link       192.168.1.2    257
  255.255.255.255  255.255.255.255         On-link         127.0.0.1    331
  255.255.255.255  255.255.255.255         On-link       192.168.1.2    257
===========================================================================
Persistent Routes:
  None

PS C:\> tracert 192.168.13.2

Tracing route to 192.168.13.2 over a maximum of 30 hops

  1    42 ms    16 ms    17 ms  Wireless_Broadband_Router.home [192.168.1.1]
  2     6 ms     8 ms     6 ms  lo0-100.HRBGPA-VFTTP-302.verizon-gni.net [108.55.114.1]
  3     *        *        *     Request timed out.
  4     *        *        *     Request timed out.
  5     *        *        *     Request timed out.

Is that .json file small enough that you could rename it to a .txt file and upload it here? Curiosity more than anything.

I'm running out of ideas.

Chris P 20 Reputation points

2023-11-09T23:25:37.34+00:00

Nobody plays with the network, no VPN's, it is unlikely a malicious attack, and it affects only 3 computers, not all 9.

Route Print gets this, including what appears to be IPv6, which is disabled?

Tracert I get this:

Here is the file:

edge-net-export-log.txt
MotoX80 36,291 Reputation points

2023-11-09T23:51:57.18+00:00

Thanks, I'll see if I can find anything.
MotoX80 36,291 Reputation points

2023-11-10T01:09:38.2333333+00:00

I'm sorry, I can't figure out where that IP address is coming from.
Chris P 20 Reputation points

2023-11-10T03:43:48.5666667+00:00

All good mate, you have been very helpful in troubleshooting.

Thanks for your time and efforts. I hope that the isolation work will add some insight. If worse comes to worse, I am refreshing Windows on at least 2 of the machines.
MotoX80 36,291 Reputation points

2023-11-10T13:30:28.3766667+00:00
Before you rebuild pc's I would suggest is that you fix your router to register local DNS entries. Nslookup bsm-server should return the ip address. And an nslookup on the ip address should return the name.

There has to be some setting that allows that to happen.

That's how my router works.

Refer to that other post.

https://learn.microsoft.com/en-us/answers/questions/302088/how-to-switch-from-a-call-by-ip-address-to-a-call?page=3#answers

That user said that he got it working but I don't see how. See my last reply on page 3.

You could always set bsm-server to use a fixed IP address and add a hosts file entry on all of your pc's. But I don't like that solution.

https://www.thewindowsclub.com/hosts-file-in-windows

Did you check your hosts file? I didn't ask that before because it should have applied to all processes and not just Edge.

type c:\windows\system32\drivers\etc\hosts
Chris P 20 Reputation points

2023-11-10T23:05:24.84+00:00

ITS THE DAMN HOST FILE!

All the broken PC's had that list for what could be a reason that I need to verify, but strange that it happened to activate now.

There was going to be a 4G Backup Modem activated that does failover, and it uses 192.168.15.1.

It could have been that because it wasn't working properly. But I need to verify. This was back in 2020.

Otherwise it was something else.
Chris P 20 Reputation points

2023-11-11T00:18:39.4033333+00:00

BRO! It's back to normal!

You are the bomb!

I found out that the previous ISP was Telstra and forgot their Modem/Router used 192.168.15.1

So this was a Host File thing from those days, but I have no notes as to why they had these entries.

I also don't know why it never took affect until the end of September, when the ISP change was back in 2019.
MotoX80 36,291 Reputation points

2023-11-11T00:31:50.49+00:00

No s..... Go find Bruce and slap him upside his head.

How is Firefox working then? That's what threw me. It should have used the hosts file too.
Chris P 20 Reputation points

2023-11-11T00:35:38.5966667+00:00

Bruce is dead... Named after Bruce Lee lolz

Thats what I was thinking! and I don't understand why those computers had it, when it would have been all of them?

And yes, why wasn't Firefox affected!?

This blew my mind when I did the CMD then went into the file. Bonkers!
MotoX80 36,291 Reputation points

2023-11-11T01:09:15.8566667+00:00

I'm psssd that I didn't suggest checking the hosts file right from the start. Oh well.
Chris P 20 Reputation points

2023-11-11T01:25:51.1+00:00

All good mate. I learnt a lesson from this. Maybe its best to consider troubleshooting things you shortcut/believe shouldn't be it sometimes. I too ignored it coz it would have affected a lot more than very specific things... Well... That's what I assumed anyways.

Thanks again, you thought outside the box, you are a champ!

Answer 2

MotoX80 36,291

Your question references both port 8080 and port 5088. And it is not clear if "a Computer running SQL" and a "Server PC" are the same machine or not. You might want to clarify your environment.

If you are doing port forwarding over the internet, then I would suggest you start with logging on to that machine and verify that PC's on the internet can connect to the exposed port. (8080?) You can use this site to do that.

https://canyouseeme.org/

On a client machine open a Powershell prompt and test connectivity.

Test-NetConnection -ComputerName server-name -port 8080

If it can't connect then you have a firewall or port forwarding issue.

Then see if PS can hit the site.

Invoke-WebRequest Http://server-name:5088/forms-directory/blahblahblah.htm       # 8080??

If you get back a 401 or 404 error, then that's good. You can connect to the site. What do you have listening on 8080/5088? IIS? Apache? Tomcat? You should see an entry for blahblahblah.htm in the log files.

Then try a "real" request. If you get a timeout, you can add the -TimeoutSec switch to increase the time. You should see those requests in the IIS/Apache/Tomcat log files. If it still times out, then you must have some kind of application problem.

Chris P 20 Reputation points

2023-10-30T00:14:23.17+00:00

Thanks for the reply Moto,

I updated the Post, but here is what I wrote:

The business has 9 Standard PC's, no Server Hardware.

There is a NUC PC that "acts" as the server (We will call it Server PC) to a program that uses SQL Database as its core.

In this program, there is an "extension" or "add-on" if you will, that connects to an external service to refer people to other services, then puts the information into the customers information.

The other 8 PC's have a "client" version of the program, and connect to the PC that acts as the server.

There is a button that basically runs a Browser Window, which utilises the Edge Browser (technically it supposed to use any browser that is set to default in the Windows Settings, but doesn't).

This Window shows up a URL that is mentioned above. They call it the "Launch URL". And to have the client PC connect to this service via the Server PC, it connects through port 8080.

For the URL to say port 5088, I would say it is because the "add-on" has the program connect to its thing through that port? Possibly because you might be able to host the service somewhere else, or it has to use that port for external.

Regardless, the communication broken is through port 8080 to the Server PC.

Anti-Virus/Firewall Software have been disabled, despite being the same on the working devices, but does not resolve the issue.

Port Forwarding has been put on the router to try and have the port function, however clearly not needed since only 3 PC's are affected.

Uninstalling Edge forced the Program to use IE, which isn't a recommended solution by the Support team of the program (They are looking into this, but are too struggling with why this has happened, so I am getting external input).

To really hit hard, essentially all computers are pretty much set up and maintained the same, and makes this harder because if someone using the computer has done something, the likely chance is that most of the computers would get this issue, however that point is easily moot, coz it could be anything.

I did what Moto said and did PowerShell test and it says TCPTestSucceeded: True

As mentioned, only Edge and Chrome won't load the URL, and get the error above. Paste the URL into Firefox or use IE Mode on Edge, it works, and it even puts the referral into the program with no issues.

I tried the Invoke Request, but PS doesn't like the URL strings.

I don't have access to what's behind in an advanced way, so I could not tell you what it is listening to. All I know is the Client PC's connect to the Server PC that runs the program as the Server by connecting this referral service through port 8080, then it spits out the URL on the programs built-in browser that frames Microsoft Edge, with the http connection to the server name on port 5088, which I do not know what that port is doing or how it relates.
MotoX80 36,291 Reputation points

2023-10-30T00:57:43.3533333+00:00

You need to work with the software vendor's support team on this one.
Chris P 20 Reputation points

2023-10-30T01:11:01.8333333+00:00

So you reckon its a bug on the program? That would make sense, its odd that 3 computers that are practically the same would suddenly have this issue.

They are struggling to figure it out, and seem to want to externally blame, so I thought I would make this post to see if anybody has any ideas on what to look at, check, or a possible reason.

Thanks for your responses.
MotoX80 36,291 Reputation points

2023-10-30T02:09:19.7133333+00:00

I don't know what the problem might be. You kinda have to be a murder detective and follow the evidence to find out "who dunnit". So you know that you have an issue connecting to port 8080. Ok, what process is that? IIS, Apache, Tomcat? Start with a log analysis. Do you see any errors? Do you even know where the logs are? What about performance issues? Is it out of memory? Are requests hanging? Are requests making a call to SQL, but SQL is not responding. You need to understand how this app works at a low level to troubleshoot it. Forum users have zero knowledge of this app. If you don't know what process hosts port 8080, then you don't know a lot more than we do. That's nothing against you, that's why you get vendor support because they should understand how to troubleshoot their app.

Standard questions: did this problem just start? Was everything working ok up until some software update was applied or someone was changing some settings? ;Reboot all involved servers and see if the problem goes away.
MotoX80 36,291 Reputation points

2023-10-30T14:56:33.35+00:00

Are all of these PC's on the same network subnet?

If they are, then you don't need any port forwarding rules on your router. That only enables pc's out on the internet to access your internal server. If you don't need that access, then you should remove that forwarding rule because it exposes your internal pc to every hacker out there.

I did what Moto said and did PowerShell test and it says TCPTestSucceeded: True As mentioned, only Edge and Chrome won't load the URL, and get the error above.

Using Edge, navigate to an empty page with "about:blank". Then press F12 and select the Network tab.

Then browse just the server name and port. Http://servername:8080 and https://servername:8080

Do either connect? Do either get a response from the server?

Then try the full web address.

I was able to recreate the error that you got by setting up an IIS site for port 8080 and HTTPS.

But I was trying to browse with an HTTP url.

When I try HTTPS, then Edge complains about the certificate, which is expected.
Chris P 20 Reputation points

2023-10-30T21:24:43.8566667+00:00

If you don't know what process hosts port 8080, then you don't know a lot more than we do

Thats fair. I only did this because they have a tone of "it must not be the app" and that tone is slowly drifting toward "it's your problem" and leave it.

Standard questions: did this problem just start? Was everything working ok up until some software update was applied or someone was changing some settings? ;Reboot all involved servers and see if the problem goes away.

We have been working on it since end of September >_< Its taking this long to figure it out.

It was working just fine, then one of the staff came in to work, had to refer someone, clicked the button, doesn't load the webpage, just the error in the post. They are currently doing the Firefox copy and paste method when using a computer that has this issue.

No Software Updates or settings changed, they are maintained properly, to a point that if an update or change did this, it would have affected all PC's. Even if it was considered a random user change of something, or did something random somewhere, it becomes a super low chance because of who and how the computers are used, and what computers are affected, the odds that multiple people did the exact same thing is unlikely.

Have rebooted all the PC's, flushed DNS, released and renewed IP, reset WinSock, changed the Program to use port 8081 for example, where all working computers complied, but not the 3 affected ones unless pasting into Firefox still, with netstat - ano not showing the established connection if it loads on FF.

Are all of these PC's on the same network subnet?

They are, and the port forwarding, we just tried anything to push the Port to work. It isn't enabled anymore.

Do either connect? Do either get a response from the server?

Both http and https load the same error of taking too long to respond.
Chris P 20 Reputation points

2023-10-30T21:36:58.86+00:00

I will also note, as it may create a significance, I just completely forgot...

When I was first told about this, when I went on to an affected PC as an Admin Local Account (All PC's are Local Accounts btw), I was able to load the button just fine. In fact, I could do it on all admin accounts, but not on standard Users accounts. I changed the staff member to be an admin account, but it didn't fix it. I created a new admin account, and it couldn't load it. After I restarted the computer, all accounts, including Admins could not load it anymore.
MotoX80 36,291 Reputation points

2023-10-30T22:49:57.18+00:00
This may sound crazy, but I enjoy trying to figure out bugs like this. So I've got some things you can try.

I go back to your comment:

but even if I load the url in Firefox on affected PC's, the netstat -ano still doesn't show port 8080 established, so I have no idea how Firefox is loading the page.

I wonder if something is trying to force IPV6.

Try this Powershell script, run it on a working pc and one that fails. Use your server name.

Do the IP addresses match? Tracert look the same?

$ServerName = "test10" $ports = 135, 445, 3389, 80, 443, 5088, 8080 $results = @() cls foreach ($p in $ports) { $results += Test-NetConnection -ComputerName $ServerName -Port $p -ErrorAction Ignore } $results | Format-Table -Property RemotePort, RemoteAddress, TcpTestSucceeded ping.exe $ServerName tracert.exe $ServerName NetSH.exe WinHTTP Show Proxy

Download and run Tcpview,

https://learn.microsoft.com/en-us/sysinternals/downloads/tcpview

Run Edge and Firefox. For each, close all tabs except one, and navigate to "about:blank" on that one. Check Tcpview and set its update speed to 5 seconds. In the options menu, uncheck Resolve Addresses. Sort by Process name. Eventually all connections should close. Run a test. See what IP it tries to connect to.

Try using the server's IPV4 address in the browser url.
Chris P 20 Reputation points

2023-11-01T06:19:00.7233333+00:00

OMG!

So your script shows all correct IP and such.

The TCP View has potentially cracked it!

TCP View on a working computer and Edge goes to the correct IP (192.168.1.100)

The broken one however, goes to 192.168.13.2!

I have no idea how or why, but this must be it!
MotoX80 36,291 Reputation points

2023-11-01T12:07:49.98+00:00

Do have something at that address? Or anything on the 192.168.13.nnn subnet? Does "nslookup 192.168.13.2" return a name?

What is Edge using for DNS? If you are using Google's 8.8.8.8 for DNS, you might be picking up someone else's servername.

Try resetting Edge settings to their default. edge://settings/reset
Chris P 20 Reputation points

2023-11-03T01:16:50.72+00:00

NS Lookup Results for a working PC and non-working PC:

Working:

Not Working:

I tried resetting Edge already.
MotoX80 36,291 Reputation points

2023-11-03T03:15:34.8+00:00

What is 192168013002.tpgi.com.au? Is that the pc name that you are trying to access? Is that the name of a machine on your network? Why would your application try to access that name/IP?

On my home network, if I bring up a PC named test10, I have it's network configured to use DHCP and to register the name on the WiFi router. All machines on my network use the router as the DHCP/DNS server so that I can register names locally. If the router cannot find a name, it will forward the request off to the internet DNS servers for resolution. I do not have much experience with 8.8.8.8 but from my understanding, it makes no sense from a local name resolution perspective. You can't register your xxxxxx at 192.168.13.2 because there could be hundreds of machines that have that IP. Or if you use a common name like server01, there could be hundreds of machines that have that same name.

I would assume that the pc's that work are falling back to network discovery for name resolution. But I'm not sure.

You might need to explain your strategy for local DNS resolution and why you are using 8.8.8.8. That is, for pc's that that use 8.8.8.8 as their DNS server, how do you expect them to resolve the IP addresses of local pc names? Why aren't you using your local router for local name resolution?
Chris P 20 Reputation points

2023-11-03T03:28:46.69+00:00

I do not know, its there, I can't ping it, it says unreachable. I use Google DNS for more stable and faster internet than obtaining ISP DNS. All computers but the Server PC has DHCP. I changed DNS to be auto and still nothing.

tpgi.com.au would be related to the ISP called "TPG" here in Australia.

There should not be a reason why there is 192168013002.tpgi.com.au at all.
Chris P 20 Reputation points

2023-11-03T04:35:10.8733333+00:00

I am going in over the weekend to do some isolation tests to see if that changes anything.
MotoX80 36,291 Reputation points

2023-11-03T12:33:10.14+00:00

If a working pc uses 8.8.8.8 for DNS, and the non-working one is using the router, then change it to use 8.8.8.8 and see if the problem goes away.

I thought that tpgi.com.au sounded familiar.

https://learn.microsoft.com/en-us/answers/questions/302088/how-to-switch-from-a-call-by-ip-address-to-a-call
Chris P 20 Reputation points

2023-11-03T21:24:10.0733333+00:00

I have forced my PCs to use both Obtain Auto from Modem/Router, manually to 192.168.1.1 and 8.8.8.8, but from the link you provided, looks like a possible solution is to do it at the Modem/Router level. So I shall try changing the DNS to Google DNS on Modem/Router, restart it and see if the computers resolve with Google DNS and the broken computers stop trying to TCP to 192.168.13.2. I also got new info from the boss on that a Camera Security System was put in, possibly around the same time as this issue, that I was not told about, and since most things were looked at remotely during this time, I never actually physically saw this. So it is also possible that something on the security camera system is doing something janky with IPs and Subnets and thats why over this weekend, I will be doing isolation tests, however I will try and do the DNS change.
Chris P 20 Reputation points

2023-11-04T03:39:18.8866667+00:00

I haven't done isolation tests yet, but so far nothing has fixed it. It is still trying to use the 13.2 IP.

To be fair, if it was a network device, like the Router, then other computers and all browsers would be like this. Only 3 PCs and only Edge and Chrome TCP to 192.168.13.2
MotoX80 36,291 Reputation points

2023-11-04T15:10:08.08+00:00
Does the pc show up in the network neighborhood? If not, in that last link that I posted, run the Powershell script to fix network discovery.

What do you have set in the browser for search? First try "Use current search provider". Then try "Choose a service provider". Try Google, then Cloudflare. And if it still doesn't work, try unchecking the "Use secure DNS..." option. Restart the browser each time you change it.

What is the name of the server PC? Is it a simple name that other users out on the internet might choose for a machine name? Or is it something really unique, like au123serv001?

Does the name show up here?

ipconfig /flushdns ipconfig /displaydns | findstr -i au123serv001-or-whatever nbtstat -r
Chris P 20 Reputation points

2023-11-05T03:06:47.67+00:00

Computers show up in network discovery.

Service Provider stuff didn't change anything.

bsm-seever

It shows up in all those command lines.

Just set up a new Laptop with the program, tested the button and it loaded fine on the correct IP with the 5088 port.
MotoX80 36,291 Reputation points

2023-11-05T12:49:41.8966667+00:00

Uninstall Edge and Chrome, reboot, reinstall.
Chris P 20 Reputation points

2023-11-05T13:26:47.0066667+00:00

Uninstalled Edge, Chrome and Edge WebView2.

Without WebView2, it uses IE and works. As soon as I put back WebView2, it uses that and fails again.

So its Microsoft WebView2 that is used by the program to load webpages/webhooks.

The program sooks about missing components without WebView2 installed.

But something is sticking into Edge, Chrome and WebView2 to make it point to 192.168.13.2, but I don't know how or why? There is no reason for this to have occurred, and on random PC's, and only on 3 of 9 - Plus 2 new Laptops that work fine.

There is something nested that I can't find.
MotoX80 36,291 Reputation points

2023-11-05T13:56:09.05+00:00

Can you browse other internal and external web sites? What about using the IP address of bsm-server and not the name?

Hit F12 to open the devtools. Check the network and console tabs and see if there is anything interesting in them.

Open regedit and search the registry for that name and the 13.2 ip address.

I'm running out of ideas. The next logical step would be to figure out how to capture an internal Edge trace.

Answer 3

MotoX80 36,291

See if this fixes the problem.

https://www.makeuseof.com/enable-automatic-https-microsoft-edge/

Chris P 20 Reputation points

2023-10-30T21:28:54.0333333+00:00

The post is from 2022, which might be a significant enough reason why I can't seem to find the first settings it mentioned, likely due to Edge changing its looks and such for the settings area.

I did the Flag section and disabled the automatic https, and that didn't work sadly.

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TCP not working on certain PC's/Browsers

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