Remote Desktop Services connection initialization slow

Question

Remote Desktop Services connection initialization slow

Ming Cheung 60

I deployed remote desktop session host, all deploy successful

but when connecting to RDS by connector through wifi, it takes almost 3 mins, but finially successful

when connect through Lan, it takes few second only,

I tested ping, it takes 5ms TTL when wifi, the speed is not bad,

wifi use cert authen, laptop login AD, it is fast as well, just initial the remote desktop slow, but not fail

anyone can help?

Justin Herman 15 Reputation points

2024-08-30T21:04:35+00:00
Hello Ming,

There is so much to unpack and look at for this. Using certificates for wireless authentication is not a worry because once the certificate is authenticated, the device gets an IP address and all traffic afterwards is different. In my opinion, a 5ms ping on a LAN is not good. Should be 1ms or less, always. Except for the first ping, especially if using DNS.

So, here is what needs to be reviewed. Starting with the laptop/notebook/wireless device.

What is the WNIC? WIFI4, 5, or 6? 802.11a/b/g/n/ac/ax? Could be a faulty WNIC.

The access point.

What wireless connections is that built for? 802.11a/b/g/n/ac/ax? WIFI 4, 5, or 6?

Is the AP configured for the highest WIFI setting and bandwidth?

How many other devices are connected to it? How many devices can it handle?

How many radios / antennas are in the AP? Can each antenna support all frequencies or it is one frequency per antenna? Could you add external antennas with gain?

Is beamforming technology enabled?

How far away are you from the access point? 2 meters or 20 meters?

Are there walls or obstacles between?

Is there electrical interference? Microwaves, bad outlets, electrical panels, air conditioners nearby, electric motors?

Are there switches, hubs, or routers between the access point and the other remote endpoint?

Are the any ACLs setup on the networking equipment?

Is Quality of Service (QoS) used on the network?

On both end points and networking gear, you could enable QoS, is available.

On the Windows systems, you can enable QoS for RDP. https://learn.microsoft.com/en-us/windows-server/networking/technologies/qos/qos-policy-top If not in a domain, open the Local Group Policy Editor, gpedit.msc > Computer Configuration > Windows Settings > Policy-based QoS > right/click Create New Policy...> type in a name and then set DSCP to 40 (https://support.zoom.com/hc/en/article?id=zm_kb&sysparm_article=KB0066617 and https://learn.microsoft.com/en-us/windows-server/networking/technologies/qos/qos-policy-manage) > Set to "Only applications with this executable name: "%windir%\System32\mstsc.exe" > Next > change dropdown to TCP and UDP because RDP can use both and then click Finish. Do to both machines.

Also, you can take packet capture using Wireshark or the native Windows tools. Check for repeated connections and failures.

I would monitored Resource Manager network connections.

Let us know if any of this helps. This will take time.

Justin

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Answer 1

Hello,

As Mr. / Ms. Herman explains, check if your router has Quality of service (QoS) Settings that prioritize certain types of traffic. This may affect the speed at which certain connections are made.

Pay special attention to the following aspects when troubleshooting this problem:

Make sure your Wi-Fi NIC driver and router device driver are updated. Regarding driver updates for Wi-Fi nics, here are the general steps:

• Press the Win + X key to open and select Device Manager.

• In Device Manager, expand the Network Adapter option. Right click on your Wi-Fi network adapter and select "Update Driver".

• Select "Automatically Search for updated driver software", the system will automatically search for and install the latest driver.

When you use certificate authentication over Wi-Fi, so make sure the certificate verification process does not cause delays. It is recommended that you check the authentication log in the event viewer to see if there are any delays or problems during this process.

Wi-Fi signal strength and quality can also affect performance. Stay close to your router or access point to make sure the signal is strong.

Best regards

Jacen

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