Windows Server
A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.
12,635 questions
I wonder how many tftp connections can be made
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Violetforest Choi
1
Reputation point
I wonder how many tftp connections can be made.
We are using tftp for a system we are developing.
The connecting client is the uefi shell environment, and it connects to the server through tftp.I open a tftp server in C#, and periodically update the file to the server.
Currently 24 clients are having problems connecting. As a result of searching for this part, it was found that 20 users could connect in the Windows 10 environment.
Q1) Is tftp (UDP) access limited to 20 users in the Windows 10 environment?
Q2) Is it possible to improve to more than 20 users when changing to Windows Server?
Q3) How many users can access the Windows Server license?
Q4) Is there any guide on the Windows side?
Thank you for answering the questions.
{count} votes
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MotoX80 32,911 Reputation points2022-07-08T12:57:34+00:00 Does the client close the connection after it reads/writes the file? Does your TFTP server code close the connection to the clients after a file transfer?
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Violetforest Choi 1 Reputation point
2022-07-10T04:09:21.017+00:00 The client side closes each time the transfer is complete.
but The server side seems to be open. -
MotoX80 32,911 Reputation points
2022-07-10T13:21:10.977+00:00 It's been years since I last played with TFTP, and Microsoft has removed the TFTP server from Windows, so I have nothing to test with. An internet search shows the 20 client limit on Win10 but it's for network shares.
What error message do your clients get when they can't connect? If you don't know, install the Windows TFTP client on a pc and try to access your server to see if that shows an error.
Does "netstat -aon" show 20 established connections to your C# program?
What software are you using for the TFTP server? Does it have any limitations? There is no sense in upgrading to Windows Server until you know for a fact that it's Windows rejecting the connection. Have you checked your application and system eventlogs?
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Violetforest Choi 1 Reputation point
2022-07-11T04:18:43.12+00:00 I also wonder if the 20 client limit is necessary for tftp connections. 20 I know that client restrictions are limited when connecting remotely, such as Remotecontrol or Telnet. I'm not sure if this also applies to tftp.
tftp server uses c# library. Since the client is an edk2 UEFI shell environment, it can only use tftp or so. I know that there are no restrictions on the C# library or server HW side.
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