UDP Return traffic in site-to-site VPN
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Hello All,
I have 2 sites connected by OpenVPN on pfSense. Everything is working just fine except for UDP return traffic.
Using TFTP as an example:
A TFTP client on the main site, via the OpenVPN connection, can connect to a TFTP server on the remote site and download a file.
A TFTP client on the remote site cannot download a file from the TFTP server on the main site. I can see the remote connection on the server, but the download doesn’t start and I get a timeout error in the client side.
From this example I conclude there should be no problem with the firewall rules, but I don’t know where the issue is.
This was just an example, I need other ports on 2 printers to get return UDP traffic from the main site.
Any help would be greatly appreciated.
Thanks in advance, and my apologies if this is a stupid question.
Kind regards,
GAR