Server 2016 DC running Radius on Proxmox Packet Dropping Packet Issues.

[Marcott]

We are currently running one Unifi Server at Location A. There we set up Server 2016 Radius server on our VMware stack and everything is working perfectly. at Location B which is a remote location we have a Server 2016 DC running Radius same setup as Location A only running on Proxmox version 7.4-16. The problem we are having is we see the packet come across the linux bridge and hits the Server then it just drops the packet. I have been digging around all day and some saying that this can happen as a result of of how the linux bridge works in proxmox. We have no issues at all at location running esxi. We use proxmox at all our remote locations so any help on this issue would be greatly appreciated!

 

[_gabriel]

is PVE standard network config ?
is PVE firewall enabled ?
post output /etc/network/interfaces could help us.
upgrading to PVE 8.1 can help too.
I'm not expert but Radius seems UDP based protocol and if Linux Bridges did not work with the UDP, that would be known.

 

[Marcott]

PVE standard bridge with firewall off below is the output but just took the rest of the ip’s out.. might be a bit before I can upgrade it to 8.1..

auto vmbr0
iface vmbr0 inet static
address 10.X.X.X
netmask 16
gateway 10.X.X.X
bridge-ports eno1
bridge-stp off
bridge-fd 0

 

[_gabriel]

Try an udp connection with socat.

edit: just tried, it works, like other service like WireGuard and OpenVPN.

 

[Marcott]

I have no doubts it will accept UPD packets but there has to be something because the radius server at location A works fine. The radius server at location B will not.

 

[_gabriel]

you need to dig about all the chain...
nobody can guess your config

 

[Marcott]

With wireshark we notice the length of the packet that it request and what is rejected are two different lengths.