Can't access specific server via SSLVPN
Weird problem...
TZ350, v6.5.4.10-95n
There is ONE new Windows Server 2022 machine on this system that I can (almost) never access through SSLVPN. Ping, SMB, RDP, all fail. Access from LAN works fine. Have not had VPN connectivity problems with any other machine, although there are only a handful at this site that I use remotely.
I was able to access the problem server via VPN once or twice. I don't know what magic made that happen.
Not name resolution; doesn't work with IP either.
There are no firewall rules on the SonicWall that involve its IP address. I have given it a different IP just to make sure and there was no change.
If I turn off Windows firewall on the server, there’s no change.
When I do a packet capture through a VPN connection setting monitor source filter to the VPN client IP. destination filter to the server IP, and protocol to ICMP, and do a continuous ping from the VPN client, I see packets I don't understand. I get 10-25 of these--
--followed by 1 of these--
--then a dozen or two more of the consumed LLC(0x0)'s followed by another LLC(0x27), and on and on.
But I don't see any of my ICMP packets.
It's probably telling me what the problem is, but I don't know how to interpret it. What is this telling me?
TIA
Answers
@CITS
check whether you added that server in SSL VPN client routes;
Ajishlal, thanks for your reply. The X0 subnet is in Client Routes. This server, and all other LAN devices, are on X0; it's a flat network.
Unless there are further ideas, I guess I'll need to open a support ticket.