Post your questions about SoftEther VPN software here. Please answer questions if you can afford.
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Hello. I am having an issue with Softether VPN client giving error 1 when behind my SonicWall. If I bypass the firewall completely and connect the computer directly to the modem, Softether connects just fine and is fast and reliable. Same if I enable DMZ. But once I'm back safely behind my firewall, I get error 1 and no connection at all (unless I use VPN Azure which I don't like doing). What do I need to configure my firewall to allow in order to connect through it? It already allows ICMP. Thanks in advance.
Did a packet capture of a successful and unsuccessful connection attempt. In the unsuccessful attempt, the server's UDP responses are getting blocked. ICMP packets seem fine. Sonicwall dropping outbound malformed DNS packets?
Did you enable VPN over ICMP configuration?