I got two servers sitting on different location, the servers model/hardware are same. They may need to connect the VPN to external client with Anyconnect. I installed the Anyconnect and configured the VPN gateway's IP address. One server is able to connect without issue, but the other one was failed. I captured the tcp packet and saw it was connecting via netbios only, instead of using port 443. On the problematic server, I'm able to telnet the VPN gateway with port 443. Obviously, the firewall has allowed the connection.
I also tried to disable the NetBIOS on Win10 and reinstalled the Anyconnect v4.10. But it doesn't help to fix my problem.... Could anyone help?....
