some return traffic not going through vpn tunnel (although not all)
Very strange problem, my guess is a configuration error. Clients connecting to an 1841 with a VPN tunnel endpoint on its Dialer0 interface (ADSL WIC on an ISDN line) have no trouble accessing LAN resources (file shares, Exchange mailboxes via a MAPI client, ping, etc.). However, when configuring an IMAP connection on a remote VPN client, outgoing email would not send. The strange thing is that the port 143 traffic between the client and IMAP server flows properly.
It turns out that port 25 traffic correctly flows from the client to the SMTP server, but that return traffic from the server to the client does not flow back through the VPN tunnel. Instead it routes back out through the public IP address. Can anyone offer a suggestion? (And please feel free to comment on the config in general, i.e. unnecessary ACL entries, etc.)
The VPN address pool is 10.10.10.0/24. The LAN subnet is 10.0.0.0/24. Host 10.0.0.209 is the SMTP server. xxx.xxx.xxx.xxx is the public IP address on Dialer0. The packet trace follows and the config is attached as config.1821.cisco.forum.txt.
Re: some return traffic not going through vpn tunnel (although n
SDM can troubleshoot VPN connections that you have configured. SDM reports the success or failure of the connection tests, and when tests have failed, recommends actions that you can take to correct connection problems.
The following link provides information on VPN troubleshooting using the CLI.
Login to the FXOS chassis manager.
Direct your browser to https://hostname/, and log-in using the user-name and password.
Go to Help > About and check the current version:
Check the current version availa...
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In Syslog I also se...