I have setup a strongswan site-site vpn with opensuse 11.2/3 and strongswan 4.5. I cannot for the life of me get DNS to work over the VPN, does anyone know how to accomplish this?
Thanks.
I haven’t had personal experience with this VPN software and unless anyone else has, I can only suggest some general troubleshooting approaches which work for all VPNs. Before anything else, it might be useful to know what protocol this VPN technology uses, ie. PPTP, IPSEC, SSL, something else.
A first question might be if you have determined whether hosts from one site can “see” hosts in the other site using IP addresses. An easy way is to simply ping the Host in the remote site by IP address. Like all networking, you have to verify basic network connectivity before you can address name resolution issues.
Exact name resolution solutions will depend on the following in no specific order
Is your VPN setup for bridging or routing traffic to the other site?
What name resolution methods are you using already in each site?
Are you blocking ports or protocols between sites?
How is your DHCP set up in one or both sites?
What network authentication exists in either or both sites?
How are your Default Gateways setup for each site?
What do your routing tables look like?
Tony