DNS problems with SBS 2003 behind PFSense
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Hi everyone,
I have recently setup a PFSense box using four ADSL lines for load balancing. This sits in front of my local network which is running Windows Small Business Server 2003. I have been having what I think are DNS problems. I use the Windows DNS server for all DNS queries, no forwarders at all. In PFSense I have set the DNS server in the General tab to my SBS machines IP and have turned off the DNS forwarder. When I browse to a website it will generally fail, but if I refresh the page it works. NSLOOKUP displays similar behaviour, the first request fails but subsequent requests resolve.
I have opened ports 53 TCP/UDP on the LAN tab of the firewall but I am not sure if there is more that I have to do from that point on (ie. NAT).
I would also like to know if the addressing of my four routers is correct, currently they are setup like this:
WAN -> using PPPoE so it gets an IP automatically.
OPT1 -> 192.168.0.253 -> Gateway 192.168.0.254
OPT2 -> 192.168.1.253 -> Gateway 192.168.1.254
OPT3 -> 192.168.2.253 -> Gateway 192.168.2.254My LAN is set to 192.168.0.250
Any help would be greatly appreciated.
Regards
Nick
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Re: DNS
You shouldn't need any ports open on the firewall for your SBS server to do DNS queries if you have the default LAN rule. Open up the DNS manager on the SBS server and verify it doesn't have a bogus forwarder. (server, properties, forwarders tab) Sounds like you have a Windows DNS problem, not a problem with pfSense. -
Thanks for the reply. I managed to find the problem, our ISP DNS server was having problems. Changed to OpenDNS as forwarder and now its working.
