<![CDATA[Multi WAN - DNS routing when default gateway is down]]>Hi,

I've just noticed today, after my primary internet access went down, that i couldn't resolve dns, then i noticed that the routing to the DNS servers i got configured in pfsense was going throw my default gateway.

Shouldn't the default gateway of pfsense change when i'ts down?

Or can i configure a firewall rule to make all traffic from 127.0.0.1 to DNS server go through my failover group?

]]>https://forum.netgate.com/topic/68765/multi-wan-dns-routing-when-default-gateway-is-downRSS for NodeSun, 11 Oct 2026 02:20:22 GMTMon, 05 May 2014 09:53:58 GMT60<![CDATA[Reply to Multi WAN - DNS routing when default gateway is down on Mon, 05 May 2014 16:13:28 GMT]]>@heper:

Did you specify a dns server for each gateway in System: General Setup ?

No, i've selected "none" on the "Use Gateway" option for all my DNS.
I guess i could make one DNS go through my primary gateway and the other through the secondary, but automatic change of default gateway seems a better option.

@heper:

Shouldn't the default gateway of pfsense change when i'ts down?
Not by default, you can however, enable this if you wish (System: Advanced: Miscellaneous: Allow default gateway switching)

I will activate this option and make some tests.

Thankx.

]]>https://forum.netgate.com/post/459890https://forum.netgate.com/post/459890Mon, 05 May 2014 16:13:28 GMT<![CDATA[Reply to Multi WAN - DNS routing when default gateway is down on Mon, 05 May 2014 14:57:23 GMT]]>Did you specify a dns server for each gateway in System: General Setup ?

[Shouldn't the default gateway of pfsense change when i'ts down? /quote]
Not by default, you can however, enable this if you wish (System: Advanced: Miscellaneous: Allow default gateway switching)

Or can i configure a firewall rule to make all traffic from 127.0.0.1 to DNS server go through my failover group?

Yes, create a floating rule - direction out - for tcp/udp on dns port (53) - check option quick - select gateway-group. (you would need to set dns servers reacheable from all your isp's

enjoy

]]>https://forum.netgate.com/post/459875https://forum.netgate.com/post/459875Mon, 05 May 2014 14:57:23 GMT