How to get best DNS performance
I am using 2.3.2-R-p1 and have 3 DSL lines. 2 are set to weighting 5 and 1 to weighting 1, reflecting their speeds (the latter is ADSL, the first 2 are FTTC)
There are 4 gateway groups setup - one with all connections, the rest to take account of a failure of one line.
In firewall rules, the all connections rule is at the top on the LAN, and I can see all the traffic is going through this rule as expected.
One of the FTTC lines is the default gateway, and in General Setup/DNS server I have put 4 of the relevant ISPs DNS servers - one from each and 2 from the "default" one.
Am running DNS resolver in forwarding mode. On the internal domain there are DNS servers, and the PCs are set to get DNS from the servers. These are set in turn to forward to pfsense. OK so all is working so I have run namebench, which has recommended 3 other DNS servers.
Not sure of the best place to put these to try - on Dashboard it's showing 10 DNS servers - not sure where it is picking all of them up from.