Flush pfSense DNS Cache

sinac

I'm really embaressed to have to ask this, but anyway:
My pfSense has an IPSec Tunnel to another site which has a dynamic IP address and a dyndns domain. The ip changed and the dynamic domain is updated, but pfsense won't resolve the new ip address. I guess it's cached within pfSense but I don't know how to flush the DNS Cache on pfSense. I already restarted dnsmasq but it still resolves to the old IP. Any ideas?

digininja

I just had to work out the same thing, not sure if there is a better way but if you send a HUP to the dnsmasq process then it will reload it.

ssh to the pfSense box then


ps aux | grep dns

to get the process id


kill -HUP

to trigger the reload.

jimp

Or just go to Status > Services, and click the restart button on dnsmasq. Much easier, and it flushes the cache when restarting.

It's also documented here:
http://doc.pfsense.org/index.php/How_do_I_clear_the_DNS_Forwarder_cache%3F

digininja

Well there you go sinac, you've got two answers now! Jimps is much easier than mine so I'd go with that.