I’ve been using Adam:ONE on pfSense for about two weeks now and generally I have been happy with it but one nagging thing is causing me a bit a grief. At seemingly random times of day I will go to visit a given website such as wikipedia dot org and DNS resolution will fail completely this is confirmed by pinging the domain at OS level from any client on my network (iOS, Windows, etc.). However, during this time I am able to ping other domains such as google.com etc. without issue. If I wait a couple minutes and try pinging the original site (wikipedia dot org etc.) all of a sudden resolution will start working again.
The behavior is almost like the problem domain is dropping out of a cache somewhere but other domains are left unaffected. I have double checked my rules and I don’t have anything that blacklists any core cloud infrastructure like AWS EC2 etc. so I doubt any of the Adam:ONE filters is interfering. It’s just a very odd and annoying issue that I’m hoping I can get to the root of.
I thought it may have been OpenDNS as I had it as the default DNS provider but I have since switched to the much more capable CloudFlare 220.127.116.11 (specifically 18.104.22.168 for their family filter) and the issue persists. If anyone has hit this and can provide some feedback on a resolution or things to try I would greatly appreciate it. Thank you!