@stephenw10 said in PF sense crashed after upstream ISP upgrade . Fixed but , working strangely .:
127.0.0.1
It was a DNS issue , the PF sense had been inheriting DNS from the upstream ISP ( Virgin ) . There is something wrong since the upgrade with DNS , working with PF sense .
I re-entered DNS addresses 8.8.8.8 & 1.1.1.1
I changed the DNS settings , to and unchecked " DNS to be overwritten by DHCP WAN"
I then set DNS Resolution Behavior tp 'Use local DNS , and ignore remote DNS "
Seems to be working again now