I'm trying to resolve these two repeating errors in /var/log/syslog
...
nf_conntrack: nf_conntrack: table full, dropping packet
Maximum number of concurrent DNS queries reached (max: 150)
Looking at /etc/resolv.conf
...
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
# 127.0.0.53 is the systemd-resolved stub resolver.
# run "systemd-resolve --status" to see details about the actual nameservers.
nameserver 127.0.0.1
I know that the nameserver should be 127.0.0.53, from looking at my other 18.04 system. If I manually change (which I know I shouldn't do) 127.0.0.1 to 127.0.0.53, the errors seem to stop in syslog. Of course, a reboot sets this file back to 127.0.0.1.
How do I get resolv.conf to correctly show 127.0.0.53, and survive reboots? Am I barking up the right tree?