Comment 4 for bug 1967611

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Heinrich Schuchardt (xypron) wrote :

/var/log/syslog has:

Oct 7 15:42:33 laptop kernel: [21375.839338] [UFW BLOCK] IN=lxdbr0 OUT= PHYSIN=vethdfc21f4f MAC=00:16:3e:38:26:a2:00:16:3e:4d:c5:95:86:dd SRC=fe80:0000:0000:0000:0216:3eff:fe4d:c595 DST=fe80:0000:0000:0000:0216:3eff:fe38:26a2 LEN=78 TC=0 HOPLIMIT=64 FLOWLBL=740385 PROTO=UDP SPT=32931 DPT=53 LEN=38

So DNS is blocked.

$ sudo ufw status verbose
Status: active
Logging: on (low)
Default: deny (incoming), allow (outgoing), deny (routed)
New profiles: skip

Disabling ufw is a usable workaround.

BUT disabling ufw is not recommendable security-wise. snapcraft should come with the necessary ruleset for running behind ufw.