Public bug reported:
Sorry, this is going to be a very bad report. Here's what I did:
- installed gufw and enabled it, no rules, just default incoming=deny
outgoing=accept
- rebooted
- Ethernet says it connected
- no network access; ping 1.1.1.1 fails
- launch gufw, and it says it's disabled (the whole firewall)
- I think eventually I figured out that iptables had been emptied and INPUT
chain set to DROP
After many travails, I captured a piece of dmesg output as the system
was booting, and I think it shows ufw trying to check IPv6 status and
deciding to stop everything. At least logging (which was set to full in
gufw) suddenly stops.
In network manager, I've tried to say "ignore IPv6". I'm not sure if
this trouble is related to fiddling with the "only work if IPv4 is
enabled" check-box, which seems to have a ToolTip that is exactly
backwards. My ISP does not give IPv6 service. I've tried many settings
of the IPv6 drop-down in System Settings / Network GUI, setting and
clearing the IPv4 and IPv6 required check-boxes, etc.
So, I'm totally confused, but I think the log shows that logging
suddenly stops (from full to zero), which must mean ufw detected some
condition that made it empty out the iptables and set everything to DROP
? If so, ufw should have logged a message saying it was doing so, and I
don't see such a message. So, if I'm right, at least this is a feature
request that ufw should log a message when it decides to stop all IPv4
or IPv6 traffic and/or stop logging and/or wipe out all rules.
Sorry about the mess of a report.
I'm using Kubuntu 20.10, gufw 20.10.0-0ubuntu1, ufw 0.36-7
ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: ufw (not installed)
ProcVersionSignature: Ubuntu 5.8.0-41.46-generic 5.8.18
Uname: Linux 5.8.0-41-generic x86_64
ApportVersion: 2.20.11-0ubuntu50.5
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: KDE
Date: Fri Feb 5 20:35:18 2021
InstallationDate: Installed on 2021-02-03 (2 days ago)
InstallationMedia: Kubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022)
SourcePackage: ufw
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: ufw (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug groovy
** Attachment added: "dmesg1.txt"
https://bugs.launchpad.net/bugs/1914816/+attachment/5460643/+files/dmesg1.txt
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https://bugs.launchpad.net/bugs/1914816
Title:
ufw not logging if it decides to stop all traffic ? Confused
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