Do this:
1- Reset Gufw to the install state (clean all rules)
2- Set Gufw to Deny incoming, Allow outgoing.
3- Add a rule "Allow / Outgoing / Both / 12346"
4- Add a rule "Allow / Incoming / Both / 12345"
5- Check "ufw status numbered"
emi...@laptop:~$ sudo ufw status numbered
Estado: activo (Status: Active)
Hasta (to) <emph>Acción</emph> (action) Desde (from)
----- ------------------------
[ 1] 12346 ALLOW OUT Anywhere (out)
[ 2] 12345 ALLOW IN Anywhere
6- Click on the UI the rule that says "12346 / ALLOW OUT / Anywhere" and then
on Remove. The wrong rule will be deleted.
7- Check "ufw status numbered"
emi...@laptop:~$ sudo ufw status numbered
Estado: activo
Hasta <emph>Acción</emph>Desde
----- ------------------------
[ 1] 12346 ALLOW OUT Anywhere (out)
8- Check the Gufw logs:
ufw enable
ufw allow out from any to any port 12346
ufw allow in from any to any port 12345
ufw --force delete 2
As you can see, The ALLOW OUT rule is #2 for Gufw, but I don't know why.
I added it first, but nevertheless, after adding the second rule, it
appeared second in Gufw's UI. It might be related to the fact that it
isn't active (grey colored, and it doesn't make much sense as outgoing
is all allowed, why allow it specifically?)
Hope you can debug this issue with this information Marcos!
--
GUFW erases the rule not selected to be erased
https://bugs.launchpad.net/bugs/578404
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