Firewall blocks browsing "Windows Network" with samba ports full open

[Jose Ortiz]

I am new to Linux, so please let me know if something I say doesn't make sense.

With a sensible configuration (opening seemingly correct ports), I find that ufw (under the GUI gufw) blocks access my Samba-based resources, at least from the "file explorer" in Linux Mint. In the file explorer, I click on "Network" and see "Windows Network". Without firewall, I click on "Windows Network", and I see a list of all the windows clients and samba clients on my network. I can explore them, mount them, etc, no problem.

With firewall, I click on "Windows Network" and I see nothing.

My relevant ports are open both ways to/from anywhere. gufw shows me this:
135 tcp both-ways anywhere
137 udp both-ways anywhere
138 udp both-ways anywhere
139 tcp both-ways anywhere
445 tcp both-ways anywhere
135 (v6) tcp both-ways anywhere
137 (v6) udp both-ways anywhere
138 (v6) udp both-ways anywhere
139 (v6) tcp both-ways anywhere
445 (v6) tcp both-ways anywhere

Below shows a similar problem, but the bug was reported as fixed.
(reported fixed) https://bugs.launchpad.net/ubuntu/+source/ufw/+bug/360975
It says:
"Please add nf_conntrack_pptp and nf_conntrack_netbios_ns to IPT_MODULES in /etc/default/ufw by default."

I tried the above "fix", but it didn't seem to change anything.

smbclient -L <server_name> seems to show the same information that supposed to be shown in the file explorer, and is not affected.

[costales (costales)]

Hi, I'm so sorry José, but this is not a forum for questions. Please, use askubuntu.com or ubuntuforums.org for them :) Thanks in advance!

[Jose Ortiz (joseortiz3)]

I'm sorry it sounded like a question - I'm pointing out that the default configuration blocks retrieving Samba lists. I disabled the firewall until I was able to manually mount the desired network drive in my directory. I then re-enabled firewall (blocking the samba list), but I don't need the list anymore. It's a bug - but ignore it if you want, I already have a workaround.