Install cups for local network

[roru2k20]

Good evening,

I know and read that I should not configure my firewall, but I run Cloudron at home as a server and on this machine and this place it is only possible to run my Dymo Labelwriter.

How can I configure successfull the firewall to run this idea?

At the moment netstat -tulpen said:

![b4b1104c-05be-43ee-9b31-82e2b40181c7-image.png](/assets/uploads/files/1634666270666-b4b1104c-05be-43ee-9b31-82e2b40181c7-image-resized.png) 

Can anybody help?

Have a nice evening!

Axel

[roru2k20]

Upppps wrong way for picture, but here

[roru2k20]

I add 4 rules for iptables

sudo iptables -A INPUT -p tcp -m tcp --dport 631 -j ACCEPT
sudo iptables -A INPUT -p udp -m udp --dport 631 -j ACCEPT
sudo iptables -A CLOUDRON -p tcp -m tcp --dport 631 -j ACCEPT
sudo iptables -A CLOUDRON -p udp -m udp --dport 631 -j ACCEPT

[roru2k20]

Okay I add these rules, but I can't access cups webgui and can't see my printer.

In which chain I must add the rule or what I have to do to access?

[roru2k20]

Yeeesss it works....

The following rule must be add additionally:

sudo iptables -A CLOUDRON_RATELIMIT -p tcp -m tcp --dport 631 -j ACCEPT
sudo iptables -A CLOUDRON_RATELIMIT -p udp -m udp --dport 631 -j ACCEPT

And my cups conf has follow lines (only an excerpt)

Listen *:631
Listen /run/cups/cups.sock
SystemGroup lpadmin

After that I add my own user during the installation of Ubuntu to group lpadmin to administrate cups and now it works well.

[nebulon]

@roru2k20 great that you found this out and thanks for sharing here