Open a TCP port in Ubuntu's ufw firewall
Answer:
To open a TCP port, e.g. 8080 in the Ubuntu's UFW firewall (Uncomplicated firewall)
# sudo ufw allow 8080/tcp
# sudo ufw reload
How do I set up a firewall under Linux?
Answer:
In Linux, IPTables is the default firewall for kernels 2.4 and above.
IPTables is quite a complicated software which cannot be explained in just a few words, please refer to a more comprehensive howto:
