How to open port 2195 in iptables CentOS 6 for activating the APNS

See my anwser here: https://stackoverflow.com/a/25229943/1472048

For CentOS 7, you should use "firewall-cmd" command like so:

firewall-cmd --add-port=2195/tcp --permanent

iptables is not recommended if you use the firewalld service.

Try the following command, it worked for me:

$ sudo iptables -A INPUT -p tcp --jport 2195 -j ACCEPT

$ sudo /etc/init.d/iptables save

How about:

iptables -A INPUT -p tcp --dport 2195 -j ACCEPT
service iptables restart

This may help too.

It didn't work for me completely, since my last rule was DROP ALL which basically negated all I added to iptables after.

It might be useful to use the -I switch:

iptables -I INPUT 1 -p tcp --dport 2195 -j ACCEPT

The INPUT 1 - means 1st Input rule instead of appending, to put rule in front of drop all

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