Timothy Murphy wrote:
I'm running CentOS-6 on an HP MicroServer (since this morning) and I'd like to open an non-standard port, for use on a laptop attached to the internet through the server.
Do I have to explicitly add an iptables rule? If so, and I want to open (say) udp port 500 , what command should I give?
...
My recollection is that in old versions of CentOS one could non-standard ports through system-config-firewall ; but it seems that now this can only be used for standard ports;
Apologies. There is a perfectly clear option "Other Ports" on running system-config-firewall as root.
There does seem to be a bug/feature: if you enter the same procedure by Administration=>Firewall (in KDE) you cannot make any changes (at least I could not) even after giving the superuser password, when requested.