Hi,
I'm using the preconfigured firewall that comes with CentOS 5. I configure it with system-config-securitylevel-tui, close all ports except SSH, and then open only the ones I need.
Right now, on one of my desktops, I've installed AMSN, which requires opening a series of ports. I've configured the app to use ports 7000 to 7010 (TCP and UDP). When running system-config-securitylevel-tui, the last line enables to define custom ports, not mentioned elsewhere in the menu. So, for example, when I want to add port 6891 for tcp and udp, I write an entry like this:
6891:tcp 6891:udp
But what's the syntax for several ports? I tried this:
7000-7010:tcp 7000-7010:udp
And then, 'service iptables status' gives me this:
10 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:4662 11 ACCEPT udp -- 0.0.0.0/0 0.0.0.0/0 state NEW udp dpt:4672 12 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp pts:7000:7010 13 ACCEPT udp -- 0.0.0.0/0 0.0.0.0/0 state NEW udp pts:7000:7010 14 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:22 15 REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited
Does that mean that I have opened ports 7000 to 7010? Or only ports 7000 and 7010? I'm not quite sure how to read this.
Cheers,
Niki