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Hi, I quite new to linux suse 9. I wanted to implement some firewall setting on my sip server. The problem is that i don't know we to start. I'm thinking that if I implement such thing would block the connection(sip) to my other server/partners in other country. I have a boogey last time. How can I implement the firewall without affecting the asterisk,sip connection to other servers. How can I also allow a sshd connection to certain IP address.Here is what I've got the on the logs.
Nov 16 05:54:10 ss7box sshd: Failed password for illegal user magenta from ::ffff:220.127.116.11 port 46497 ssh2
Nov 16 05:54:11 ss7box sshd: Illegal user magenta from ::ffff:18.104.22.168
Nov 16 05:54:11 ss7box sshd: error: Could not get shadow information for NOUSER
Nov 16 05:54:11 ss7box sshd: Failed password for illegal user magenta from ::ffff:22.214.171.124 port 46571 ssh2
Nov 16 05:54:12 ss7box sshd: Illegal user maroon from ::ffff:126.96.36.199
Nov 16 05:54:12 ss7box sshd: error: Could not get shadow information for NOUSER
Nov 16 05:54:12 ss7box sshd: Failed password for illegal user maroon from ::ffff:188.8.131.52 port 46639 ssh2
Nov 16 05:54:13 ss7box sshd: Illegal user maroon from ::ffff:184.108.40.206
Nov 16 05:54:13 ss7box sshd: error: Could not get shadow information for NOUSER
Please help me on this one. Thank you very much in advance