Blaz:
Thanks for the tips ...
I'll try the suggestions you mention. I'll be back in touch.
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Working with iptables (CentOS 5.2) .... "allowing ICMP" and "opening up SSH" ...
Hi:
I have PBX in a Flash 1.4 (runs on CentOS 5.2) ...
The PC this PBX runs on has two NIC cards.
One NIC is on a 172.x.x.x subnet (NAT) with no access to the Internet from the LAN.
One NIC has a LIVE 'static' IP address which reaches right to the ISP with no router/firewall in front of it.
I am not able to 'ping' the LIVE 'static' IP address the 2nd NIC is assigned.
I've setup PBX in a Flash 1.4 in the past (in a few other configurations), and I've never really been able to get ICMP to work.
I would like to be able to ping the LIVE static IP address from another host on the Internet.
NOTE: ICMP replies 'work' if you try to ping the 172.x.x.x IP address from another 172.x.x.x host, but not the LIVE static IP address assigned to the 2nd NIC.
I am thinking this is not a PBX in a Flash 1.4 concern, but rather an iptables configuration.
How (or what) do I configure inside CentOS to 'allow' incoming ICMP to reply?
-------------------------
Next, if use PuTTY from another PC on the 172.x.x.x subnet, I can SSH into the PBX in a Flash 1.4 PBX.
If I am on another 'Internet' PC, I cannot SSH into the LIVE static IP address of the PBX in a Flash 1.4 PBX.
Again, I think this is quite possibly a CentOS iptables/firewall boggle.
How/what can I do to be able to SSH into the PBX in a Flash 1.4 PC from another PC on the Internet?
Thanks in advance for your time and tips.
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by: BlazPosted on 2009-03-20 at 01:06:40ID: 23937566
you can look at current iptables rules with command (please post the output)
/sbin/iptables -L -nvx
For enabling all ICMP packets you could write:
/sbin/iptables -I INPUT -p icmp -j ACCEPT
For SSH access:
/sbin/iptables -I INPUT -s <your_source_IP> -p tcp --dport 22 -j ACCEPT