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Server unable to ping

Hi,

we have a server that we can SSH to remoteley over the internet. But the server is unable to ping and domains or ip addresses outside its own network.

The server is running asterisk and that is working fine it can make calls fine. But it will not ping the voip ip server, which it is obviosuly communicating with to make calls!

Thanks
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andybrooke
Asked:
andybrooke
1 Solution
 
woolmilkporcCommented:
Seems that this server sits behind a firewall or router which would block ICMP (ping) traffic.

Such a setup is not uncommon.

wp
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eappiahCommented:
Are you sure it's not firewall rule in your network to block PING/ICMP?
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motnahp00Commented:
Did you enable a firewall rule to allow inbound and outbound ICMPv4 or ICMPv6 Echo Requests?
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woolmilkporcCommented:
A quote from "serverfault.com" explaining why it could make sense blocking ICMP:


It's possible, for example, for a malicious piece of software on a compromised system to send messages "back home" via fake echo replies. This could give the remote listening system quite a bit of information that you don't necessarily want it to have, one little piece at a time. Anything the malware has access to could go right out the pipe.

http://serverfault.com/questions/55889/why-block-outbound-icmp
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gpizzutoCommented:
Check, if you have 2 network adapters, if the gateway's values as set up correctly.
The ping could arrive to the server, but it replies throught the other adapter
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andybrookeAuthor Commented:
service iptables stop is enabled on boot and its off. I checked the router draytek 2830 and all looks ok.... I can ping the router externally
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