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[ubuntu] Does Ubuntu Server block ICMP by default?

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linux-howto

http://ubuntuforums.org – Installed Ubuntu Server 10.10, included Apache, PHP, and OpenSSH. Apache is up and serving pages, I can connect using PuTTY no problem. Server responds to a ping. However, attempting to use ping or traceroute from the server results in a Destination Unreachable. Happens even for other 192.168.1.10x boxes on the local network. Any ideas why? Thanks, Tom (HowTos)