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Old 11-06-2007, 07:37 PM   #1
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One way ping

Hi everyone, first post (be kind!)

I have a new FC6 box here that I have set up on the network and mounted remote file systems in /etc/fstab which I can read and write to with no problems. I can ping out of the new machine, but no computers can ping into it. It gets an ip address from out dhcp, can browse the web and can see all the computers in the network browser, but no-one can see it!

I have other FC6 boxes here (slightly different hardware) and they all have identical network configurations, as far as I can tell

Any ideas? Thanks,

Old 11-06-2007, 07:50 PM   #2
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It could be sysctl or your firewall. Have a look in /etc/sysctl.conf for a line like this:
net.ipv4.icmp_echo_ignore_all = 1
You can set this to 0 instead of 1 and reload the change with sysctl -p. If that doesn't work, have you checked your iptables settings to see if the pings are being dropped by your firewall? Often, iptables logs to one of the /var/log/{syslog,messages} files - there may be info in there.



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