No ping reply

bambolin · 10-28-2004, 04:54 PM

I have a linux box connected to a winbox through a hub. The ip of nic card of the winbox is 10.0.0.152 and the ip of nic card of the linux box is 10.0.0.151. When I ping from 152 from 151 i get ping replies. But when i ping from 152 (winbox) to 151(linux box) i get no replies! I don't know if there is a firewall enabled or something that is disabling ICMP. I am running mandrake 9.2

BTW am a newbie!

slide-rule · 10-28-2004, 05:01 PM

can the linux box ping itself as 127.0.0.1 (localhost) and/or 10.0.0.151 and get replies? Assuming yes, there may be firewall policies in place that are dropping packets. (Are you on a relatively fresh install, or have you been mucking about with configs a bit?) Check if the lin box has "shorewall" and/or "ipchains" and/or "iptables" services running; these are likely candidates on MDK doing firewalling.

slide-rule · 10-28-2004, 05:03 PM

possibly helpful followup... as root, do "service iptables status" (etc) on a command line to check if iptables (etc) is running. If found, you can "service iptables stop" (etc) to take them off line. Then try pings from the other box.

celejar · 10-28-2004, 09:46 PM

Can you access the winbox in other ways over the network (e.g. Samba, telnet) ?

bambolin · 10-29-2004, 06:05 AM

Yes i can access the winbox by ftp and that makes me suspect that mandrake is running a firewall. I did some research on mandrake firewall and slide-rule pointed out there is a firewall called shorewall. But I don't know how to check if it is enabled or how to disable it or configure it to allow some ports etcetc!

harish_neo · 10-29-2004, 06:17 AM

Hi,

Check for ip tables which is actually a firewall in your linux box. Probably it will be blocking ICMP reply packets. Better check that.

- Harishankar

harish_neo · 10-29-2004, 06:18 AM

Try disabling the firewall by the command

service iptables stop

and check whether u r able to ping or not !!!!