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Old 04-18-2004, 06:36 PM   #1
hamish
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Can't ping - iptable problem (possibly ICMP or OUTPUT)


Hey

I'm trying to set up a network in my flat. My flatmate has already set up the computer which talks to the Internet. I am setting up a second server which will allow my other pc to access the internet via my computer and then via the internet

Here is a diagram

Internet
|
gateway (172.24.15.225/255.255.255.240)
|
My PC (172.24.15.228/255.255.255.240 and 10.0.0.1/255.255.255.0)
|
2nd PC (10.0.0.2/255.255.255.0)

Ok, I have loaded the iptables modules loaded, IP forwarding is set on and have used the base of an iptable script from the Red Hat Bible.

At one point, I managed to get all computers on the network pinging My PC, but I could not ping any of them. Now I can do neither.

I believe that it is a problem, either with the OUTPUT lines or with ICMP, however, I don' tknow enough about it and I have seached the Internet all night for help.

Could someone please explain to me how to set up my iptables so that all computers can talk to each other?

I have upload my iptables script here: http://www.icue.co.uk/myfirewall.txt (soorry it is such a mess, it has been a very long night!)

Thanks in advance for all your help.

kind regards
Hamish
 
Old 04-18-2004, 09:01 PM   #2
RHELL
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You have two public class B ip addresses on your private network?
 
Old 04-21-2004, 03:08 PM   #3
hamish
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Are you suggesting changing the netmask or the IPs?

When the IPs are in the same area as the rest of the network, ie 172.24.15.2*, the network doesn't work. I changed the netmask to make it the same as the rest of the network, but that didn't work either.

Hamish
 
Old 04-21-2004, 09:30 PM   #4
RHELL
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Well, neither actually, I had a recto-cranial inversion, those ARE private Class B addresses.
Let me ponder before I misinform again.
 
  


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