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09.16.2008 at 10:06AM PDT, ID: 23735864
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IPTABLES routing question.  Can't route when LAN is setup on a 172.18.25.0 network; can route when LAN is set as 192.168.x.0 network

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8.4
Tags:

Gentoo, Gentoo Linux, kernel 2.6.25 r7

I'm extremely confused on this issue.  I have a Gentoo Linux router running iptables with ETH0 set for DHCP and ETH1 as my LAN.  When ETH1 is set up as a 172.18.25.0/24 network and it's providing DHCP addresses in the same subnet, computers receiving that address cannot ping through the router.  HOWEVER, when I change the ETH1 to a 192.168.x.0/24 network (and match the DHCP settings), computers receiving addresses from that network CAN ping through the router.
What is special about the 172.18.25.0/24 network that makes the router inoperable?
Answered By: Soulja
Expert Since: 01/11/2003
Accepted Solutions: 119
Computer Expertise: Beginner
Soulja has been an Expert for 5 years 12 months, during which he has posted 605 comments and answered 119 questions. Soulja is just one of 40 experts in the Gentoo Linux Zone. 1 expert collaborated on this answer, which was graded a "B" by the asker.
 
 
 
 
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