Gday
This looks like something we had really BAD problems with for weeks.
Firstly, even though ip_forwading is turned on in the kernel, (make sure by typing:
cat /proc/kmsys | grep ip_forward
it needs to be activated within the /etc/sysconfig/network file
We couldnt ever get this thing working on RH 5.0 between 1 ppp interface and 2
ethernet
interfaces, which had several different subnets over them.
We dropped back to 4.2 and it works like a gem.
I have a feeling it was a glibc update that causes the problem, but, our companies
name
was on the line so a quick fix to a known working solution was required which meant we
couldnt test our theories.
Regards
adam
> after *endless* months trying to live with a NT internet server which
> performed horribly and crashed regularly (the record was 19 times in
> *one* hour), the management at my company at last agreed to try out
> a machine running RedHat linux. hurrah! BUT i'm having a problem
> with forwarding IP traffic between two ethernet cards.
>
>
> ------ +------------------+
> ---- router --------| aaa.bbb.ccc.dde |
> ------ | |
> aaa.bbb.ccc.ddd | "A" |
> | |
> | |
> | 10.10.10.101 |----+
> +------------------+ |
> |
> | +--------------+
> ------- | "B" |
> | hub |---| 10.10.10.201 |
> ------- | |
> +--------------+
>
> the two ethernet cards in machine "A" are 3com 3c905 PCI cards
> (as is the card in "B" if that matters). both A and B are Pentiums'
> running linux 2.0.33. the router is an ADSL "modem" and the hub is
> from 3com.
>
> A's kernel has ip_forwarding, firewall, ip_firewall, ip_masquerading, etc
> compiled in. A can ping the router and out past it. it can also ping B
> and other machines in the interior network. our ISP can ping both the
> router and A, but can't ping B (which i expected since B has a private
> address).
>
> B can ping other machines in the interior network and A, but B _cannot_
> ping the router or past it.
>
> i have read the firewall/ip-masquerade/... HOWTOs, but cannot for the
> life of me figure out what it is that i have to do to get packets from
> B to the router successfully.
>
> if anybody can help, please do. the alternative of having to go back
> to using NT is too horrible to contemplate!
>
>
> --
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>
--------------------------------------------------
IPAX Systems
Melbourne, Australia
National Systems Manager
Ops Tel: 03 - 9887-1984
Ops Fax: 03 - 9801-8533
Web Site http://www.ipax.com.au
--------------------------------------------------
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