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SubjectRe: multi-homed host networking weirdness
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In article <19980831165228Z154723-17700+2616@vger.rutgers.edu>,
Jonathan Corbet <corbet@eklektix.com> writes:
> Here's a problem I've been seeing for a while; I just verified that 2.1.119
> still has it, so I'll send it in while it's fresh.

> The system in question has two network cards (3c905's, but I doubt that
> matters), each on a separate class C subnet (call them 78 and 80). No
> routing daemon is running; there is a simple default route on the .80
> subnet. In general, everything works great, except:

> If you try to access the 78 interface, no responses ever come back. 78
> works great for other machines on that subnet, but it can not be accessed
> from any other network. This create problems when trying to access the
> host from outside the local nets; if DNS puts the 78 address first,
> attempted connections will time out and fail.

> This network also has a number of multi-homed Solaris hosts which deal
> correctly with access to any interface.

Try echo 0 > /proc/sys/net/ipv4/*/rp_filter


-Andi

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