[Ilugc] net.ipv4.ip_forward
- From: mohan.tux@xxxxxxxxx (Mohan Sundaram)
- Date: Tue Sep 1 08:59:15 2009
On Mon, Aug 31, 2009 at 8:19 PM, Girish
Venkatachalam<girishvenkatachalam@xxxxxxxxx> wrote:
On Mon, Aug 31, 2009 at 3:35 PM, Ashish Verma<ashishverma1984@xxxxxxxxx>
wrote:
Now to answer your question after all this digression, you don't need
this sysctl for forwarding/routing for ping to work.
Not unless you have a proxy running for ping on the machine common to
the two networks.
You are barking up the wrong tree.
How is that? Is ICMP a non-IP packet for it to be routed even if
ip_forward is 0?
Normally it is very rare that you set this sysctl. You do it if you are a
?firewall or a proxy or if you are running squid.
Let us address this specific question. I read what you are saying as -
A can ping C via B using static routes on A and ip_forward to 0 in B?
A-----------------------------B---------------------C
That is wrong. When a packet arrives to a box, if the destination is
not local, the packet should be forwarded. This forwarding will happen
only if the ip_forward flag is set to 1.
OP has also remained silent so far on whether his question was answered.
Mohan Sundaram
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