Re: racoon works only in one way

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I'm seeing something possibly similar.

I have upgraded a Fedora 11 box to Fedora 14. This box was succesfully 
running five
IPSec tunnels. Four of them to a ZyXEL P-2602H, one to Fedora 13 box.

After upgrading, all of the tunnels were reestablished, but no traffic 
was possible over it.

Using Wireshark I found out that packets returning from a remote host are
being routed to the wrong interface.

Let's say I have this:

SRC=1.2.3.4 (public, on eth1)
SRCNET=192.168.1.0/24 (private, on eth0)
DST=5.6.7.8 (public)
DSTNET=192.168.2.0/24 (private)

While pinging from our 192.168.1.217 to their 192.168.2.16, I see
- unencrypted packet arrives at our tunnel
- encrypted packet is sent to DST
- (not tracing remote internal network, assuming everything's OK)
- encrypted return packet arrives at SRC
- unencrypted return packet is sent to eth1, even though destination 
address is 192.168.1.217

There's nothing in the routing table that could explain this.

Pim

On 4-1-2011 11:50, Luc MAIGNAN wrote:
> Hi,
>
> I use racoon to establish an IPSEC tunnel between a fedora box and a router.
>
> The tunnel is mounted.
>
> Both my fedora and network behind the router can ping each other
>
> The network behind the router can use the tunnel to ssh my fedora
>
> But my fedora isn't able to ssh the network behind the router.
>
> IPTRAF shows me that packets come correctly from the opposite side, but
> ssh doesn't seem to receive them.
>
>
> What can happen ?
>
> Any help would be appreciated
>
> BR
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