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Re: [FW1] Re-Routing VPN Traffic
Larry Pingree wrote:
> Hmm.. I think the only way to do this would be fully meshed. Anyone else
> have any ideas on this one?
T.Higgins wrote:
> We have a similar problem - although ours is made worse by the fact that
> the single connection point in our case is running on a Nortel VPN box:-
>
> SiteA - - CPpointVPN - - Site B - - Nortel VPN - - Site C
>
> SiteA to B no problem, Site B to C no problem, Site A to C doesn't work -
> get dest unreachable from traceroute (from an ISP router) but can't see
> any obvious routing config errors at our end.
>
> Any ideas on our situation would help.
Since I connected a second leaf site through another VPN box (cisco) last
week, I got some new experiences on this.
I _is_ possible to re-route VPN-traffic through several tunnels, but you
have to mess around with the encryption domain settings. Here is what one
is supposed to do in my example:
Site D (new)
10.30/21
+------+
| |
+------+
:
:
:
:
+------+
| | Site A
+------+ 10.31/21
/\
/ \
/ \
/ \
/ \
/ \
/ \
+------+ +------+
Site B | |------| | Site C
10.32/21 +------+ +------+ 10.33/21
- Define Site A and D to be the ED of Site A at Site B
- Define Site A and D to be the ED of Site A at Site C
- Define Site A, B and C to be the ED of Site A at Site D
- At Site A define the original ED for each other Site
Be aware, that re-routing through multiple tunnels doesn't increase
round-trip-times and reliabilty. And it is a horrible task to maintain such
a VPN when different administrators are involved... ;)
Perhaps someone knows a kind of Design-Guide for large VPNs. Didn't find
something like this on checkpoint.com :(
Bye, Elchy
Disclaimer: I'm not absolutely sure that above configuration is working. My
own VPN looks somewhat different and includes devices of other
manufacturers. Please correct me, if I'm wrong.
--
A. Eltrich - mailto:[email protected]
LAN/WAN System Engineer - http://www.inotronic.de/
inotronic Computers GmbH - Pfaelzer-Wald-Str. 70
D-81539 Muenchen - Tel: +49-89-439007-0 - Fax: -41
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