topic OSPF through a PIX in Network Security

OSPF through a PIX

r-lucarelli — Fri, 21 Feb 2020 06:04:19 GMT

I need to separate a OSPF area 0 with a firewall, becouse now some WAN connection are provided by a carrier in MPLS. I would like connect this WAN router outside the firewall, however I need also to extend the routing protocol OSPF to WAN. How I can do it? An other possibility is to use BGP, in this case is easy becouse BGP use TCP session.

Thanks

Roberto

Re: OSPF through a PIX

bzink — Wed, 22 May 2002 11:32:04 GMT

If you choose to use OSPF, you'll need to form an OSPF adjacency between the routers, so you'll want to use a GRE tunnel through the Pix. Beware of recursive routing as described in:

http://www.cisco.com/warp/public/105/gre_flap.html

You can use BGP and redistribute into OSPF, but convergence will not be as fast.

Re: OSPF through a PIX

r-lucarelli — Wed, 22 May 2002 12:57:22 GMT

Thanks. the link will be useful

Roberto