2 ways to do this: 1: Run GATED on the linux box and have it participate in OSPF, you will have to switch your AREA assignement around etc.. but that is probably the best way to do it... 2: If you want the firewall to pass OSPF traffic, you will have to use the "neighbor" command in OSPF to explicitly define your neighbors since they won't respond to 224.0.0.5 (firewall blocks it). Since there are different subnets on each side of the firewall, you will have to create incoming and outgoing static NAT translations so it will appear that the ospf neighbors are local.. option 1 is probably the best.. hope that helps Russ.. "yudaocai" <[EMAIL PROTECTED]> wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > all hi! > > I the middle of the routers running OSPF ,I place a firewall in the it ; > the firewall is a linux with multiple NIC ,IP-forwards is open in the kernel,and not rip. > 1��how do they (the lan )communicate ? how can I do ? > 2��can the routing table update from the firewall? > > > > > yudaocai > [EMAIL PROTECTED] > > _________________________________ > FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > _________________________________ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]

