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Re: Firewall & Routing - help!



Thanks for the reponses by everyone. I've combined the ideas, done the following with the following results.

> a)  make a route in 192.168.50.1 that routes traffic for 192.168.5.0 to
> your IP of 192.168.50.48...  This will allow your gateway server/router
> to route packets to this additional network properly.

Done, set a route on 50.1 to 5.0 (test environ is a linksys BEFSR41, live will be Symantec/Raptor fw).

> And you need to turn on packet forwarding on the box that is routing between subnets to do that.
> Edit /etc/sysctl.conf changing ip_forward on:
> net.ipv4.ip_forward = 1
> Then apply the change with the following command:
> sysctl -p


Ok, edited the value of net.ipv4.ip_forward to true. Please note, when I execute a network restart I see the following...

   Shutting down interface eth0:                              [  OK  ]
   Shutting down interface eth1:                              [  OK  ]
   Shutting down loopback interface:                          [  OK  ]
   Disabling IPv4 packet forwarding:                          [  OK  ]

I'm not sure where the IPv4 packet forwarding dissable is comming from.

> When you have multiple devices like this, each device should have its gateway for the local network (or no gateway if *it*
is the gateway)

Edited eth1 with gateway blank.


> then you should have a statement like this in your /etc/sysconfig/network file:
> GATEWAYDEV=eth0


Added.

>  NOW, try pinging 192.168.5.200 from 192.168.50.48... You should get
>  responses back.  If so, try 192.168.5.3 next.

******** I've turned off the fw to test the routing.

Ok, I can ping from the firewall both ways, machine from one subnet to the other, and vice versa.
I can access my internal web server just fine. I get dns results from internal dns server etc.... so I'm bridging the subnets now.


I however, CAN NOT get out of my 50.x subnet to the internet from the firewall, and from the machine at 5.3.

[root choke root]# ping www.groklaw.net
connect: Network is unreachable

Also, where are the default routes, etc.. stored in RH/FC1? When I first boot, I've got some crazy routes from playing around before....

btw, here is my routing table

Destination Gateway Genmask Flags Metric Ref Use Iface
172.20.5.0 * 255.255.255.0 U 0 0 0 eth1
192.168.5.0 * 255.255.255.0 U 0 0 0 eth1
192.168.50.0 * 255.255.255.0 U 0 0 0 eth0
169.254.0.0 * 255.255.0.0 U 0 0 0 eth1
127.0.0.0 * 255.0.0.0 U 0 0 0 lo
[root choke root]#


Dunno what hte 169.254 is, or where its comming from.


My route on the bastion fw (50.1) appears to be ok.



All most there! Thanks!





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