Web Hosting Talk : Web Hosting Main Forums : Dedicated Server : Need help regarding network routing

[kohkindachi]

Hey Guys I've been using the method below so that this IP (195.122.131.0) will always be connect to eth0:0's IP

route add -net 195.122.131.0 gw 94.xx.xx.254 netmask 255.255.255.0 dev eth0:0

But it only works for port80 of 195.122.131.0 (i think). How do i do it for other port like 443?

Thanks alot (I'm willing to pay $10 to those who help me)

[atlasnetworkseric]

You can't do this (at all) with routing. You could create an IPTables forwarding rule, though...

You should be able to cobble together what you need from this page:

http://www.cyberciti.biz/faq/linux-p...with-iptables/

[kohkindachi]

I've no idea how to dit I'll be paying someone who can help me

[rds100]

Doing this with "dev eth0:0" is not the right way to do it.
Try this:

ip route add 195.122.131.0/24 via 94.xx.xx.254 src y.y.y.y

where y.y.y.y is your IP that you want to use to reach that subnet.

[kohkindachi]

Hi, I tried but

[root@ns208842 ~]# ip route add 195.122.131.0/24 via 94.xx.xx.254 src 178.xx.xx.255
RTNETLINK answers: File exists

[rds100]

Ok, then, try this:

ip route del 195.122.131.0/24
ip route add 195.122.131.0/24 via 94.xx.xx.254 src 178.xx.xx.255
ip route flush cache

and see if it helps

[rds100]

By the way if your IP really ends with .255 this may cause all kind of problems to you.

[kohkindachi]

Originally Posted by rds100

Ok, then, try this:

and see if it helps

Hi thanks. that /24 works for port 443?

[rds100]

It doesn't care about ports. All connections to 195.122.131.0/24 should be initiated with the specified source address, no matter the ports.

[kohkindachi]

Thanks alot I'll try. But how can i check all/delete entry?

[rds100]

ip route
to list the routing table
ip route add ... to add entry
ip route del ... to delete

But be careful - don't delete your defaultroute

[kohkindachi]

Ok I saw it. BTW will this work
ip route add 195.122.0.0/24 via 94.xx.xx.254 src 178.xx.xx.255 ?
I want it to be effective for 195.122.XX.XX, or 195.XX.XX.XX. How can i do it?
Sorry I'm really lousy at all these

[rds100]

195.122.x.x is 195.122.0.0/16 (=netmask 255.255.0.0)
195.x.x.x is 195.0.0.0/8 (=netmask 255.0.0.0)

But that IP ending with .255 is goind to cause you problems.

[kohkindachi]

Hi bro check your PM

[atlasnetworkseric]

Restating the problem:

You want a specific host (195.122.131.0) to always connect to your server's eth0:0 IP.

You -cannot- control the IP that the host connects to with the route command on the server. The host is going to connect to whatever IP it wants on your server. The only thing you can do is redirect, using IPTables, all the traffic from that host to the subinterface you want it to go to.