Re: [LARTC] Routing public IP's through a gateway
On Sunday 14 October 2007 11:07:10 pm Tim Groeneveld wrote: Greeting all, I have a bit of a complicated question. I have two ethernet devices, eth1 and eth2. eth1 is where my internet comes from. It is in the form of 202.172.122.208/29. It has another IP range, 202.172.122.72/29. What I want to be able to do is route 202.172.122.72/29 to eth2, so that other machines can use those IPs, any ideas on how to do this, I cannot work out how to do this. eth2 has a DHCP server, which only gives out IPs 202.172.122.74 to 202.172.122.76. eth1 is basically just hooked into my internet router, while eth2 is hooked into a switch, and will be used for other computers. If anyone could help me with this setup, I would more then appreciate it. Thank you very much, - Tim Groeneveld To extend what I have tried to say further: My ISP has given me two IP ranges. 202.172.122.208/29 and 202.172.122.72/29. They are unable to give me any larger IP ranges for some lame excuse, which I am sure was written by the BOfH. Does your isp route 202.172.122.72/29 to me? Why yes it does. It routes this IP through the gateway 202.172.122.209. If I want to give a machine an IP in 202.172.122.72/29, this is what I need A machine already in the 202.172.122.208/29 IP range. ip route add 202.172.122.72/29 via 202.172.122.209 dev eth1 ifconfig eth1 202.172.122.73 netmask 255.255.255.248 (where on this machine, eth1 is hooked into my router). What I would like, is a gateway machine, which will use eth2 to provide a gateway for other machines to assign themselves .72/29 IP's, *without* the need of 202.172.122.209 being in the route table. So, there would be *one* gateway machine. This gateway machine has (already) an IP on both ranges. 202.172.122.211 (eth1) 202.172.122.74 (eth2) eth2 would then be connected into a switch, and eth1 into the internet router. I am not sure if this helps at all, sorry if it does not. Thanks again, - Tim G signature.asc Description: This is a digitally signed message part. ___ LARTC mailing list LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
RE: [LARTC] Routing public IP's through a gateway
Hi, Sounds to me like you don't actually need to do anything - just enable IP forwarding on the linux machine (the gateway - usually something like echo 1 /proc/sys/net/ipv4/ip_forward), and point your 202.172.122.7x machines at 202.172.122.74 for their default gateway (which your DHCP server should be passing out as a dhcp option anyway). Unless I have missed something in the question? Dan -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Tim Groeneveld Sent: 15 October 2007 13:15 To: lartc@mailman.ds9a.nl Subject: Re: [LARTC] Routing public IP's through a gateway On Sunday 14 October 2007 11:07:10 pm Tim Groeneveld wrote: Greeting all, I have a bit of a complicated question. I have two ethernet devices, eth1 and eth2. eth1 is where my internet comes from. It is in the form of 202.172.122.208/29. It has another IP range, 202.172.122.72/29. What I want to be able to do is route 202.172.122.72/29 to eth2, so that other machines can use those IPs, any ideas on how to do this, I cannot work out how to do this. eth2 has a DHCP server, which only gives out IPs 202.172.122.74 to 202.172.122.76. eth1 is basically just hooked into my internet router, while eth2 is hooked into a switch, and will be used for other computers. If anyone could help me with this setup, I would more then appreciate it. Thank you very much, - Tim Groeneveld To extend what I have tried to say further: My ISP has given me two IP ranges. 202.172.122.208/29 and 202.172.122.72/29. They are unable to give me any larger IP ranges for some lame excuse, which I am sure was written by the BOfH. Does your isp route 202.172.122.72/29 to me? Why yes it does. It routes this IP through the gateway 202.172.122.209. If I want to give a machine an IP in 202.172.122.72/29, this is what I need A machine already in the 202.172.122.208/29 IP range. ip route add 202.172.122.72/29 via 202.172.122.209 dev eth1 ifconfig eth1 202.172.122.73 netmask 255.255.255.248 (where on this machine, eth1 is hooked into my router). What I would like, is a gateway machine, which will use eth2 to provide a gateway for other machines to assign themselves .72/29 IP's, *without* the need of 202.172.122.209 being in the route table. So, there would be *one* gateway machine. This gateway machine has (already) an IP on both ranges. 202.172.122.211 (eth1) 202.172.122.74 (eth2) eth2 would then be connected into a switch, and eth1 into the internet router. I am not sure if this helps at all, sorry if it does not. Thanks again, - Tim G ___ LARTC mailing list LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
Re: [LARTC] Routing public IP's through a gateway
On Sun, Oct 14, 2007 at 11:07:10PM +1000, Tim Groeneveld wrote: Greeting all, I have a bit of a complicated question. I have two ethernet devices, eth1 and eth2. eth1 is where my internet comes from. It is in the form of 202.172.122.208/29. It has another IP range, 202.172.122.72/29. What I want to be able to do is route 202.172.122.72/29 to eth2, so that other machines can use those IPs, any ideas on how to do this, I cannot work out how to do this. You haven't made it too clear what exactly you are trying to do, from what i gather this should work on your linux box ip route add 202.172.122.72/29 dev eth2 Does your isp route 202.172.122.72/29 to you ? eth2 has a DHCP server, which only gives out IPs 202.172.122.74 to 202.172.122.76. eth1 is basically just hooked into my internet router, while eth2 is hooked into a switch, and will be used for other computers. If anyone could help me with this setup, I would more then appreciate it. Thank you very much, - Tim Groeneveld -- Need hosting for your next Open Source project? why not try ShareSource? www.sharesource.org ___ LARTC mailing list LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc signature.asc Description: Digital signature ___ LARTC mailing list LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
Re: [LARTC] Routing public IP's through a gateway
Alex Samad wrote: On Sun, Oct 14, 2007 at 11:07:10PM +1000, Tim Groeneveld wrote: Greeting all, I have a bit of a complicated question. I have two ethernet devices, eth1 and eth2. eth1 is where my internet comes from. It is in the form of 202.172.122.208/29. It has another IP range, 202.172.122.72/29. What I want to be able to do is route 202.172.122.72/29 to eth2, so that other machines can use those IPs, any ideas on how to do this, I cannot work out how to do this. You haven't made it too clear what exactly you are trying to do, from what i gather this should work on your linux box *cannot agree more*. Topology and better expression of scenario requiring this helps always. This may be a convoluted solution to a simple problem. I must add we are operating in relative vaccum here. ip route add 202.172.122.72/29 dev eth2 Does your isp route 202.172.122.72/29 to you ? eth2 has a DHCP server, which only gives out IPs 202.172.122.74 to 202.172.122.76. seems to be outside subnet cited. *.72/29 is .72-.75* Only 2 addresses can be served on DHCP from a subnet of 4. eth1 is basically just hooked into my internet router, while eth2 is hooked into a switch, and will be used for other computers. If anyone could help me with this setup, I would more then appreciate it. Thank you very much, - Tim Groeneveld You seem to want to use public IP addresses against mapping public to private addresses. If so, why not just connect the router to the switch and connect all computers to the switch? Will also be better to get a combined /28 subnet. No private addresses? No need for firewall? I would use the Linux machine to map the public addresses to private addresses for specific services to a DMZ. Mohan ___ LARTC mailing list LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
Re: [LARTC] Routing public IP's through a gateway
Mohan Sundaram wrote: Alex Samad wrote: ip route add 202.172.122.72/29 dev eth2 Does your isp route 202.172.122.72/29 to you ? eth2 has a DHCP server, which only gives out IPs 202.172.122.74 to 202.172.122.76. seems to be outside subnet cited. *.72/29 is .72-.75* Only 2 addresses can be served on DHCP from a subnet of 4. Pl ignore. I'm wrong. Early morning fogginess. Mohan ___ LARTC mailing list LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
