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New IP for 1800 Router running VPN

mtnvictory69
Beginner
Beginner

I have an existing 1800 router that is using NAT and VPN to HQ. I now have a new ISP provider and so now i need to chane the Fastethernet1 IP address. I know how to do that but what else do I need to change to make everything continue to work? Thanks

1 Accepted Solution

Accepted Solutions

1) Your own IP and routing

2) The NAT rule that references the public IP

3) Your ACL FIREWALL

4) Your two VPN-peers need to change the IP in their config (and the PSK because that was visible in your config)

-- 
Don't stop after you've improved your network! Improve the world by lending money to the working poor:
http://www.kiva.org/invitedby/karsteni

View solution in original post

10 Replies 10

1) Your own IP and routing

2) The NAT rule that references the public IP

3) Your ACL FIREWALL

4) Your two VPN-peers need to change the IP in their config (and the PSK because that was visible in your config)

-- 
Don't stop after you've improved your network! Improve the world by lending money to the working poor:
http://www.kiva.org/invitedby/karsteni

Can you please tell me our show me how I would make these changes? Thanks a lot for you're help. The new Outside IP is 70.58.191.193 and the inside IP is 10.0.1.1

Thanks

Michael

Basically you just have to replace your old IP against the new one. Delete the old routes and configure the new as provided by your provider.

-- 
Don't stop after you've improved your network! Improve the world by lending money to the working poor:
http://www.kiva.org/invitedby/karsteni

My next and hopefully last question is how do I remove the line that have the old IP?

Thanks

Michael

I just see, that your router is configured for the new IP (70.58.191.193) that you mention above.

-- 
Don't stop after you've improved your network! Improve the world by lending money to the working poor:
http://www.kiva.org/invitedby/karsteni

Its not in this config but I was just asking how would I delete old lines within my new config.

Thanks

Michael

Its not in this config but

you don't make it really easy to help you ...

Commands that you don't need/want are removed with a "no" in front of the old command. At least most of the times with some exceptions, and there comes your actual config into play ...

-- 
Don't stop after you've improved your network! Improve the world by lending money to the working poor:
http://www.kiva.org/invitedby/karsteni

The line

ip nat inside source static 10.0.1.234 72.16.188.235

What should the last IP be in this line? I was thinking it should be my 70.58.191.198 gateway correct?

Here is the new Config for the router which is going out through the CenturyLink Modem that is configured as a bridge.

Thanks a lot for your help!!

Michael

One more thing please, what command lines do I need to configure the router to use PPPOE and add authentication with an ID and Password. My DSL modem is set to Bridge mode.

Thanks

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