Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 195
  • Last Modified:

new outside router ip

Hello I have a client that there isp is changing the outside ip address.
 
Here are the (old and the) new settings for the router and the mail server:
 
old IP address block: 1.1.1.2-127 (subnet 255.255.255.252)
new IP address block: 1.1.1.3-23 (same)
 
old mail server address: 2.2.2.126
new mail server address: 2.2.2..22

how do I accompish they have a cisco 1600 router
 
 
0
eberhardt2329
Asked:
eberhardt2329
1 Solution
 
lrmooreCommented:
Too many "it depends".. we'd need to see the existing config of that 1600 router. Is it doing NAT to the mail server? Does it have access-lists restricing inbound ports to specific addresses? Is the current config using "ip unnumbered Eth0" ?

>old IP address block: 1.1.1.2-127 (subnet 255.255.255.252) <== no way, jose. This mask is not correct

>new IP address block: 1.1.1.3-23 (same) <== not with the above mask..

Basic router config:
router>enable
Password:
router#config t
router(config)#interface serial 0
router(config-if)#ip address <new ip> <mask>


0
 
Dr-IPCommented:
")"
"new IP address block: 1.1.1.3-23 (same)"

That should be

old IP address block: 1.1.1.2-127 (subnet 255.255.255.128)
new IP address block: 1.1.1.3-23 (subnet 255.255.255.224)

0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Tackle projects and never again get stuck behind a technical roadblock.
Join Now