Take the 2-minute tour ×
Server Fault is a question and answer site for professional system and network administrators. It's 100% free, no registration required.

When I asked my what is my static IP leases, I got the reply:

ISP WAN : xxx.xxx.228.117

Customer WAN: xxx.xxx.228.118

Lan IP: xxx.xxx.194.112-127

May I ask What is the ISP WAN and Customer WAN?

Thanks.

share|improve this question

2 Answers 2

up vote 4 down vote accepted

Sounds something like this:

         ISP
          | xxx.xxx.228.117
          |
          |
          | xxx.xxx.228.118/30 (mask 255.255.255.252)
     +----------+
     | your     |
     | router/  |
     | firewall |
     +----------+
          | xxx.xxx.194.113/28 (mask 255.255.255.240)
          |
----------+-----------  your local LAN segment
 xxx.xxx.194.114-126    (mask 255.255.255.240)

The x.x.228.117 and 118 addresses are used on the link between your WAN router (or firewall or whatever it happens to be) and your ISP.

Since they've specified the range of .112-.127 for the LAN, I'm assuming that's actually the xxx.xxx.194.112/28 subnet. The first address of the subnet (.112) is the network address, so you can't assign it. The last address (.127) is the broadcast address, so you can't assign it either. You need to assign one of the addresses in that range to the LAN interface of your router/firewall (I've chosen .113 in the diagram). That leaves you with 13 addresses that you can actually use to assign to hosts (.114-.126).

The default gateway of your hosts would be configured as xxx.xxx.194.113. The default gateway of your router/firewall would be configured as xxx.xxx.228.117. That way the hosts know to use your router to get to the Internet, and your router knows to use your ISP to get to the Internet.

share|improve this answer
    
ASCII art FTW! Party like it's 1989. –  Wesley Jan 1 '11 at 6:52

The "ISP WAN" is your ISP's gateway address. It will act as the upstream gateway for your router. The "Customer WAN" is your router's external IP address. The "LAN IP" is the publicly-routable network block to assign to your hosts behind the router.

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.