strange IP

sang_froid · 11-08-2009, 10:17 AM

Hi,

Are these valid IP which can be assigned to a server ?

202.51.0.254
202.51.0.10

What do you say ? there is 0 in the third octet...i am confused..

maslik · 11-08-2009, 10:27 AM

In my opinion there may be zero in the third octet, but this IP is not the private one. If this is not an intension you should use 10.0.0.0 – 10.255.255.255 for example.

pcunix · 11-08-2009, 01:52 PM

It's "legal", but it's confusing because if this is subnetted as Class B the network is 202.51.0.0 and is also that for class A.

Note that our pals at the Borg screwed this up once: http://support.microsoft.com/kb/272617

As Maslik said, you should use private ip ranges inside your network. 10., 192.168, 172.16 to 172.31

I can't tell you how much money I've made over the years renumbering networks that didn't use private ip's to start with. It was extremely common even just 10 years ago because a lot of people just didn't know any better. Nowadays appliance routers usually default to a private range so I see less of it, but it still comes up now and then.

sang_froid · 11-09-2009, 08:20 AM

I didn't get you clearly. Is it possible to explain a bit.

The thing which I am confused with is, I have never seen any IP with 0..but this one has...so made me confused...

Quote:

Originally Posted by pcunix

It's "legal", but it's confusing because if this is subnetted as Class B the network is 202.51.0.0 and is also that for class A.

Note that our pals at the Borg screwed this up once: http://support.microsoft.com/kb/272617

As Maslik said, you should use private ip ranges inside your network. 10., 192.168, 172.16 to 172.31

I can't tell you how much money I've made over the years renumbering networks that didn't use private ip's to start with. It was extremely common even just 10 years ago because a lot of people just didn't know any better. Nowadays appliance routers usually default to a private range so I see less of it, but it still comes up now and then.

pcunix · 11-09-2009, 08:26 AM

You've never seen one because most people wouldn't do that.

I think it's as simple as that.

pixellany · 11-09-2009, 08:28 AM

What exactly don't you understand? "0" is legal in an IP address, if that's the question.

Have you looked at---e.g.---this:
http://en.wikipedia.org/wiki/IPv4