Whats the norm for IP addressing?

.1-.9 I've always reserved for servers
.10-.250 for users
.250-.254 for routers/NAS

Is this anywhere close to convention? Someone point me toward convention

2/19/2011 12:09:56 PM

If anything, I'd say the first IP of a subnet is often the gateway (.1 for a /24).

On a /24 LAN I often see .100 and up being used for dynamic assignments (users) and .2-99 for static assignments.

But, there really is no right or wrong answer as long as the people who need to know understand, and you make some documentation if more than one person needs to know.

2/19/2011 12:25:56 PM

I've seen several different organizations do shit differently. Come up with a scheme, and apply it uniformly throughout the infrastructure.

2/19/2011 1:20:34 PM

yea forgot about the gateway

I like the come up with your own and document it scheme...

Thanks guys!

2/19/2011 1:50:08 PM

Quote :

"But, there really is no right or wrong answer as long as the people who need to know understand, and you make some documentation if more than one person needs to know."

/thread

2/19/2011 3:49:39 PM

Quote :

"On a /24 LAN I often see .100 and up being used for dynamic assignments (users) and .2-99 for static assignments."

I've always used .100 and up for both purposes, just adding static assignments to the reservation table for my own devices.

[Edited on February 19, 2011 at 4:42 PM. Reason : but this is a home network

2/19/2011 4:42:25 PM

Ive seen both wwwebsurfer's and mellocj's setups. Normally I do .1 as gateway and static stuff is something I can remember when I am setting up servers and other static devices, but a lot of network experts will pick weird gateways for anti DDoS purposes since DHCP will tell everyone the gateway, or its static set.

2/20/2011 8:34:13 AM

Can't any malicious entity in the network programmatically read the default gateway from ifconfig (non-Windows) or ipconfig (Windows)?

2/20/2011 2:54:17 PM

^If you have that kind of access to a machine on the network, yes.
If you're on the network, you can also just sniff traffic and look at various pieces of broadcast traffic and usually figure it out. It just depends on how the network is set up.

2/20/2011 4:50:01 PM

^^, ^

Agreed- arp traffic would pretty quickly reveal what the gateway IP address is, assuming most flows are inter-subnet and not intra-subnet.

2/22/2011 12:07:08 PM

2/22/2011 12:58:25 PM

geez stargate command needs a lot of IP's

wtf are they running?

2/22/2011 1:51:13 PM

"50th space wing"

2/27/2011 1:01:07 AM