• RSS
  • Twitter
  • FaceBook

Security Forums

Log in

FAQ | Search | Usergroups | Profile | Register | RSS | Posting Guidelines | Recent Posts

More IP's need on internal network

Users browsing this topic:0 Security Fans, 0 Stealth Security Fans
Registered Security Fans: None
Post new topic   Reply to topic   Printer-friendly version    Networking/Security Forums Index -> Networking

View previous topic :: View next topic  
Author Message
Chickendog
Just Arrived
Just Arrived


Joined: 07 Jun 2006
Posts: 0


Offline

PostPosted: Fri Sep 16, 2011 10:15 pm    Post subject: More IP's need on internal network Reply with quote

I am a subnetmasking dumby.

My current internal network is 10.0.1.x with a subnet mask of 255.255.255.0.

I am running out of IP's on this network. I have sonicwall firewall that i think i can uses as a router but am not 100 percent sure. I could setup multiple networks to reduce the traffic and seperate servers from users. Or I could put a router in between the firewall and the users and servers.

What is the general rule of thumb when you run out of IP's on simple network?

Thanks for your reading time.
Back to top
View user's profile Send private message Visit poster's website
AdamV
SF Mod
SF Mod


Joined: 06 Oct 2004
Posts: 24
Location: Leeds, UK

Offline

PostPosted: Sun Sep 18, 2011 5:26 pm    Post subject: Reply with quote

No routing required, just make your subnet bigger.

Change your subnet mask to 255.255.0.0 so you get 65,534 hosts instead of 254 - each unique combination of the last two octets (8-bit binary 'groups' / decimal digits in an IP address) will then be a unique host on your 10.0.x.x network.

Obviously do this with lots of caution and sense checking first, make sure your existing routers are reconfigured to handle this before changing any DHCP scopes etc.

10.0.1.x (aka 10.0.1.0/24) is just one sub-network of 10.0.x.x (aka 10.0.0.0/16), so all you are doing really is moving the boundary outwards to a bigger range while leaving the existing IPs in place. You can then change your DHCP and static addresses to suit you.

You may want to use some addresses for specific purposes to make life easier while everything is still in a single subnet eg:
10.0.1.x = servers and network devices
10.0.2.x = printers and other static IPs
10.0.10.x - 10.0.20.x = DHCP clients
Back to top
View user's profile Send private message Visit poster's website
capi
SF Senior Mod
SF Senior Mod


Joined: 21 Sep 2003
Posts: 16777097
Location: Portugal

Offline

PostPosted: Wed Sep 21, 2011 1:58 pm    Post subject: Reply with quote

To compliment AvamV's good advice, you may find the following primer of help in understanding subnetting:
Subnetting Chart (Good for Exams)
Back to top
View user's profile Send private message
PhiBer
SF Mod
SF Mod


Joined: 11 Mar 2003
Posts: 20
Location: Your MBR

Offline

PostPosted: Tue Oct 18, 2011 6:02 am    Post subject: Reply with quote

And in this day and age, here is a great subnet calculator to do the work for you . Wink
Back to top
View user's profile Send private message
Display posts from previous:   

Post new topic   Reply to topic   Printer-friendly version    Networking/Security Forums Index -> Networking All times are GMT + 2 Hours
Page 1 of 1


 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum

Community Area

Log in | Register