LinuxQuestions.org
Welcome to the most active Linux Forum on the web.
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Networking > Linux - Wireless Networking
User Name
Password
Linux - Wireless Networking This forum is for the discussion of wireless networking in Linux.

Notices

Reply
 
Search this Thread
Old 11-04-2004, 11:44 AM   #1
jong357
Senior Member
 
Registered: May 2003
Location: Columbus, OH
Distribution: DIYSlackware
Posts: 1,914

Rep: Reputation: 52
Narrowing the IP pool on my Router


I have a quick question. As my topic implies, would this technically make it impossible for anyone to tap into my wireless connection? I have a laptop and a desktop hooked up to the router. If I just assign xxx.xxx.x.2/3 for my DHCP address range and both computers are on-line, would it still be possible for someone to tap into my wireless connection? I have 128bit WEP enabled along with MAC Address filtering but thought it might be nice to really tighten things up a bit... Comments and suggestions welcome...
 
Old 11-04-2004, 04:38 PM   #2
snecklifter
Member
 
Registered: Mar 2004
Location: UK/West Yorkshire/Huddersfield
Distribution: Fedora 7
Posts: 982

Rep: Reputation: 30
Tighten things up a bit??!!

To hack your network I would have to spoof my Mac address and sit outside for however long it takes to gather roughly 2 Gigabytes of data from normal network traffic and then a further however long cracking it. Tighten things up? Well, sure, you can narrow the ip range as your router will scale up from its own (class D) address. Therefore your router will probably be seen as 192.168.2.1 or something like that so if you have three computers then you could safely set the range from .2.2 - .2.8 or something. Make sure you have a password set on your router, upgrade to WPA change the default ip address of your router, change the name of your network every week, read this book:

http://www.amazon.com/exec/obidos/tg...glance&s=books

Have fun!
Regards
Chris

edit: DHCP will not necessarily set .2 and .3 as your computers ip addresses. Use static addresses to get around this ie. set them manually

Last edited by snecklifter; 11-04-2004 at 04:40 PM.
 
Old 11-05-2004, 02:14 AM   #3
jong357
Senior Member
 
Registered: May 2003
Location: Columbus, OH
Distribution: DIYSlackware
Posts: 1,914

Original Poster
Rep: Reputation: 52
Thanks... I was just curious. I did just leave open 2 ip addresses. DHCP on the roter is doing a good job of it to. Didn't mess with any static settings on my computers. Am I right in thinking that even if I disabled WEP and MAC filtering, you still couldn't browse the web? If my router refuses to assign an ip cause both are already taken, then it would seem nigh impossile for neighbors or anyone else to tap in.... I'll have to read up some. Just thinking out loud I suppose...
 
Old 11-05-2004, 01:34 PM   #4
snecklifter
Member
 
Registered: Mar 2004
Location: UK/West Yorkshire/Huddersfield
Distribution: Fedora 7
Posts: 982

Rep: Reputation: 30
Yup, if both computers are always connected and the ip leases are getting renewed each time. When the lease runs out however, the ip is up for grabs again. Event before this a computer can log on and get assigned an ip without too much bother. Basically, restricting ip pools is a very poor way of implementing wireless security. Your WEP/Mac filter combination is far superior. Above that I'd go with WPA.
Regards
Chris
 
Old 11-05-2004, 07:54 PM   #5
kitanokikori
LQ Newbie
 
Registered: Aug 2003
Posts: 6

Rep: Reputation: 0
Even if you narrow DHCP, you can still set a manual IP as long as it fits in the subnet (and you manually set the gateway and DNS) and it'll still work just the same. Your encryption and MAC addresssing is a pretty secure solution, I wouldn't worry about it
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Python - need help narrowing a regular expression rose_bud4201 Programming 2 10-30-2005 12:37 AM
delay pool chamnane Linux - Networking 1 07-23-2004 01:15 AM
Pool (biliard) killer_bunny General 18 12-20-2003 10:56 AM
IP Pool rdkoli Linux - Networking 4 12-19-2003 11:15 PM
Narrowing down MY Desktop Distro choices Paul Parr Linux - Distributions 12 04-27-2003 12:45 AM


All times are GMT -5. The time now is 01:23 PM.

Main Menu
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
identi.ca: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration