Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /home/question/public_html/index.php:1) in /home/question/public_html/index.php on line 2

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/question/public_html/index.php:1) in /home/question/public_html/index.php on line 2
Questionville.com - Technology - Security - Best way to lock down network from rogue computers

Warning: strtotime() [function.strtotime]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/New_York' for 'EST/-5.0/no DST' instead in /home/question/public_html/scripts.php on line 1574

Warning: strtotime() [function.strtotime]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/New_York' for 'EST/-5.0/no DST' instead in /home/question/public_html/scripts.php on line 1574

Warning: strtotime() [function.strtotime]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/New_York' for 'EST/-5.0/no DST' instead in /home/question/public_html/scripts.php on line 1574

Warning: strtotime() [function.strtotime]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/New_York' for 'EST/-5.0/no DST' instead in /home/question/public_html/scripts.php on line 1574

Warning: strtotime() [function.strtotime]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/New_York' for 'EST/-5.0/no DST' instead in /home/question/public_html/scripts.php on line 1574

Warning: strtotime() [function.strtotime]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/New_York' for 'EST/-5.0/no DST' instead in /home/question/public_html/scripts.php on line 1574

Warning: strtotime() [function.strtotime]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/New_York' for 'EST/-5.0/no DST' instead in /home/question/public_html/scripts.php on line 1574

Warning: strtotime() [function.strtotime]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/New_York' for 'EST/-5.0/no DST' instead in /home/question/public_html/scripts.php on line 1574

Warning: strtotime() [function.strtotime]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/New_York' for 'EST/-5.0/no DST' instead in /home/question/public_html/scripts.php on line 1574
Top Answers


Please try not to post duplicate answers... if you see an answer that you want to post, just add a vote to it and you can add a note as well. Thank You
3

0
Smart Switches
Submitted By: anon ( 312 days, 12 hours, 8 minutes ago )
IF you have a smart switch, you can deactivate ports and only have ports open for a certian mac address. I believe any of the higher cisco models will do this fine. But the "dumb" switches will not do this. This does however require knowing every mac address and physical port that they are on.
1

0
Sounds like wired...
Submitted By: L0t3k ( 312 days, 11 hours, 56 minutes ago )
You said "plugging in", so I assume you mean a wired network. You can control what IP's people get according to their mac address via the DHCP server. Set up reservations on the network for authorized users. If the person is going through the trouble of finding the MAC of a target machine and spoofing their MAC to snag the reservation and bounce someone, you'll probably want to implement a gateway sort of authentication for every user. You'll often see solutions like this on large school campuses... and FOSS options exist for it.
1

0
Mac Filtering and a locked closet.
Submitted By: Beamsjr ( 312 days, 2 hours, 21 minutes ago )
I would definetly use mac filtering on the wireless, and as far as people pluging in to the router, keep it in a locked closet.
0

0
more info needed
Submitted By: anon ( 312 days, 12 hours, 11 minutes ago )
if this is a wireless network, setup WPA encryption to keep unwanted people off. if it is not a wireless network how are they going to plug in without you knowing? then just unplug them. a router handles all ip address assignments.
0

2
Wireless
Submitted By: vettelovr ( 312 days, 12 hours, 1 minute ago )
If you are using a wireless setup, see if you can turn off the dhcp in its settings, and manually assign the addresses
Submitted By: anon
but if someone gets the same address as one on the current network it will boot that person off.
Submitted By: vettelovr
Sorry, I should have also put in that you would need to change the router's settings to use another range of IP's other than the default 192.168.xxx.xxx that they all use.  To anon: yes, your computer would be booted if someone else got the same address as you, but if dhcp is turned off, then they would have to know what IP, gateway, etc to assign, and the odds of them happening to assign the same address as I already have are pretty slim
0

0
Any one or more of the following will work
Submitted By: Marjon ( 312 days, 11 hours, 1 minute ago )
As per the other posts, depending on if this is a wired or wireless network you've essentially got 3 options: