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Old 12-20-2006, 11:05 AM   #1
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Registered: Oct 2005
Location: Lisbon
Distribution: Fedora Core X
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Dhcp Server problem

Hi there..

Im sysadmin, at a university and some students are working whit vmware creating dhcp and dns Servers for a task.

how can i prevent other dhcp or dns servers from been set on the network ?

Blocking the student PC from reaching the network while working on that task (firewall,some policy ??)

thanks in advanced
Old 12-20-2006, 02:06 PM   #2
Registered: Apr 2006
Location: Cape Town, South Africa
Distribution: Gentoo 2006.1(2.6.17-gentoo-r7)
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If you are using active directory, you can make only authoritive dhcp and dns servers "work"
Old 12-20-2006, 02:22 PM   #3
Registered: Aug 2003
Location: Michigan
Distribution: RHEL v.4, Debian
Posts: 82

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Create a separate VLAN and create an ACL to block port 68 and 53 from coming across
Old 12-21-2006, 11:23 AM   #4
Registered: Jun 2002
Location: Netherlands - Amsterdam
Distribution: RedHat 9
Posts: 549

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If someone installs a dns server it can't do much damage. Don't know of a way to block a dhcp server if it is on the same subnet.
Old 12-21-2006, 03:10 PM   #5
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Registered: Oct 2005
Location: Lisbon
Distribution: Fedora Core X
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thanks for the response. ill trie ninja's tip...

when i have a feed back... ill post it...



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