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Old 09-10-2003, 08:34 AM   #1
Registered: Aug 2003
Location: Berlin, Germany
Distribution: SuSE 9, WinXP/2000
Posts: 35

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got a little question
if you've a intranet with the IP-adresses

all with subnetmask

what can I do, that an admin can see all PCs
(192.168.2.XX to 19.XX)
but that the 2.XX, 3.XX and so on just stay in their ranges ...
that one from 2.XX just can see all other in 2.XX but not in 3.XX or 5.XX or 19.XX

do I just have to change the subnet-masks - for admin and for the rest?
Old 09-10-2003, 09:57 AM   #2
Registered: May 2003
Location: Lisbon Falls, Maine
Distribution: RH 8.0, 9.0, FC2 - 4, Slack 9.0 - 10.2, Knoppix 3.4 - 4.0, LFS,
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Just changing your subnet mask like that could cause you some problems, especially if you are down stream from a router. Just so I understand what you are saying, you have multiple subnets, and want to limits systems on each subnet to seeing only their own subnet, but you want an admin to be able to see all subnets?

Old 09-10-2003, 10:45 AM   #3
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Location: Montreal, Quebec, Canada
Distribution: RedHat, Fedora, CentOS, SUSE
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You are describing a VLAN.

A VLAN can be setup using a switch and a router (or a switch/router).
It seperates subnets and isolates them from each other. The only way to communicate between VLANs is through a router.
Old 09-10-2003, 11:16 AM   #4
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What Mathieu said is correct. You can't just change the subnet mask on the PC's to make them see each other etc...

If you did that they would no longer be on the proper VLAN.

Router is needed here
Old 09-11-2003, 04:11 AM   #5
Registered: Aug 2003
Location: Berlin, Germany
Distribution: SuSE 9, WinXP/2000
Posts: 35

Original Poster
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btw: yeah, slight, that what i'm talking about


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