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Blocking client to client communication

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Michael_D
Advisor

Blocking client to client communication

I have an setup with several 2610 and 2626/2650 classroom switches connected to 2910al edge switches with a central 5412zl "core switch".

Lately we have seen a lot of client to client communiation - Mostly multiplayer games being played at classroom workstations.

Anyone with an soluation that blocks client to client communiation both at classroom switches and at the edge/core level?


Regards

Michael
5 REPLIES
abdullah shboull
Frequent Advisor
Solution

Re: Blocking client to client communication

Dear, you have to implement an ACL to inter-VLAN security routing. If you not familiar in the configuring ACL, you can send the IP scheme and Iâ ll help you.
Pieter 't Hart
Honored Contributor

Re: Blocking client to client communication

I assume the workstations are domain-members?
You can create a policy that configures the firewall on the workstations, not to allow these protocols.

And set permissions so the user cannot change the firewall config offc ourse.

Paulen
Regular Advisor

Re: Blocking client to client communication

What you would need here is something similar to private vlan, upstream forwarding or port protection. I think early HP switches had some kind of feature on this - but I can't find it in the later models. We had to exchange HP for another vendor because of this obvious lack of functionality.
Robert E Simpson
Occasional Visitor

Re: Blocking client to client communication

Use the Filter Source Ports fuctionality.
An example that I use in Hospitality settings is as follows for a 48 + port switch with the 49 and up ports as uplinks.

filter source-port 1 drop 2-48
filter source-port 2 drop 1,3-48
filter source-port 3 drop 1-2,4-48
filter source-port 4 drop 1-3,5-48
filter source-port 5 drop 1-4,6-48
filter source-port 6 drop 1-5,7-48
filter source-port 7 drop 1-6,8-48
filter source-port 8 drop 1-7,9-48
filter source-port 9 drop 1-8,10-48
filter source-port 10 drop 1-9,11-48
filter source-port 11 drop 1-10,12-48
filter source-port 12 drop 1-11,13-48
filter source-port 13 drop 1-12,14-48
filter source-port 14 drop 1-13,15-48
filter source-port 15 drop 1-14,16-48
filter source-port 16 drop 1-15,17-48
filter source-port 17 drop 1-16,18-48
filter source-port 18 drop 1-17,19-48
filter source-port 19 drop 1-18,20-48
filter source-port 20 drop 1-19,21-48
filter source-port 21 drop 1-20,22-48
filter source-port 22 drop 1-21,23-48
filter source-port 23 drop 1-22,24-48
filter source-port 24 drop 1-23,25-48
filter source-port 25 drop 1-24,26-48
filter source-port 26 drop 1-25,27-48
filter source-port 27 drop 1-26,28-48
filter source-port 28 drop 1-27,29-48
filter source-port 29 drop 1-28,30-48
filter source-port 30 drop 1-29,31-48
filter source-port 31 drop 1-30,32-48
filter source-port 32 drop 1-31,33-48
filter source-port 33 drop 1-32,34-48
filter source-port 34 drop 1-33,35-48
filter source-port 35 drop 1-34,36-48
filter source-port 36 drop 1-35,37-48
filter source-port 37 drop 1-36,38-48
filter source-port 38 drop 1-37,39-48
filter source-port 39 drop 1-38,40-48
filter source-port 40 drop 1-39,41-48
filter source-port 41 drop 1-40,42-48
filter source-port 42 drop 1-41,43-48
filter source-port 43 drop 1-42,44-48
filter source-port 44 drop 1-43,45-48
filter source-port 45 drop 1-44,46-48
filter source-port 46 drop 1-45,47-48
filter source-port 47 drop 1-46,48
filter source-port 48 drop 1-47

Michael_D
Advisor

Re: Blocking client to client communication

@Pieter:
Yes workstations are domain members so a local firewall could be a quick fix. Thanks.

@Abdullah:
I'm familiar with basic ACL's. The IP scheme is workstations on 10.101.0.0/24 VLAN 308 and servers on 10.1.1/16 VLAN 300.

@Robert:
I did look into filter source ports and it is an efficient way to block local switch port to port communication. I was hoping for a more simple way to configure this - Configurations tend to get relatively complex with this.