Question

Websense viewing traffic on a switch

Asked by: LAzuberi

i have installed websense for web traffic monitoring and filtering. i need to be able to see the traffic from the firewall across other ports. our swithes do not have the capability of port spanning, so i seem to be only left with the option of trying to find a hub. the problem being i need it now and it's hard to find an actual hub these days.

i have a little negear 16 ethernet switch gs116. do you think i would be able to see traffic on other ports with something like this or can you recommend another course of action please.

thanks

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Asked On
2007-01-21 at 22:01:49ID22131101
Tags

websense

,

hub

,

switch

,

traffic

Topics

Miscellaneous Networking

,

Network Switches & Hubs

Participating Experts
4
Points
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Comments
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Answers

 

by: The--CaptainPosted on 2007-01-22 at 00:12:27ID: 18363552

>i need it now and it's hard to find an actual hub these days

LOL - just tell people you do computer equipment recycling, and you will find yourself buried under piles of hubs - I know a guy who does computer recycling, and he uses hubs as paperweights...  In fact, you might want to find a local company who already does recycling, and ask about getting a hub from them - if they're anything like the guy I know, they might even give you one (or more ;-) for free.

Looking at the specs for your netgear, I don't think it supports replication of all traffic to a certain port - you could always arpspoof everything, but I doubt that's really what you want.

Cheers,
-Jon

 

by: dragon-itPosted on 2007-01-22 at 01:41:20ID: 18363875

Most big companies have hundreds of them lying around, I get asked if I want some most places I go too!  You CAN still buy them new too but beware of dual-speed hubs.  Effectively they tend to be a 2 port switch, one 10, one 100 and the 10meg machines are on a different collision domain to the 100's.  All would be OK with a dual speed hub as long as you run all interfaces at 100/half or 10/half - probably not a problem unless your router only has a 10baseT interface in which case just drop the speed on your firewall to 10/half too.

Something like this:  http://www.ebuyer.com/UK/product/30256  would be fine if you can't find one in a scrap heap somewhere!

Steve

 

by: The--CaptainPosted on 2007-01-22 at 02:16:12ID: 18364027

If you exist in dragon's time zone, you should be in good hands - if not, you might have to wait for more responses from me until I get some sleep...

Cheers,
-Jon

 

by: dragon-itPosted on 2007-01-22 at 02:34:16ID: 18364101

Don't think there can be much to add here anyway eh!. I probably didn't really need to add my remark to yours, just the hint re: 10/100 hubs I thought was worthwhile adding really.

Steve

 

by: davystocksPosted on 2007-01-22 at 09:35:21ID: 18367049

You could always use a tap instead of a hub, you can use the inexpensive option such as;

http://www.snort.org/docs/tap/

or you could buy one from Netoptics.  These are great products but cost about EU-1000 each.

http://www.netoptics.com/products/product_family_details.asp?cid=1&pid=141&Section=products&menuitem=0

 

by: The--CaptainPosted on 2007-01-22 at 13:57:09ID: 18369883

davystocks - did you actually read the question?

A tap only helps here if you can place the tap at a point through which all traffic is flowing - the author doesn't have such a place, hence the point of the whole question.

Cheers,
-Jon

 

by: davystocksPosted on 2007-01-23 at 07:58:04ID: 18375647

The question asked referred to seeing traffic from the firewall to all other ports, so a tap placed on the interface of the firewall would capture all traffic from the firewall to all other ports, so yes I did read the question - did you?  
Cheers.

 

by: robsatxPosted on 2007-01-23 at 16:25:34ID: 18381260

Picked up a Netgear hub @ Frys for the same issue last week. Except I use SurfControl. Works great!

 

by: The--CaptainPosted on 2007-01-25 at 02:49:24ID: 18394350

>so yes I did read the question - did you?

Apparently not well enough - I somehow was thinking the author wanted to monitor local traffic between LAN machines - you are completely correct, and I completely apologize - if the traffic needed to be monitored flows through a specific device, then a tap would certainly work - that's what I get for posting in haste (and confusing this thread with other unrelated threads ;-)

I hope you can forgive...

Cheers,
-Jon

20120131-EE-VQP-002

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