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Securing ISG

alliancebroadbandkolkata
Level 1
Level 1

ā€Ž11-24-2009 07:32 AM - edited ā€Ž03-01-2019 02:15 PM

Hi

We are an ISP , we are using a 7206VXR Router as our ISG which is working with Broadhop SME. For last few days we are facing a problem  in the ISG - the error message is continiously scrolling up called " Portbundle depleted. No Portbundle can be allocated. " - as a result we were facing a various problems in our network like subscribers cannot log in or logout. However we have incremented number of loopbacks in ISG  and increased the number of Portbundles . After auditing the network it was found that there is some kind of mal- application which was intentionally filling up the free portbundles.

My question is - is there any kind of security measures - may it be an external firewal or ACL written in the ISG itself which will be used to protect ISG from external threats ?

Any suggestion is welcome.

Abhishek

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2 Replies 2

chrmar
Level 1
Level 1

ā€Ž12-04-2009 02:22 PM

So are you also having the issue of a large number of subscribers?  Is any subscriber authentication/authorization being done?

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sneema
Level 1
Level 1

ā€Ž02-18-2011 04:13 PM

You might also placing appropriate ACLs and place your customers and other equipment in separate VRFs

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