Other Security Subjects

We're getting a ton of informational packets (tcp build / teardown) from firewalls here.  I can kill this at the source (drop to "notification" level, filter out the build / teardown events, etc.) but would rather not throw this stuff away (good clue...

Dear Cisco Experts,My school (PVAMU) uses Cisco NAC Agent.  A few days ago I was able to access the internet on my desktop w/o any problems.  Now, however, I cannot access the internet even though I can connect to the actual wireless network.  I was ...

Once you have tuned a false positive in MARS.  Where can you go to view the signatures that you have tuned?  I know the "False Positive" tab only shows some of the tuned signatures, but where can I go to view all user created false positves after the...

Hi,I have a MARS box (110R) and I would like to monitor the appliance itself with our HP OpenView using SNMP.Is it possible to do that? All I found in the documentation was how to forward events that fired a rule, but not how to send traps to a SNMP ...

I am piloting an 802.1x implementation for a client who has Mitel IP Phones.  I have setup the switch and ACS based on previous experience and a windows PC can authenticate onto the network OK.  When I use a Mitel phone however, it seems to skip past...

I have upgrade Cisco Catalyst 3750, 3650 etc from old IOS version (c3750-i5k91-mz.122-25.SE.bin) to newer (c3750-ipservicesk9-mz.122-55.SE1.bin)In pre upgrade configuration i have configured IEEE 802.1X authorization.But after upgrade many commands o...

Hi all,I've been having trouble with AD SSO on NAC deployed in L2 OOB VG mode.Users are getting a message that says:Unknown userPlease contact your administrator if the problem persists.I check the event logs in the NAC Manager and it says "Unknown u...

I have , voice vlan 10 and data vlan 5.And My unauthentciated vlan is 8.NowWhen I am using L3 mode for CAS in OOB  , there is no issue .When I configure Cas is configured in OOB virtual gateway L2 mode , the machines are not able to get an ip address...

Dear Sir,I have CS-MARS model 20.When I try to boot with recovery image it gives me the following message : Unable to load scsi driver Have some idea about this issue?!Thanks.

I am about to turn up some new Nexus switches, and am curious if anyone else has tried using MARS to discover and collect syslogs from NX-OS. If you've tried it, what was your experience? Are the Nexus syslogs close enough to IOS syslogs to at least ...

I am attempting to install a third party SSL cert (GoDaddy) to properly secure the external interface of my 1811 ISR so that I can implement SSL VPN. I have tried using SDM 2.5, but that doesn't appear to be working. I am familiar with doing this o...

Join Omar Santos as he takes your questions on the current trends in network security and threats.Omar Santos is a senior network security engineer and incident  manager within the Product Security Incident Response team (PSIRT) at  Cisco. He has mor...