Network Security

Bpdu guard keeps error disabling my trunk ports to the 4260. Two physical interfaces for two inline pairs (inside and an outside) with 2 vlans per trunk.Anyone got any experience with this problem on nexus gear?

I will be moving our ASA 5520 firewall/VPN appliance to a new location in our network. In the near future I would like to split the firewall and VPN functions to two seperate ASA 5520's, but for now I am keeping them together. My question is, I would...

HiI have implemented Cisco NAC for remote VPN users. As part of this they go through 3 checks:1. Antivirus installation check2. Antivirus definition check3. File checkI have configured the definition check to remediate via internal update servers if ...

Hello,I have pair of ASA 5550 and I am trying to copy a new config to my member1 (active) as the new configuration I want to use for the pair.  I want to copy this to start-up config on member1 and then reload member1 and have it copy the same config...

Hello,I'm trying to attach tacacs server (ACS Version 5.2) in server group on ASA 5520 (Version 8.4). When I test connection in ASDM (Version 6.4) between ASA and ACS it fails. The log message on ASA is:%ASA-2-106016: Deny IP spoof from (10.8.27.126)...

Dear ExpertI am using the Cisco ASA5510 for my Telepresent infarstructure.I have a problem with Encrypted SIP calling for call in/out.Is there is a way to disable the TLS inspection for Cisco ASA5510?Thx

Hi all,I'm configuring a l2l tunnel.While configuring the crypo acl I noticed that my ASA was accepting subnetmasks like 255.255.255.1 (wich does not exist to my knowledge).I then tried some other masks, and to my surprise it accepted almost everytin...

Hi With the same FTP Client behind the firewall, we are trying to access 2 different FTP servers on Internet. The 1st FTP server is working without issue and able to transfer file.But for the 2nd FTP server we unable to transfer the file. FTP inspect...

It is my understanding that the FWSM for the 6500 series switches uses a 6 port Etherchannel on the backplane to communicate with the 6500 series switch.Can you shutdown vlan1 on the switch and still communicate with the FWSM? I was under the impress...

Ok, I can't for the life of my figure out why internal syslog traffic would be dropped at the firewall.  I've come across a few support forums with comments like 'disable the specific syslog error, etc.' however this does not fix my problem.  I need ...