Network Security

I have a client that is running an ASA5512-X.  When I initially installed it, they were having issues sending out emails.  I disabled ESMTP inspection and thought it resolved the issue.  Recently, they upgraded to Exchange 2010 and are still having a...

We have seen IPS Signature 1802/0-"Ruby on Rails Remote Code Execution Vulnerability" trigger frequently on any webpage with XML with YAML content I'm wondering if anyone else has seen this new signature fire frequently. It looks to me that this sig...

Hi,Can i know that when use remote access vpn connect to asa firewall inside interface, after that the remote access vpn is it can connect to another firewall segment , the firewall segment is behind the inside interface?

Hi all,We have this case :A CISCO 3750-X stack with several VLANs  and many ACLs applied to the virtual interfaces. Intervlan routing is on. Connected to this stack are VMware hosts and with about 500 VMs.We started using the ACLs to allow connectivi...

Hi Guys, One of our client experiencing and intermittent issue with DNS results(Unable to resolve DNS addresses externally) while connected via Cisco VPN.User can connect internal resources fine, intermittent issue accessing external Websites. Ping, ...

Can ASA firewall allow 3 interfaces connected in transparent mode? Can 3 interfaces separate into 3 zone?

I have a network with multiple subnet, when I put the ip adress of pix as a gateway, I can not ping the others IP subnets, the ping to outside is correct, and the ping works in the same subnet. Internet connection works, my need is only permit ping b...

           Hi GuysHaving upgraded to 8.3 from 8.2 I and read much about the differences , it seems that 8.3 deals with NAT in a much more managed method.However I am confused on how one would NAT a network object to multiple interfaces? i.e I know yo...

Hello,I have 4 Cisco ASA 5520 devices in our network.  One of them did a cold start a few days ago.  Only 4 people have access to the device including myself.  I dont think any of the 4 people rebooted the ASA.  No one was in the server room on that ...

Dear Experts,My FWSM is blocking the return traffic because it retuns from different VLAN than the traffic has been established , which is normal . I would like to enable the FWSM to allow this kind of traffic , do you know how to do it ??  my traffi...