Network Security

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Cisco CyberSecurity


Forum Posts

The ASA 5510 here is crashing frequently. We have been unable to find out why exactly this is happening, and the device is not under a service contract. The logging that is in place doesn't give any hints as to why this is happening. Since the last t...

I have a simple IP address design question.When I design internal networks, I create /24 networks for all my internal VLANs For example:Servers are are is these networks summarize nicel...

dnoc43 by Beginner
  • 1 replies
  • 0 Helpful votes

 Hi everyone, Scan results shows that ASA 5520 config for ipsec and anyconnect ikev2 has following vulnerabilityMedium strength ciphers supported-----The remote host supports the use of SSL ciphers that offer medium strength encryption, which we curr...

mahesh18 by Frequent Contributor
  • 7 replies
  • 0 Helpful votes

So AT&T has forced me to switch from their standard DSL to the new U-Verse.......  So far things have been less than fun. My set up was this.5505 set up to establich PPOE connection.  This 5505 then created a VPN to different office.  Staff could sur...

toddyboman by Beginner
  • 1 replies
  • 0 Helpful votes

Dear All,I have a Nat design question. I would like enhance the communicaton that i have with a partner company.The issue is that we use common ip addressing for several networks.You can see in the attached diagram . I have currently an ASA 8.2.5 whi...

I have a slightly odd request due to audits. I am being asked to put an ASA firewall between 2 VLANs and the other VLANs on my 4510R+E. I thought I could just disable routing on the 2 VLANs on the switch and forward the traffic to the ASA allowing it...

Hi, Iam setting up a DMZ environment to have External customers access my Servers sitting in the DMZ. I have attached the diagram for reference.Proposed Setup1) 2x ISP links (redundant) - IPSEC connections from customer terminating on our Internet Fa...

Mikey John by Beginner
  • 6 replies
  • 0 Helpful votes

Hi,We are using a ASA 5512.Inside there are not more than 20 odd hosts. This is lying at remote office and is managed remotely via ssh if required.We are using 9.1(3) firmware. Around 4 months backthere was one incedent  internet stopped working afte...

sushil by Beginner
  • 1 replies
  • 0 Helpful votes

Sorry for the trivial question, but I can't seem to figure out setting up NAT with multiple external IPs (e.g. - I have my outside inteface set to, however how do I allow say RDP (tcp 3389) being sent to to be forwar...

Resolved! self-signed cert

I have a customer that is using an ASA 5515 and they are requesting the certificate for the webVPN to be changed to use 2048 bits for the Public Key. They didn't purchase or install a cert on this firewall so it is just using the default cert that wa...

I am trying to setup PRSM and the CX module on a Cisco ASA 5515. I have PRSM setup on a VM on at my main site, I have the ASA installed at another site with an internal interface IP address of and the two sites are connected v...

burleyman by Collaborator
  • 5 replies
  • 0 Helpful votes
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