Network Security

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Forum Posts

Performance impact of ASA5550/5580

I need to block 4000 nodes (Ultrasurf, TOR exit nodes) and I've written a script that will ssh and copy in these objects (prob 100 at a time) into an object group and then put a blanket deny.  I don't see a flood of traffic (occassional hits every ot...

ASA SIP INSPECT does not work (via header)

Hi,Hope you can help .....I have setup a SIP Server behind a ASA firewall (inside interface). The SIP server talks to an external server (via the outside interface).* The ASA is configured to use static NAT. * INSPECT is setup for sip (global service...

mcroft by Beginner
  • 4 replies
  • 0 Helpful votes

Failover interface failed

Hi,    I have 2 ASA 5520 firewall configured with HA(Failover). but some time my primary firewall goes down standby firewall doesnt come active. i found below log from primary firewall..what is the reason & what is the mining of reason code of 4...No...

tcp trace packets

Hi all, Is there anyway of blocking tcp trace packets that are being sent from outside interface to inside ? i have an application that is listening on port 80. Now its a requirement that hackers or unwanted users should not be able to send tcp trace...

Jonn cos by Enthusiast
  • 1 replies
  • 0 Helpful votes

Resolved! ASA 5505 Connecting 2 internal networks

We recently changed locations and acquired a new circuit from our provider. They also connected our remote branch office to our main office through MPLS. Now, as I understand it, the branch office basically connects back to the main office through ou...

bkana2112 by Beginner
  • 16 replies
  • 0 Helpful votes

Multicast on PIX 7.0.4

Hello,I am trying to achieve the following in a lab environment (gns3) before moving to my real network.Multicast Source (inside network) --> PIX --> host router (outside network).The lab topology looks something like this:MulticastSource(router) fa0...

Resolved! Cisco ASA - Internet problems

I have a Cisco ASA 5520 that we was working properly. I tried to create a VPN IPSEC to test but when I finished the wizard I lost the conection between the inside interface and outside. I use other interface for DMZ and other for printers network but...

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