Network Security

I've been deploying Cisco routers for the longest time now, and I was curious, how necessary is it to apply ACLs to the WAN interface with a single nat overload (on Vlan1)? I was under the impression that natting alone provided the necessary security...

Hi, I want to configure the firewall for support two ISP (Internet)...For this goal, I configure two contexts into the ASA5510 and, Context 1 : I configure to outside interface the GIG0/0 -> Router ISP1                I configure to inside interface ...

We are migrating from CWLMS 3.2 to 4.0. After successfully fresh-installing the 4.0 software on a new server, which is in a production environment protected by a host-based firewall and a network firewall.Once we access Topology Services, we get two ...

I have a pix 515 with 4 port nic installed. I have outside setup with public ip inside setup up with private ip of one of my inside subnets and eth2 on ex card setup with different private subnet on our network. I need to be able to access internet f...

Hi,We have ASA 5510 running 8.3(2). There was no problem if one single NATed client made VPN connection to the ASA 5510. However, when there were more than one NATed clients made VPN connecttions, either the new client got no connection or the old co...

I am pretty new to ASA and i need to do some NAT (for servers) Scenario is that we have a customer who is connected to data centres via MPLS private WAN cloud.....we have ASA 5510 using 8.2 IOS.there is a dynamic NAT confiured for 0.0.0.0 0.0.0.0 (go...

My ASA just crashed.Can anyone help me with the crashinfo? I looked over the ASA bugs but there are so many with "Thread Name: Dispatch Unit"Thread Name: Dispatch UnitAbort: Watchdog failure    vector 0x00000000       edi 0x1c6d0794       esi 0x00000...

I have a vpn ssl remote access with a fw asa 5510 version 8.02. When users use anny connect vpn ssl they in the Lan can access to the servers,but they can not access using ssh or telnet to inside fw asa.I would like to know wich is the trouble aaa au...

Hi all expert,I used the ASA 5510 and in these days, facing the problem is internet is very slow. When i check in real-time log viewer debugging, i found the following logs6|Jun 29 2011|15:47:53|106015|123.123.123.123|416|111.222.111.222|80|Deny TCP ...

Hi ALLI found a tricky task for our ASA 5505 firewall. I am not able to go internet when using DHCP but I can access by using fixed IP address in client PC.Same IP, Same Mask, Same DNS, Same Gateway. All the same but no hope. What is your opinion? An...

Every 7 days (give or take a day) the PIX stop letting traffic through.  I reset the modem or reload the PIX traffic resumes.  Is it possible the modem is updating (maybe updating isn't the correct word) and the PIX isn't updating with it? When i's i...

Hi, from the last firmware 8.4.2 with asdm 6.4.5 I have a problem on ASA5505 to pinging the inside of asa and to accessing in telnet or https through a VPN tunnel: the ASA doesn't respond to ping, telnet and https on the inside interface. I can pingi...