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Troubleshooting memory issues requires TAC support to get accurate result. 1. To identify a memory leak on pix, get the periodic (hourly) output of “show memory detail”. Send this to the TAC, they will see the memory utilisation divided per block size. Example: pixfirewall(config)# show memory detail Free memory: 201811608 bytes (75%) Used memory: Allocated […]
November 23, 2010
1, Get a config where CBAC is enabled and access-list are applied on the interfaces If the configuration of the CBAC and ACL is wrong then the following steps will show wrong results. Check the configuration of the router before you suggest the followings. 2, Check the “show commands” output 2.1 Check the inspection states […]
November 22, 2010
The basic certificate based VPN is as easy as the VPN with pre-shared key. There is only some additional steps required from the ASA site. The problems arise if the clients starts to use certificates without knowing what and how they should do. As a Firewall administrator you can not have responsibility for all clients, […]
November 19, 2010
In the following example I configured a basic L2L VPN between 2 PIX firewall with pre-shared key. The Firewalls has different software versions, the sp2 is an old 6.3.4 version firewall (no more support..). sp1 (Cisco PIX Security Appliance Software Version 7.1(2), PIX-515E) E0 – ssw fa0/20 E1 – ssw fa0/12 sp2 (Cisco PIX Firewall […]
November 19, 2010
Follow the following order of the documents: 1. Enabling Multiple Context Mode 2. Adding and Managing Security Contexts 3. Configuring Failover 4. Configuring Active/Active Failover My Example contexts (Code 7.0.5) Topology Initial context configuration: 1, pixfirewall(config)# mode multiple 2, Create admin context (This is done while issuing “mode multiple” command by default): admin-context admin context […]
November 18, 2010
Cisco ASA wccp support for WAAS configuration guide. proxy server should accept requests on port 8080 and 80 Topology: IP addresses: ASA inside IP: 10.10.10.1/24 PC IP: 10.10.10.10 PROXY SRV IP: 10.10.10.251 Action Plan: WCCP Interaction with Other Features for PIX/ASA: http://www.cisco.com/en/US/docs/security/asa/asa80/configuration/guide/dhcp.html#wp1094445 Here I have read the following: “The standard service is web-cache, which intercepts […]
November 18, 2010
1. Assign interface to a sensor in AIP-SSM On the AIP-SSM you can configure interfaces for virtual sensors: SA1-AIP-SSM(config-ana-vir)# physical-interface ? GigabitEthernet0/0 GigabitEthernet0/0 physical interface. GigabitEthernet0/1 GigabitEthernet0/1 physical interface. This is only 2 no matter how many interface the ASA has. – GigabitEthernet0/0 can only be Command and Control Interface / Management /. – Alternate […]
November 18, 2010
Both the ASA and the AIP-SSM is able to failover or at a minimum to bypass the traffic. ASA fail-open and fail-close commands is for determening to allow or deny the traffic that has to be analysed with IPS. 1. with the following configuration ==ASA== policy-map outside-policy class outside-class ips inline fail-open ==IPS== ByPass mode […]
November 17, 2010
On the Cisco ASA Firewall you can redirect the traffic on the incoming interface back to the incoming interface if you want. This feature is from Version 7.2.2 reachable. To demonstrate this feature I made a small test topology with a Cisco ASA Firewall and an internal router. Topology: Requirements: On the Topology the Test […]
itsecworks 
November 23, 2010
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