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TOPOLOGY: Requirements 1, Layer 3-4 control Customer wants to inspect the following protocols: icmp dns esmtp https imap* pop3* tcp udp *For IMAP and POP3 customer wants to reset the TCP connection if the client enters a non-protocol command before authentication is complete. 2, Layer 4-7 control Customer wants to deny all kind of services […]
November 14, 2010
Configuring zone-based policy firewall on a cisco IOS router is not as easy. To be able to understand the topology of the configuration I used some colors. The key hierarchy is the following: class-map policy-map zone-pair zone security for interface I used in this small example the following topology: Configuration topology: Router parameters: SW: Cisco […]
November 13, 2010
The first step of installing a firewall is to setup the management access of it. Weak protocols like telnet should not be used. if something need to communicate with the firewall, that should be secured. Just another example the logging methods. The syslog itself is again a clear text communication method and should be avoided. […]
November 13, 2010
The routers are managed generally with telnet. Telnet is from security view not the best access method, as it is clear text and fast all end-hosts has a telnet client. In such case secure access should be used with ssh or ssl. A Cisco IOS router can be accessed with ssh as well, the following […]
November 12, 2010
Speed up your failover troubleshooting and activate the prompt command on your ASA. With the prompt command can you specify the followings: context Display the context in the session prompt (multimode only) domain Display the domain in the session prompt hostname Display the hostname in the session prompt priority Display the priority in the session […]
November 6, 2010
If you setup your own syslog server than you can choose to which facility should the router or firewall send the logs. Lets see how it looks like. Step 1. Edit the syslog server configuration file. Let say we use Local6 as our Facility level for the router. # vi /etc/syslog.conf local6.info /netscape/pixfirewall/pixlogs Step 2. […]
itsecworks 
November 16, 2010
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