Monthly Archive: February 2011

Feb 03

Traceroute through Cisco ASA Firewall

To allow traceroute through firewall needs configuration depending on the source of traceroute command. Microsoft uses tracert command and  ICMP message types for traceroute (unreachable, time-exceeded, echo-reply). You will use following ACL entries to allow trace traffic to pass through the firewall. In the following example the inside interface is allow to reach hosts but outside …

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Feb 02

Cisco 3560 IOS Issue

The following IOS version has issue connecting Cisco 7940 phones on it ports. The switch ports were getting error disabled with warning message of 'loopback detected'. The initial thinking was that its being caused by some inline power misconfig but with nothing much to configure power related on switch, it was ruled out. A …

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