Linux System Admins Blog

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CSF Not Detecting POP3 Login Failures

May 7th, 2009 · No Comments

This is the second time that CSF on our Cpanel server is not detecting POP3 login failures from a dictionary attack. The IP address was added on the ip deny list but still it was able to attempt to login on POP3. We have our LF_POP3D set to 20 and LF_POP3D_PERM to 1 [...]

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Tags: Security · cpanel · firewall

Cisco ASA 5505: Active/Standby Failover Configuration

February 17th, 2009 · 7 Comments

The ASA 5505 is the smallest (and cheapest) solution from the current Cisco hardware security appliances. Still, if we have the proper software license (like Security Plus for example) we can use the ASA5505 to setup rather complex solutions. This post will show how we can setup a pair of ASA5505 in failover configuration, solution [...]

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Tags: CLI · Security · cisco

HowTo upgrade ASDM using CLI on Cisco ASA5500

January 27th, 2009 · 2 Comments

This post will show how you can easily upgrade ASDM (Cisco Adaptive Security Device Manager for ASA) to the latest version on a Cisco ASA5500 firewall using the command line interface. In order to do this you will need the latest asdm image (you will need a proper cisco cco user and contract to download [...]

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Tags: CLI · Security · sysadmin