My Network Security Journal

Sharing my learning and personal experience in IT Network Security.

Thursday, June 8, 2017

Zero Downtime Upgrade on a Cisco ASA Active-Standby Firewall Pair

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Below is a summary of the steps in order to perform a zero downtime upgrade on a Cisco ASA Active/Standby firewall pair. 1) TFTP the ASA...
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Wednesday, May 3, 2017

Troubleshooing Proxy Phone on a Cisco ASA Firewall

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You can use show version to check if the ASA has the proper UC Proxy Phone license installed and show phone-proxy secure-phones for troub...
Friday, April 7, 2017

Center for Internet Security (CIS) Free Cisco Benchmark PDF

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I was searching over the Internet for a best practice guide to be used for my network audit. I'll then perform device hardening afterwa...
Wednesday, March 22, 2017

Subscribing to Cisco Security Advisories and Alerts

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I needed to be up-to-date with Cisco security alerts particularly with Cisco ASA firewall vulnerabilities. So I've subscribed to Cisco...
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John Lloyd Lagura
I'm John Lloyd Lagura, a passionate Network Engineer, tech blogger and a lifelong learner. I specialize in routing, switching, security, wireless and cloud technologies. I currently hold CompTIA Network+, Security+, ITIL Foundation, Cisco CCNP Security, CCNP Enterprise, CCNA Cyber Ops, Juniper JNCIA-Junos, JNCIA-SEC, JNCIA-Design, Fortinet Network Security Professional (NSE4).
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