Category Archives: Networking

Querying for DNS Glue Records (using dig)

Posted on February 16, 2011 by Barry O'Donovan

On a project I’m working on, I need to establish if a domain has IPv6 glue records or not. If I had to do it on a once off, a whois lookup would answer that nicely: $ /usr/bin/whois opensolutions.ie <snip> … Continue reading →

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Useful RANCID Debugging Tips

Posted on February 5, 2011 by Barry O'Donovan

I always find it difficult to find a good reference for RANCID debugging strategies and, after spending the afternoon on doing same on one installation, put together my own list. Head over to my article on the company blog for the … Continue reading →

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We’re Now Available Over IPv6!

Posted on September 28, 2010 by Barry O'Donovan

You probably won’t have noticed but this site is now available over IPv6: $ host www.barryodonovan.com www.barryodonovan.com has address 87.232.16.35 www.barryodonovan.com has IPv6 address 2a01:268:3002::35 I spend a lot of my working hours doing a lot with IPv6 and, as … Continue reading →

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Asterisk SIP Brute Force Attacks on the Rise

Posted on September 17, 2010 by Barry O'Donovan

See my article on the company blog for a discussion on this, and a how to on using Fail2ban to help stop these attacks.

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Kubuntu 8.10 and Mobile Broadband (and KDE 4.1)

Posted on October 31, 2008 by Barry O'Donovan

Kubuntu 8.10 and mobile broadband – the KNetworkManager has come a long way! Continue reading →

Posted in Linux, Networking, OSS | Tagged | 1 Comment