Category Archives: Linux

Raspberry Pi as a bind DNS slave and an exim MX backup

DRAFT, to be completed, but this still might help you: This was for an Rpi B with 512MB RAM. ¬†Raspbian Jessie. This is a custom exim 4.86 TLS build to use OpenSSL instead of GNUTLS. Follow the instructions here, to … Continue reading

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The importance of using stateful firewall rules on port 53 (DNS)

Scenario A firewall appliance forwards DNS traffic to the outside world. The traffic generated is e.g. for Server 2008 as per here in Technet, i.e. Traffic Type Source of Transmission Source Port Destination of Transmission Destination Port Queries from local … Continue reading

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Getting ready for IPv6

I want to make sure the Slackware Linux edge servers are ready for IPv6 when eventually the ISPs catch up. We signed up for a free tunnel endpoint with http://www.gogo6.com/freenet6/tunnelbroker/ to try a few things out. Building the gogoc client … Continue reading

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Patching recent Linux kernels ( > 2.6.32 ) for MPPE and MPPC VPN

There is an excellent introduction here http://www.phparchitecture.com/howto_show.php?id=3&showall The part that is missing for kernels (I am told up to 2.6.32) is the link to this: http://code.google.com/p/setvps/downloads/detail?name=Linux-2.6.18-mppe-mppc-1.4.patch&can=2&q= Don’t forget to do a global search and replace of the linux version before … Continue reading

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