Monthly Archives: June 2014

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

Posted in DNS, Exploits, Linux, Microsoft, Networks, PCI, Vulnerabilities | Comments Off on The importance of using stateful firewall rules on port 53 (DNS)

Upgrading OpenSSL on an old CentOS box

Warning – this procedure is extremely risky (but has worked every time for me). It is suggested that you do a dry run on a VM before attempting this on a live server.  If anything goes wrong, you may be … Continue reading

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