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Dynamic DNS Updates with TSIG for Security
- Details
- Written by Les Bell
- Category: Networking and Data Communications
Many network administrators have eased their workload by switching to using a DHCP server to configure client machines. In most cases, these machines do not run any services, so other machines never want to contact them, and so the lack of a corresponding entry in the domain name service is not a problem.
However, there are times when a machine requires a valid entry in the DNS. Traditionally, DNS has been set up by creating entries - called resource records - in text files called zone files. A typical address record for a host would look like this:
alpha IN A 10.0.0.52
SSH for Remote Access
- Details
- Written by Les Bell
- Category: Infosec
Most system administrators soon find that working at the command line is the best way to work, for several reasons:
- Low bandwidth
- Ubiquity
- Scripting
In this article, I'll describe ways to make use of SSH for fast, easy access to multiple systems with good security. Instructions are provided for both Windows and Linux clients.
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