PowerDNS is a great little DNS server, especially if you want to use OpenLDAP for the backend. Unfortunately some of it's features are not well documented. That includes creating SRV records when using the "tree" structure of LDAP storage.
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I've been using LDAP for central authentication, but I hadn't added encryption until recently. With the advent of network switches, on a cabled network it has become very difficult to "sniff" or listen in on other network traffic. With wireless though it's much easier, so encrypting all traffic is a good idea.
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Continuing my "avoid the console" series, I'm going to cover remotely managing partitions on a Linux server. Yes, this will involve a bit of console, but this will set you on a path to using GUI tools on your servers without having to install a complete windowing environment. Installing a complete desktop-like environment is a waste of resources for most servers, so keeping things to a minimum helps to streamline and allow your servers to do more things with less hardware.
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You may recall this article from last February where I described how to set up an OpenVPN server in Ubuntu. One thing that's bothered me ever since that day is that the client could contact everything on the server's network but not vice-versa. I searched for answers for quite some time and finally gave up.
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I've had a bit of a strange situation on my network - Googling never did come up with anything for me.
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Sure, there's a lot of tutorials out there for blocking SYN+FIN, christmas scans, etc. But did you know that most of those won't help against a default nmap scan? Try it - block all the standard stealth scans, etc using something like the following...
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For me, setting up an OpenVPN server on Ubuntu Server was orders of magnitude easier than trying to use a commercial ipsec utility. Here's the steps to take to set up an Ubuntu 8.04 (Hardy) server.
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This HOWTO assumes you are already an Ubuntu 8.04 or 8.10 server administrator, and have a good level of understanding that goes along with that. If you don't know how to use "vi" or "nano", or you don't understand basics of XML files, this tutorial is not for you.
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Pound proxy is a great solution for adding a bit of a security layer, flexibility or scalability to your web server(s). If you're doing anything much more complex than hosting a blog, Pound may have some added value for you.
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I just attempted to log into the digital photography review website forums at dpreview.com. I was greeted with the following error:
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