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I'm looking for a Proxy Server Distro to run on a Cacheflow Box (now known as BlueCoat). The original OS was CacheOS which I suspect was linux based, the latest version is called SGOS. Having emailed Bluecoat I've discovered they will not provide support of any kind unless you pay for a support contract.
I've looked at Squid. This requires an existing Linux OS. Ideally what I'm looking for is a Linux OS designed purely to be installed on a proxy server, as a proxy server. So basically an alternative to the CacheOS or SGOS that bluecoat provide that I can install straight onto the box, preferably via a network.
Ideally what I'm looking for is a Linux OS designed purely to be installed on a proxy server, as a proxy server.
You mean a Proxy Metadistro, may be. I think Astaro (commercial), IPCop and SmoothWall might be the closest choices, but... If I just knew what architecture a cachebox have, I could answer better, anyway, Ubuntu Server isn't a proxy metadistro, but it is a server distro, to do anything you want with it. Squid is included, but you have "apt-get install " command available to install whatever your server need from the internet Ubuntu's software-repositories, so... ¿Why not Ubuntu Server with Squid, Apache, ClamAv, DansGuardian and Iptables on (for a Content Filtering, Firewall, Antivirus & Proxy Cache)?. The "problem" might be that you'll need some or lot of researching (plus configuring) if you aren't a GNU/Linux admin. You can add features as you learn (better before), like centralized auth, Samba PDC for MS clients, remote administration, etc... you know, all the needed stuff. SecurePoint, Trustix Proxy Server and SafeSquid might help aswell, but they are commercial solutions. In the end, you may need a network admin too, I presume (may be wrongly). He / You will prefer surely a GNU/Linux to build up, as any kind of server you need, instead of easy-handling commercial-patented limited software that sooner or later becomes expensive.
Your big Pro here is with Free-Libre Software, you have a helpful community instead of commercial payments; anyway, in some corporative cases the last option is more useful.
The one you had installed, if I've seen right on the internet was a firewall too. In Astaro, IPCop, Smoothwall, etc. you just have to add the proxy package (if it isn't included by default). I'm assuming you will install in some available PC before running the install on the cachebox. There is no free distributed proxy metadistro based on linux kernel, that I know. Trustix Proxy Server is one, but is commercial (like yours). With any other (not commercial) you have to build your installation, adding and removing packages; example: you install IPCop and take out some packages you don't want, and add and configure squid and dansguardian (proxy and content filter), it's just an example. You was looking for a prebuilted proxy based on linux kernel, I named the only one I know (Trustix Proxy Server).