Squid tends to be a bit of a memory hog. It uses memory for many different things, some of which are easier to control than others. Memory usage is important because if the Squid process size exceeds your system’s RAM capacity, some chunks of the process must be [...]
Unless you’ve been living under a rock, you’re aware of the spam problem on the Internet. Spam senders used to take advantage of open email relays. These days, a lot of spam comes from open proxies. An open proxy is one that allows outsiders to make [...]
Squid has an extensive, but somewhat confusing, set of access controls. The most important thing to understand is the difference between ACL types, elements, and rules, and how they work together to allow or deny access.
Squid has about 20 different ACL types. These refer to certain [...]
Squid writes to various log and journal files as it runs. These files will continually increase in size unless you take steps to “rotate” them. Rotation refers to the process of closing a log file, renaming it, and opening a new log file. [...]
Introduction to Windows Firewall
The introduction of high-speed Internet connectivity has created a powerful and extraordinary computer networking experience. This newfound burst of bandwidth has launched new innovations in information exchange, media access, and other advanced computing experiences. Unfortunately, this technology has also created a very accessible conduit to the internals of your computer. Using these [...]
From the mailbag, Jesse C. writes:
I have been assigned a project within my organization to perform OS Fingerprinting on subnets. What I find is that end-users that do not use Windows Firewall (have it disabled or not installed), I am able to detect their OS with no problem. The problem lies that many new users [...]
