Thanks for your very quick answer, Amos. Amos wrote: > Depends on which version of Debian you use. The 3.1 releases currently in Unstable and Testing repositories have all the requirements for TPROXYv4 enabled. So, would you suggest to do a fresh reinstall of Debian Squeeze, and then fetch the Squid package from there without the hassle of building it from source? > libcap-dev is required to build. I cannot find neither the libcap-dev nor the libcap2-dev in the package repository for my current version of Debian (Lenny). What could be wrong? Thanks again, Leonardo