The original version of sslscan, and the fork of that by ioerror are both pretty much dead.
I maintain a new fork (available on GitHub at https://github.com/rbsec/sslscan) that includes support for IPv6, as well as a number of other features such as TLS 1.1/1.2, CRIME, Heartbleed, etc. It builds properly on Debian even if SSLv2 support isn't available from OpenSSL (although it will display a warning when run that it couldn't scan for SSLv2 ciphers). Dependencies should also be the same as the existing version. ~rbsec
