This is an ncurses network monitor. It is a "prerelease" release but the last non-"prerelease" did not support ipv6. Debian has packaged this series since Wheezy.
Leo Famulari (1): gnu: Add iftop. gnu/packages/admin.scm | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) -- 2.7.0.rc3
