On Thu, Aug 3, 2017, 17:23 Giorgio Cittadini <giocitta@gmail.com> wrote:

... when I tried to update there was no success in
updating bindutils-9.10.4-1 to bindutils-9.10,5-1. In fact, downloading
'ftp://ftp.isc.org/isc/bind9/9.10.5/bind-9.10.5.tar.gz' fails since
connecting to ftp.isc.org always times ...

You could manualy download the file from Romster's server (http://crux.ster.zone/distfiles) to your PKGMK_SOURCE_DIR and retry the update. The checksums (.md5sum or .sigature if enabled) for that port should catch any difference compared with the official url.