Dear Maintainer, I think the current version of /etc/yp.conf is as: https://salsa.debian.org/debian-nis-team/ypbind/-/commit/3327e48cc4ee55b3c8ccc3e6605c4be0046f8149#de083f4b366292ddfb7f2e8e71612737caf91d9f_0_4 ... which says: # broadcasting on the local net (which is the default). ... but, as of Bullseye, /usr/share/doc/nis/NEWS.Debian.gz says: Finally, ypbind does not start in broadcast mode automagically anymore, if you need broadcasting use the -broadcast command line option or add broadcast to the /etc/yp.conf file. I believe the NEWS file is right and /etc/yp.conf could use an update.