Package: netcat-openbsd Version: 1.130-3 Severity: normal Tags: ipv6 Dear Maintainer,
The man page for nc(1) says the -4 or -6 switch forces ipv4 or ipv6 only, respectively. This suggests that using neither switch enables both. But this isn't what I found. Below is a table where going down the first column is nc listening and going along the first row is nc as a client, with various combinations of the switch. "Yes" means the client and server communicated, "no" means they didn't. | Server/Client | nc -4 127.0.0.1 4321 | nc -6 ::1 4321 | |---------------+----------------------+----------------| | nc -lkv 4321 | yes | no* | | nc -4lkv 4321 | yes | no | | nc -6lkv 4321 | yes* | yes | |---------------+----------------------+----------------| * these are the inverse of what I expected. I hope that makes sense. Thanks -- System Information: Debian Release: 9.7 APT prefers stable-updates APT policy: (500, 'stable-updates'), (500, 'stable') Architecture: amd64 (x86_64) Kernel: Linux 4.9.0-8-amd64 (SMP w/4 CPU cores) Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE=en_GB:en (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages netcat-openbsd depends on: ii libbsd0 0.8.3-1 ii libc6 2.24-11+deb9u3 netcat-openbsd recommends no packages. netcat-openbsd suggests no packages. -- debconf-show failed
