el9 bind-9.16, maybe netstat/os? tcp 0 0 x.x.x.x:53 0.0.0.0:* LISTEN 46622/named tcp 0 0 y.y.y.y:53 0.0.0.0:* LISTEN 46622/named tcp 0 0 127.0.0.1:53 0.0.0.0:* LISTEN 46622/named
> -----Original Message----- > From: bind-users <bind-users-boun...@lists.isc.org> On Behalf Of Thomas > Hungenberg via bind-users > Sent: Monday, 8 July 2024 10:53 > To: bind-users@lists.isc.org > Subject: netstat showing multiple lines for each listening socket > > Hello, > > we have been running some BIND nameservers on Debian-based systems for > many years. > > Until (including) Debian 10 with BIND 9.11.5, netstat always showed only > one line > per listening socket, e.g. > > tcp 0 0 10.x.x.x:53 0.0.0.0:* > LISTEN 1234/named > tcp 0 0 127.0.0.1:53 0.0.0.0:* > LISTEN 1234/named > udp 0 0 10.x.x.x:53 0.0.0.0:* > 1234/named > udp 0 0 127.0.0.1:53 0.0.0.0:* > 1234/named > > > We noticed that with Debian 11 and 12 (BIND 9.16.48 / 9.18.24), netstat > instead > shows multiple (on some systems four, on others up to 20) completely > identical lines > for each listening socket, like this: > > tcp 0 0 10.x.x.x:53 0.0.0.0:* > LISTEN 1234/named > tcp 0 0 10.x.x.x:53 0.0.0.0:* > LISTEN 1234/named > tcp 0 0 10.x.x.x:53 0.0.0.0:* > LISTEN 1234/named > tcp 0 0 10.x.x.x:53 0.0.0.0:* > LISTEN 1234/named > tcp 0 0 127.0.0.1:53 0.0.0.0:* > LISTEN 1234/named > tcp 0 0 127.0.0.1:53 0.0.0.0:* > LISTEN 1234/named > tcp 0 0 127.0.0.1:53 0.0.0.0:* > LISTEN 1234/named > tcp 0 0 127.0.0.1:53 0.0.0.0:* > LISTEN 1234/named > udp 0 0 10.x.x.x:53 0.0.0.0:* > 1234/named > udp 0 0 10.x.x.x:53 0.0.0.0:* > 1234/named > udp 0 0 10.x.x.x:53 0.0.0.0:* > 1234/named > udp 0 0 10.x.x.x:53 0.0.0.0:* > 1234/named > udp 0 0 127.0.0.1:53 0.0.0.0:* > 1234/named > udp 0 0 127.0.0.1:53 0.0.0.0:* > 1234/named > udp 0 0 127.0.0.1:53 0.0.0.0:* > 1234/named > udp 0 0 127.0.0.1:53 0.0.0.0:* > 1234/named > > > We wonder what is causing this and if this is intended behaviour? > > > - Thomas >  > -- > Visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe > from this list > > ISC funds the development of this software with paid support > subscriptions. Contact us at https://www.isc.org/contact/ for more > information. > > > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users -- Visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list ISC funds the development of this software with paid support subscriptions. Contact us at https://www.isc.org/contact/ for more information. bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
