Thank you for all the answers. It seems that waiting a day or so solved the problem, and now ssh doesn't ask for tweenex password and act like a pass thru, as documented.
One explanation why we see 2 adresses might be because the first one is the proxy/pass thru server, and the second one the host : ssh -v [email protected] OpenSSH_7.7p1, OpenSSL 1.0.2o 27 Mar 2018 debug1: Reading configuration data /etc/ssh_config debug1: Connecting to sdf.org [205.166.94.16] port 22. // proxy (pass thru) server ... Authenticated to sdf.org ([205.166.94.16]:22). debug1: channel 0: new [client-session] debug1: Requesting [email protected] debug1: Entering interactive session. debug1: pledge: network debug1: client_input_global_request: rtype [email protected] want_reply 0 Trying 205.166.94.130... Connected to 205.166.94.130. // host address Escape character is 'off'. TWENEX.ORG, PANDA TOPS-20 Monitor 7.1(21733)-4 Le ven. 10 août 2018 à 17:13, Paul Koning via cctalk <[email protected]> a écrit : > > > > On Aug 10, 2018, at 10:14 AM, Warner Losh via cctalk < > [email protected]> wrote: > > > > On Fri, Aug 10, 2018 at 6:09 AM, Peter Corlett via cctalk < > > [email protected]> wrote: > > > >> On Fri, Aug 10, 2018 at 02:14:54AM +0200, Stéphane Tsacas via cctalk > wrote: > >>> Did anyone manage to connect to tweenex,org through ssh now that telnet > >>> port is closed ? > >>> I received an mail that says : > >>> TELNET access to twenex.org has been changed to only support SSH via > the > >>> SSH passthru user [email protected]. > >> > >> I can connect to that just fine with the standard OpenSSH client: > >> > >> abuse@panda:~$ ssh [email protected] > >> Trying 205.166.94.130... > >> Connected to 205.166.94.130. > >> Escape character is 'off'. > >> > >> TWENEX.ORG, PANDA TOPS-20 Monitor 7.1(21733)-4 > >> > >> If new, type 'new new' .. > >> > >> @ > >> > >>> without saying which password should be used ... > >> > >> You don't need a password, at least not for the ssh session > >> > > > > > > % ssh -v [email protected] > > OpenSSH_7.7p1, OpenSSL 1.0.2o-freebsd 27 Mar 2018 > > debug1: Reading configuration data /home/imp/.ssh/config > > debug1: /home/imp/.ssh/config line 47: Applying options for * > > debug1: Reading configuration data /etc/ssh/ssh_config > > debug1: Connecting to sdf.org [205.166.94.16] port 22. > > debug1: connect to address 205.166.94.16 port 22: Network is unreachable > > ssh: connect to host sdf.org port 22: Network is unreachable > > % > > > > I wonder why I get a different IP address? > > Interesting. I get the same address as you do. I double checked with > some other DNS servers -- 8.8.8.8 is an easy one to remember and reliably > reachable. They all show the .16 address. > > But I can connect just fine, so it seems that you have a connectivity > issue somewhere on the path. Traceroute to the rescue? > > paul > > > -- stéphane tsacas
