>>>>> Some mailers offer telnet as a method of transferring >>>>> messages/files, kind of like binkp does. >>>> ITN means "ifcico with Telnet-style connection control" >>> Yes, BBBS provides a telnet mailer interface which operates as >>> Nick and you mention. It is a mailer interface, not for users, >> Does it really use Telnet-style connection control? >> If yes, I'd like to see the full session recording (with `tcpdump`). JK> Yes, it uses telnet connections via mailer: JK> 75.117.66.119.23 > 72.43.242.234.52263: Flags [P.], cksum 0xf087 JK> (correct), seq 795:797, ack 441, win 33600 JK> 0x0000: 4500 0036 814b 0000 2c06 4475 4b75 4277 JK> 0x0010: 482b f2ea 0017 cc27 64f2 602d 8629 f872 JK> 0x0020: 8018 8340 f087 0000 0101 080a 0000 9fdf JK> 0x0030: 10e6 29d9 4f4f
Here I see just a TCP header of a connection from 72.43.242.234:52263 to 75.117.66.119:23, but no transferred data (with or without Telnet-style connection control codes).
JK> I hope this clip is enough to see it..
TCP connection to the port 23 doesn't make it Telnet. Any port may be used for any purpose... for example. I use port 443 for both binkp and ssh to circumvent stupid proxies configured by stupid people.
JK> I saved the whole connection session though if you want to see it all JK> - there were a number of other connections via binkp with other nodes JK> at the time.
`tcpdump -s 2048 -nlvvvX tcp and host 75.117.66.119` would record what you actually want to show.
JK> This is a pw protected session with 1:3634/12's telnet node.
Could you perform unprotected empty session?
JK> I don't usually use this tool so at the moment the results mean JK> nothing to me <g>
I do use it. And the results will tell me everything :-)
-- Alexey V. Vissarionov aka Gremlin from Kremlin gremlin.ru!gremlin; +vii-cmiii-ccxxix-lxxix-xlii
