On 4/7/25 11:07, Doug VE1LG via groups.io wrote:
If I try to telnet into my node (on my home LAN) from an older telnet client (i.e. MS-DOS or Mac System 7) I get the callsign prompt and after typing 1 or 2 characters several gibberish characters are printed on the screen and I can't type anymore. If, from one of these older telnet clients, I telnet into a Linux box I have on my LAN and then from there telnet into my node all is fine.
BPQ sends some telnet IAC (Interpret As Command) characters when you connect via what it thinks is a telnet connection
Last I looked at this at a low level BPQ sends
0xFF 0xFB 0x03 0xFF 0xFB 0x01
0xFF = Telnet IAC ('Interpret as Command')
0xFB = Telnet Sender Will (enable this option)
0x01 = echo (RFC 857)
0x03 = suppress go ahead (RFC 858)
Could this be what you are referring to?? These sequences are as old as the hills, but I wonder if these old clients may perhaps not implement it?
Just a guess, but you could verify the behavior by using something like netcat to send such a sequence to these old clients and see if they choke on that.
73 -Willem
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Dr. Willem A. Schreuder, President, Principia Mathematica
Address: 3835 Beaver Brook Canyon Road, Evergreen, CO 80439, USA
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