How to unsupress local echo

Question

I am trying to suppress the local echo of a password in a telnet session by sending 0xFF 0xFD 0x2D (IAC DO SUPPRESS_LOCAL_ECHO). This works fine.

My trouble is en

Answer 1

Wrong sequence above. According to some document i found, my sequence should be wrong (WILL/WONT flipped). However it worked with Putty and MS Telnet - strange.

Please try this:

// Supress Echo on client:
out.write(0xFF);    // IAC
out.write(0xFB);    // WILL
out.write(0x01);    // ECHO

// Enable again with:
out.write(0xFF);    // IAC
out.write(0xFC);    // WONT
out.write(0x01);    // ECHO