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From Adam Stuckey <adam.stuc...@marconi.com.au>
Subject [Net-Telnet] Line feed problems with login
Date Mon, 01 Aug 2005 12:31:29 GMT
Hi All,

I am having a strange problem when trying to log into a remote system via
telnet.
My code works when logging into a Sun Solaris or HP-UX machine, but fails
when connecting to a particular device (a type of modem).
When I send the username, I append a "\r" to the end.  The remote device
immediately responds with "Invalid Password", before even asking my program
to enter the password.  I have ran an ethereal packet trace of what is
happening, and it appears that when I send "username\r", "username\r\n" is
actually sent to the remote system.  The remote system interprets this as
two enter presses, and believes a blank password was entered. Similarly, if
I send "username\n", "username\r\n" is actually sent to the remote node,
causing the same issue.
Is there a way to either prevent this additional "\n" being appended?  I am
using the out.write( byte ) method rather than out.writeln( byte[] ) so I
don't know where the additional "\n" is coming from.

Regards,
Adam


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