Re: Net::Telnet on Win2K

[Kevin Pendleton]

John,

The problem is outlined in the Net:Telnet documentation. The "loads of gibberish" is ANSI terminal escape characters. I haven't worked with that exact telnet application, but some allow you to turn ANSI off and on....

http://search.cpan.org/author/JROGERS/Net-Telnet-3.03/lib/Net/Telnet.pm

Connecting to a Remote MS-Windows Machine

By default MS-Windows doesn't come with a TELNET server. However third party TELNET servers are available. Unfortunately many of these servers falsely claim to be a TELNET server. This is especially true of the so-called "Microsoft Telnet Server" that comes installed with some newer versions MS-Windows.

When a TELNET server first accepts a connection, it must use the ASCII control characters carriage-return and line-feed to start a new line (see RFC854). A server like the "Microsoft Telnet Server" that doesn't do this, isn't a TELNET server. These servers send ANSI terminal escape sequences to position to a column on a subsequent line and to even position while writing characters that are adjacent to each other. Worse, when sending output these servers resend previously sent command output in a misguided attempt to display an entire terminal screen.

Connecting Net::Telnet to one of these false TELNET servers makes your job of parsing command output very difficult. It's better to replace a false TELNET server with a real TELNET server. The better TELNET servers for MS-Windows allow you to avoid the ANSI escapes by turning off something some of them call console mode.

Kevin

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