Cryptanalysis

Hello!

I’m struggling to interact with the server for this challenge. I’m using Putty 0.70 on a Windows 7 Pro workstation.

I had to tweak Putty’s Telnet settings to even get a stable connection (had to change the telnet negotiation mode from the default value (active) to passive).
After that I got a poorly formatted greeting message with a prompt and three options, but then whatever command I send I always get the same prompt in response. (See screenshot)
I also tried connecting with a simple "telnet" command via cmd.exe or powershell, and I’m getting the same behavior.
I also tried changing some other settings available in Putty, especially the behavior of the return key, as Putty support sending a New Line and a ^M : both have the same behavior...

Apologies if that’s part of the challenge, but I doubt it, so... If anybody has any idea of what’s wrong with my setup, I’d love to hear about it.

Thanks for the help anyone :)

For windows, you can download ncat.

For instance, you can have it in the nmap.zip :
https://nmap.org/dist/nmap-7.80-win32.zip

Then, with DOS command go to the folder where ncat.exe is and then :
ncat challenge01.root-me.org 51035