Comments for Piece of Unix Hints

Comment on Trend / Prediction with RRDtool by teguh iskanto

teguh iskanto — Tue, 15 Jun 2010 17:12:25 +0000

This is one of the best RRD trick that I can find on the web, thank you & write more please. I look forward to seeing another magic trick from you.

Comment on Telnet Network Virtual Terminal (NVT) by Jeb

Jeb — Mon, 24 May 2010 17:34:41 +0000

@DaveRandom
Thanks, I fixed Point 1 and Point 2.
Regarding AYT, it’s described in RFC 854, you don’t need to either put DO or WILL, just do IAC AYT, there is no need for WILL/DO/.. as it’s just a query.

Comment on Telnet Network Virtual Terminal (NVT) by DaveRandom

DaveRandom — Fri, 14 May 2010 11:43:38 +0000

Thanks a lot for this, it is by far and away the most useful page on the entire internet relating to this subject.

Two points, and one question…

Point 1: The RFC links above no longer seem to be valid – I keep getting timeouts and Googling them instead
Point 2: Window Size (\x1f) is missing from the option list above

Question: Which RFC details how AYT (\xf6) should be handled? I’m would assume it would be IAC DO AYT/IAC WILL AYT but this seems to produce varying odd results with puttytel…

Comment on Telnet Network Virtual Terminal (NVT) by Jeb

Jeb — Thu, 06 May 2010 21:11:07 +0000

@Ajay
According to http://web.bilkent.edu.tr/History/einet/hytelnet/TELNET.html it seems it’s highly dependent of your telnet client.

Comment on Trend / Prediction with RRDtool by blob

blob — Thu, 06 May 2010 10:35:42 +0000

Very useful, thanks

Comment on Per virtual user sa-learn training by Jeb

Jeb — Wed, 03 Feb 2010 06:54:34 +0000

@Aaron Tate That's strange, still working as describe for me.

Comment on Per virtual user sa-learn training by Aaron Tate

Aaron Tate — Wed, 03 Feb 2010 05:31:46 +0000

Just an addendum as this behavior might be new since 2008, not sure but now spamd requires an additional parameter –nouser-config otherwise it simply ignores the –virtual-config-dir arg.

Had me scratching my head for a good hour.

Comment on Telnet Network Virtual Terminal (NVT) by Ajay

Ajay — Wed, 27 Jan 2010 16:18:33 +0000

How do I send BRK command over telnet? I mean which combination of keys would generate brk value and send it over telnet. Initially I thought ctrl-c or ctrl-break would do that, but when I capture on ethereal I can see only 03 is being sent out.

It would be great if you could throw some light on this.

Thanking you in anticipation

Comment on Telnet Network Virtual Terminal (NVT) by rick

rick — Sat, 11 Apr 2009 09:08:48 +0000

Wow, I’ve been searching for a tutorial on this for… weeks. Thanks so much!

Ported to Ruby, it’s something like:
s.flush
s.write “Username: ”
username = s.gets.chomp.gsub(/[^(\x20-\x7F)]*/,”) # clear out weird non-ascii stuff
s.write “\xff\xfb\x01″
s.flush
s.write “Password: ”
password = s.gets.chomp.gsub(/[^(\x20-\x7F)]*/,”) # clear out weird non-ascii stuff…again.
s.write “\xff\xfd\x22″
s.flush

Where s is the socket variable.