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The Perils of Port 513
A.K.A: How to piss off a Linux Administrator in three easy steps
By Confucious
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DISCLAIMER: the Author of this file is not responsible for any illegal use
of the information contained within. This file is for eduational purposes only.
Anyone who uses the information in this file is not only breaking the law but
extremely fuckin up someone's system and pissing them off!
RedHat Linux v. 5.1 has a serious problem in it's networking. I found
this out by sending a few messages to the rlogind port, (port 513) on my
Linux box after seeing it mentioned in my /etc/services file. What happened was
: I was looking through my /etc/services file when I saw an entry named login.
I noted the port number then switched to another virtual terminal. Then I
telnetted to port 513 and entered the user name root. The thing just
disconnected me, so I tried again using my non-priveledged account confucious.
Still no feedback. Naturally I gave up on that being very useful.
Later on, I figured that I would make a few changes to my bootloader, so
I tried to su to root. Alas, that did not work. So I logged out then tried to
log back in as root. Still didn't work.
Here is a transcript:
[confucious@localhost /]$ su root
su: invalid password
## This seems wrong because su usually asks for a password.
[confucious@localhost /]$ exit
logout
## clearscreen
Red Hat Linux release 5.1 (Manhattan)
Kernel 2.0.35 on an i586
login: root
Invalid Password.
login: confucious
Invalid Password.
## This is extremely weird as I haven't even entered a password yet!?!?
And this is what happens when you send shit to Port 513 on RedHat 5.1. Damn!
Also, this problem was not fixed by reboot. I had to re-install to get it
working again. Now wouldn't that piss you off?
If you use the information provided in this file please send email to:
confucious@softhome.net
Adios, Confucious.
port 513 is evil.