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By: falcon | September 19, 2017

Last week I got an email from the abuse department of my ISP.  Their automated message said that there is a service with an exploitable vulnerability running on "one of my devices".  Apparently it was SSDP - the Simple Service Discovery Protocol, which can be used to facilitate a DDoS attack.


Their system found that this SSDP service was available on UDP port 32788.


This could be one of the users of my shell server violating the terms of service, or it could be unrelated to the shell server altogether.  I tried to log into my modem, and found that the administrative web page would not load.  Even though the Internet connection was up, this part of my modem was down.  So I power cycled the modem.


 When it...

Category: Uncategorized 

Tags: security, ports, abuse 

By: falcon | January 17, 2017

In setting up this service, I put my own time and money into it without expecting anything in return.


I intend to create an environment which supports learning how to use unix-like systems, learning programming, and learning how computers work at a better level than most people do.


I did not set up the service for criminals to take advantage of innocent people.  I recently invited the police over to my house to investigate suspicious activity on my server, something I was greatly displeased with having to do.  But I will do it again if necessary.


If there was ever an idea that a free shell service is a safe place to commit crimes without anyone noticing or caring, THIS IS NOT THE CASE HERE.


There is only so much that one can do to pre...

By: falcon | January 09, 2017

On December 31st, 2016, I changed the network scheme for the server.  It was set to DMZ and now it is not.  I forwarded ports 22 and 80 for the essential functioning of my shell service.  This effectively closed all other incoming ports for users of the server.  Quite a few of the users were running IRC bouncers, and I am aware that this has interrupted service for those users.


Since one of the reasons to close the ports was for increased security, I need to take some time to get a better understanding of the security issues surrounding this before I make a decision.  Originally, my intention was to provide an environment for learning and practice at the command line, which really doesn't need any ports to be opened.


...

By: falcon | June 27, 2016

The first consideration has come to me.  What kind of security do I need to operate a free shell account server?  How much of a risk am I taking if I don't have the proper security set up?  Of course, none of this is an issue if I have only good people using my system.  So then the question arises, how to filter out the bad ones?  And if a bad one gets an account after all, how much work will it take to spot them and kick them out?


So far, nobody has contacted me to express interest in a shell account (the site still doesn't show up on Bing).  I don't know what kind of demand there will be.  I have one idea, which is to only allow users from the Greater Toronto Area (where I am located) to have a shell account.  This way I could actually get...

Category: Uncategorized 

Tags: shell, security