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How does an HTTP server distinguish between the request received from computers behind one router? 

by on March 5, 2013

Q: How does Http server distinguish between the request received from computers behind one router?

HttpServer operates on port 80. It receives and send only at port 80.
Computers behind the routers have local ip address which only works in local area network. This happens because it allow more computer to connect to internet. Allowing 1 public ip address which is usually given by ISP to be used by many. The way NAT routers distinguish between incoming data that which computer it belongs to behind it is by assigining a port to local ip address and saving this information. So if it sends something at ip it puts port with it.
But the conflict is here:
Http Server listens to port 80.
Yet Routers must use random ports to distinguish among computers connected to it.
So what am i missing.


How do I get a server with a bunch of IPs? 

by on August 26, 2012

Q: What is a server? I’m in a deal with someone and he wants me to get him a server with a bunch of IPs. Please explain the meaning of this?


How come I got kicked from a server and cannot get back on the server even from another computer? 

by on July 13, 2011

Q: i got kicked from a server for telling an admin he needs to earn respect its not given. i said nothing more. i changed my ip. still could not get back in. i was told my mac was banned i changed computers, still could not get in. do you know how they are keeping me out?


How do I set up a Moodle Server for Jbcourse? 

by on June 29, 2011

Q: How do i go about setting up a Moodle Server for Jbcourse which is a paramedic program online.

i don’t know how to start this us as far as requirements for a server? or how to actually put the software on the server.


Is there anyway to make it so a customer is not prompted when using a self signed ssl cert? 

by on March 1, 2011

Q: I have Site(s) Ani….i=1,..10 sites which communicate with site B to access a website/application. That’s simple enough.

However, the traffic is http well we primarily don’t need https on ipsec tunnel right?. But since attacks related to eavesdropping of traffic come a real reality once it gets terminated by the ipsec device on both sides.

I have two options either to purchase a third-party ssl certificate to encrypt the traffic between two nodes or use a custom made one.

I don’t want to use a custom made one because this make the browser prompt an ugly untrusted certificate message; its ugly not from security perspective but for clients inconvenience and assuring users confidence in our systems is a critical issue for us.

Based upon above discussion i have the following two queries:-

a) How its possible to remove ugly certifcate message from user screen? Does the company need to register its certificate to some kind of CA body? or what …

b) Due to some tcp acceleration issues, ssl traffic slows down the traffic between the nodes so we only require the encryption to stand just during the initial handshake when the username and password are being validated ; after that we

want to revert back to http? Could this be achieved? If yes how…?

Thanks for your help.


Are there any good free forum hosts that can later be upgraded to pay as my forum grows? 

by on September 28, 2010

Q: I am considering making a website, that would have most traffic based around its forum.

I would start “small”, so I would want a free forum. I need one that is reasonably professional, “admin-friendly” and very customizable. What would you recommend? I would probably want there to be an option to upgrade my forum (i.e. end up paying for it)…

And, what hosts should I be looking at?


Is it possible for me to install MySQL on my University web space? 

by on August 8, 2010

Q: I have web space at my University. I want to install wordpress without having to use their database mysql stuff. I can upload whatever I want using Core FTP. Is there a work around for this?


If I upload music to a widget does it take up space on my website? 

by on August 1, 2010

Q: I have a small limit on the storage space on my website. I embedded a widget that plays music I make. I can upload up to a lot of music (10 GB) into the widget, which is basically an infinite amount of storage for me. Will the music in my widget eat up the storage space on my website, or will it take up virtually 0 space.


Is there anyway for me to take over an abandoned website? 

by on November 1, 2009

Q: I’ve discovered a website that appears to have been abandoned since 2003. However, the domain name is active until 2015. I have tried contacting the owner but I received no reply. Is there any way for me to commandeer, take over, the site? I would use my own domain name.


Can I access my Ubunto server via FTP? 

by on October 6, 2009

Q: I have set up my Ubunto server and I installed Apache 2 on it. My web server is working fine. My question is how can I access index.html from outside? I am not going to edit the file using nano or vim! Is there a way to access that from outside, like FTP?