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1

You can with hping3 for example by sending a SYN Package to the host: hping3 -S -V host If it is a Webserver you know that port 80 would be open and can send SYN packets to that port hping3 -S -V -p 80 host Or scan the host for any open ports to which you could send packets and he will reply.


0

When you say Ports, I am assuming you're talking about ports that are used in TCP and UDP. In that case, each IP address has ports that run from 1-65,535 for TCP, and 1-65,535 for UDP. As far as IPv6 is concerned, it uses the same ports, you simply need to put square brackets ([]) around your address to differentiate between the address portion and the port ...


0

You can use the 'nc' command, it comes with cygwin nc -l 2204 | nc 127.0.0.1 2207 or this port remapper has a GUI http://www.kmint21.com/free/ pm.exe <lp> <rip> <rp> [w] [h] lp - local port rip - remote ip rp - remote port w - write log h - hidden mode or ssh making a connection to yourself 127.0.0.1 and forward to ...


0

We have finally solved this issue after days passed by looking for solution, researching and trying our alternatives. Finally it works now. I will give details about our working configuration. Actually it is simple. We both use official OpenVPN clients to connect to VPN. This is necessary. Windows let you connect directly to VPN without using third party ...


28

There's a lot of layers to this. And importantly, many of them are interchangeable. For example, you can have a coax-cable network, an ethernet, or a Wi-Fi down at the physical level. HTTP works on top of all of those, but each of them has a slightly different handling of the payload being sent around. HTTP works on top of another protocol, called TCP, ...


0

I guess the web server registers call back functions with the port. So that whenever anything is received on that particular port, the system calls that call back function registered earlier. Inside that call back, it may set an event or something like that and then the webserver would have a dedicated thread waiting on that event. This thread will run and ...


3

Webserver notified with the following process Accept () Liseten() bind() socket() Say webserver listens on port 80, when the request from client comes on port 80, it will accept a connection with the accept() system call. This call typically blocks until a client connects with the server. Then Listen for connections with the listen() system call and ...


10

Computers use a concept called "ports", analogous to "extensions" for a telephone switchboard: The client is not only "calling" the server IP address, but also sends the request to a specific port on that server. There are thousands of ports (wikipedia list), e.g. port 80 is the default for HTTP. The trick is that a program, e.g. a webserver, can register ...


0

You have /var/log/apache2 directory with the following directory: access.log error.log other_vhosts_access.log It's related to you want from client, and how to notify, sms, email , and so on. My suggesstion: You can create an log server and send every your log such as mail server , dns server , web server and so on, Then you can parse it, Even same ...



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