ports

I have been reading a lot about different NAT traversal techniques, but I am still a little unclear about how it works. If I open a TCP port on a client machine and send a request to some arbitrary nonexistent server (which won't respond), my client NAT will now have an open channel, correct? Can I then use another (unknown) computer at a different IP address to access that client port if I know both the public and private IP of the client as well as the port number? Or will my NAT check where my server packet is coming from and block it since it is not from the same IP address as the original

I am using a COM port in C++. I can not open COM ports with a higher number than 9, for example 10. This is function used for COM port detection: WCHAR port_name[7]; WCHAR num_port[4]; for (i=1; i<256; i++) { bool bSuccess = false; wcscpy(port_name,L"COM"); wcscat(port_name,_itow(i,num_port,10)); HANDLE hPort; //Try to open the port hPort = CreateFile(L"COM10", GENERIC_READ | GENERIC_WRITE, 0, 0, OPEN_EXISTING, 0, 0); //hPort = CreateFile(port_name, GENERIC_READ | GENERIC_WRITE, 0, 0, OPEN_EXISTING, 0, 0); if (hPort == INVALID_HANDLE_VALUE) { DWORD dwError = GetLastError(); //Check to see if

Conventional IPv4 dotted quad notation separates the address from the port with a colon, as in this example of a webserver on the loopback interface: 127.0.0.1:80 but with IPv6 notation the address itself can contain colons. For example, this is the short form of the loopback address: ::1 How are ports (or their functional equivalent) expressed in a textual representation of an IPv6 address/port endpoint? Nico They work almost the same as today. However, be sure you include [] around your IP. For example : http://[1fff:0:a88:85a3::ac1f]:8001/index.html Wikipedia has a pretty good article about

I am using Apache Spark to run machine learning algorithms and other big data tasks. Previously, I was using spark cluster standalone mode running spark master and worker on the same machine. Now, I added multiple worker machines and due to a tight firewall, I have to edit the random port of worker. Can anyone help how to change random spark ports and tell me exactly what configuration file needs to be edited? I read the spark documentation and it says spark-defaults.conf should be configured but I don't know how I can configure this file for particularly changing random ports of spark. check

I'm working on my first Java site. I'm running Apache Tomcat on port 8080, and Apache HTTPD on port 80. The current URL that I can access the site at is (for example) 123.4.5.6:8080. I want to remove the port number from the URL before I point the domain at the new IP. At the moment I am only using Apache for phpmyadmin, however I plan on using it for CGI scripts and other stuff once I figure out mod_jk etc... So I don't want to change Tomcat's port to 80 and turn off Apache. I hope this makes sense. The correct way to do things is to leave Apache at 80 and Tomcat at 8080 and use a plug in

I'm playing with boot2docker (docker 1.6) on windows 8.1. I wanted to make myself machine container to play with ruby and I want to be able to connect to rails server from my windows host. To start with small steps first I want to connect to my container from my boot2docker VM. I attach my docker file below, it builds without a problem and I can run a container from it. I do it like so: docker run -it -p 3000:3000 3564860f7afd /bin/bash Then in this container I say: cd ~/myapp && bundle exec rails server -d And to see if everything is working I do: ~/myapp$ sudo apt-get install wget && wget