![]() The authors had been working with Gérard Le Lann to incorporate concepts from the French CYCLADES project into the new network. In May 1974, Vint Cerf and Bob Kahn described an internetworking protocol for sharing resources using packet switching among network nodes. However, there are vulnerabilities in TCP, including denial of service, connection hijacking, TCP veto, and reset attack. TCP employs network congestion avoidance. Applications that do not require reliable data stream service may use the User Datagram Protocol (UDP) instead, which provides a connectionless datagram service that prioritizes time over reliability. Three-way handshake (active open), retransmission, and error detection adds to reliability but lengthens latency. The server must be listening (passive open) for connection requests from clients before a connection is established. TCP is connection-oriented, and a connection between client and server is established before data can be sent. Major internet applications such as the World Wide Web, email, remote administration, and file transfer rely on TCP, which is part of the Transport Layer of the TCP/IP suite. TCP provides reliable, ordered, and error-checked delivery of a stream of octets (bytes) between applications running on hosts communicating via an IP network. Therefore, the entire suite is commonly referred to as TCP/IP. It originated in the initial network implementation in which it complemented the Internet Protocol (IP). The Transmission Control Protocol ( TCP) is one of the main protocols of the Internet protocol suite. Transmission Control Protocol Protocol stack ![]() Save the changes to the configuration file and reconnect to your servers, the connection should now always be active as long as the terminal process is open (feel free to watch a youtube video and return to your workplace without losing the connection to your server □).Principal protocol used to stream data across an IP network Your configuration file should look like this after making the modification: If you need to keep the connection alive only on certain hosts, you may specify the configuration as well like this: Host In case that this value is not enough and your connections keep dropping, lower this value to your needs (e.g to 10 seconds). With this configuration the header will be sent every 30 seconds and it should keep the connection alive. If you want to do this globally (to any host you may connect, the keep alive header will be sent), configure it like this: Host * Scroll down to the end of the file and add the parameter with a numeric value that corresponds to the interval in seconds in which the client will send a keep alive header and will prevent the connection from dropping. This adjustment can be done for every SSH connections or for a specific host. Now all you need to do is to add the ServerAliveInterval parameter to your settings. In any of this files, you will have to make the modification of the next step to keep connections alive. You can modify it using the following command ( for more information about this configuration file, read the man page here): sudo nano /etc/ssh/ssh_configĪlternatively if you don't want to make the modifications at system-wide level but at current user level, modify instead the ~/.ssh/config file: sudo nano ~/.ssh/config In MacOS is located at /etc/ssh/ssh_config. The first things you need to do is to locate the SSH system-wide configuration file of the system. Modify your OpenSSH SSH client configuration file I noticed after a few connections that if I didn't type anything for about 5 minutes, the connection would simply close and I needed to connect again.Īs I always do this of opening a SSH connection, I stay afk for a while and then use it again, I had to research how do configure it to work properly and I will share with you how to keep your SSH connections open in MacOS Monterey. I use Putty in Windows to connect to my servers, however in this case, I decided to use the OpenSSH builtin cli utility in the MacOS terminal. During this travel I had to connect to a server through SSH and run some scripts. In a travel I made recently, I had to work with my Macbook Pro as this was the laptop I choosed for this travel. As a regular Windows user, I tend to have problems with pretty basic stuff in MacOS as I'm not used to work with it daily.
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