ports

问题 I have a live video chat application and I use a TURN server which supports STUN/TURN and both UPD/TCP transmission. Sometimes users can be connected to the network which blocks that much ports and protocols that WebRTC connection just cannot happen (usually those are corporate networks). I would like to check if a WebRTC connection is possible before users try to connect to each other (actually, perform a technical check ). How can I do it? Ideas I have in my head: Try to download a hosted

问题 There are several examples of configuring the service bus environment to use http/https with C#, using the call: ServiceBusEnvironment.SystemConnectivity.Mode = ConnectivityMode.Http; My question is - can and how do I do this via a java client? 回答1: The newer versions of the SDK (1.0 and later) do not support HTTP connectivity (AMQP only), and the older ones do not support AMQP (HTTP only). As a result there's no "need" for connectivity mode settings. The Java SDK is AMQP only. If http is

问题 Is it possible in TCP for different processes not sharing the same executable image (so no fork() for example) to use a same client-side port on Windows, Linux or OSX? This is specifically related to the socket options SO_REUSEADDR and SO_REUSEPORT set using setsockopt() I believe. As far as I've read, I believe it is possible for the same process/image to do this, but I haven't found information as to multiple processes/images. I would imagine it is theoretically possible since each socket

问题 I am trying to open up port on my Ubuntu machine to allow me to connect the Mongo using an external program. I ran this which is the command line to open a new port: sudo iptables -A INPUT -p tcp --dport 27017 -j ACCEPT but when I ran this to check if the new rule was there... sudo netstat -ntlp | grep LISTEN ...the new port wasn't in the list - any ideas? 回答1: I think the mangodb instance was not started, apart from that , sudo netstat -ntlp | grep LISTEN gives the list ports that are active

问题 I am trying to open up port on my Ubuntu machine to allow me to connect the Mongo using an external program. I ran this which is the command line to open a new port: sudo iptables -A INPUT -p tcp --dport 27017 -j ACCEPT but when I ran this to check if the new rule was there... sudo netstat -ntlp | grep LISTEN ...the new port wasn't in the list - any ideas? 回答1: I think the mangodb instance was not started, apart from that , sudo netstat -ntlp | grep LISTEN gives the list ports that are active

来源： https://stackoverflow.com/questions/51620225/multiple-servers-on-node-js

问题 How do you get lsof to produce numeric port information instead of attempting to resolve the port to service name? For example, I want TCP *:http (LISTEN) to give me TCP *:80 (LISTEN) in-fact if at all possible I never want to see another service name in lsof print-out ever again. So if there is a way to make numeric ports the default I would like to understand how to do that as well. 回答1: Run lsof -P . According to man lsof, -P inhibits the conversion of port numbers to port names for

问题 My doubt is that - a port is just logical, so why such restriction ? Why can't I have a port of 9924593 or something like that ? 回答1: Look at the packet format for the TCP segment. The port identifiers are unsigned 16-bit integers, meaning that the largest number you can put in there is 2 16 -1 = 65535. 来源： https://stackoverflow.com/questions/36796183/why-is-the-maximum-port-range-65535-in-the-tcp-ip-suite

问题 My doubt is that - a port is just logical, so why such restriction ? Why can't I have a port of 9924593 or something like that ? 回答1: Look at the packet format for the TCP segment. The port identifiers are unsigned 16-bit integers, meaning that the largest number you can put in there is 2 16 -1 = 65535. 来源： https://stackoverflow.com/questions/36796183/why-is-the-maximum-port-range-65535-in-the-tcp-ip-suite

问题 My doubt is that - a port is just logical, so why such restriction ? Why can't I have a port of 9924593 or something like that ? 回答1: Look at the packet format for the TCP segment. The port identifiers are unsigned 16-bit integers, meaning that the largest number you can put in there is 2 16 -1 = 65535. 来源： https://stackoverflow.com/questions/36796183/why-is-the-maximum-port-range-65535-in-the-tcp-ip-suite