If you are running behind a proxy like NGiNX or what have you, only then you should check for ‘x-forwarded-for’: var ip = req.headers[‘x-forwarded-for’] || req.socket.remoteAddress If the proxy isn’t ‘yours’, I wouldn’t trust the ‘x-forwarded-for’ header, because it can be spoofed.
This information can be found in os.networkInterfaces(), — an object, that maps network interface names to its properties (so that one interface can, for example, have several addresses): ‘use strict’; const { networkInterfaces } = require(‘os’); const nets = networkInterfaces(); const results = Object.create(null); // Or just ‘{}’, an empty object for (const name of … Read more
Use grep to filter IP address from ifconfig: ifconfig | grep -Eo ‘inet (addr:)?([0-9]*\.){3}[0-9]*’ | grep -Eo ‘([0-9]*\.){3}[0-9]*’ | grep -v ‘127.0.0.1’ Or with sed: ifconfig | sed -En ‘s/127.0.0.1//;s/.*inet (addr:)?(([0-9]*\.){3}[0-9]*).*/\2/p’ If you are only interested in certain interfaces, wlan0, eth0, etc. then: ifconfig wlan0 | … You can alias the command in your .bashrc … Read more
127.0.0.1 is normally the IP address assigned to the “loopback” or local-only interface. This is a “fake” network adapter that can only communicate within the same host. It’s often used when you want a network-capable application to only serve clients on the same host. A process that is listening on 127.0.0.1 for connections will only … Read more
In your request object there is a property called socket, which is a net.Socket object. The net.Socket object has a property remoteAddress, therefore you should be able to get the IP with this call: request.socket.remoteAddress (if your node version is below 13, use the deprecated now request.connection.remoteAddress) EDIT As @juand points out in the comments, … Read more
/sbin/ip route|awk ‘/default/ { print $3 }’ As @MichaelNeale noticed, there is no sense to use this method in Dockerfile (except when we need this IP during build time only), because this IP will be hardcoded during build time.
45 characters. You might expect an address to be 0000:0000:0000:0000:0000:0000:0000:0000 8 * 4 + 7 = 39 8 groups of 4 digits with 7 : between them. But if you have an IPv4-mapped IPv6 address, the last two groups can be written in base 10 separated by ., eg. [::ffff:192.168.100.228]. Written out fully: 0000:0000:0000:0000:0000:ffff:192.168.100.228 (6 … Read more