ipv6

I am trying to create an IPv6 TCP connection between two Android devices. However creating the socket always fails. If I instantiate it like this: Inet6Address dest = (Inet6Address) InetAddress.getByName(addressString); Socket socket = new Socket(dest, portNumber); I get the following exception: java.net.ConnectException: failed to connect to *address* (port *portNumber*): connect failed: EINVAL (Invalid argument) If I instead instantiate my IPv6Address object like this: Enumeration<NetworkInterface> networkInterfaces = NetworkInterface.getNetworkInterfaces(); NetworkInterface wifiInterface =

For fun, I'd like to better understand the building blocks or elements that are within an IPv6 address. Here are the basics, from my understanding: IPv6 addresses are 128 bits long (written as 8 blocks, each with 16 bits) Each block is encoded as hex digits between 0 and 0xffff. Leading zeroes may be omitted. One can append an IPv4 doted-quad address, and it will occupy the lower 32 bits of the IPv6 address. 1:2:3:4:5:6:200.201.202.203. (The rules for the IPv4 are as expected.) The IPv4 representation can only appear at the end. It is possible to use double colons syntax to represent one or

If I remember correctly it used to display "localhost" a few days ago. I am not sure what had changed that made server.address().address return double colons (::) instead. I read here that it returns an IPv6 address (::) if it is available but it's disabled on my PC. https://nodejs.org/api/http.html#http_server_listen_port_hostname_backlog_callback Alexander Mikhalchenko As the docs say, Begin accepting connections on the specified port and hostname. If the hostname is omitted, the server will accept connections on any IPv6 address (::) when IPv6 is available, or any IPv4 address (0.0.0.0)

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: How to force the requests library to use a specific internet protocol version for a get request? Or can this be achieved better with another method in Python? I could but I do not want to use curl … Example to clarify purpose: import requests r = requests.get('https://my-dyn-dns-service.domain/?hostname=my.domain', auth = ('myUserName', 'my-password')) 回答1: This is totally untested and will probably require some tweaks, but combining answers from Using Python “requests” with existing socket connection and how to force python httplib library

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: One of our Java program when started, it only listen on IPv6 (8080) e.g. # netstat -ntpl Proto Recv - Q Send - Q Local Address Foreign Address State PID / Program name tcp 0 0 0.0 . 0.0 : 22 0.0 . 0.0 :* LISTEN - tcp6 0 0 ::: 8080 :::* LISTEN - tcp6 0 0 ::: 22 :::* LISTEN - The problem is it is not accessible from outside (except localhost), to solve this, I have this manually add - Djava . net . preferIPv4Stack = true But this make the program is only for IPv4 network. Is it possible to do something like the sshd as above, both