ipv6

Get IPv4 addresses from Dns.GetHostEntry()

由 微笑、不失礼 提交于 2019-11-26 06:37:46
问题 I\'ve got some code here that works great on IPv4 machines, but on our build server (an IPv6) it fails. In a nutshell: IPHostEntry ipHostEntry = Dns.GetHostEntry(string.Empty); The documentation for GetHostEntry says that passing in string.Empty will get you the IPv4 address of the localhost. This is what I want. The problem is that it\'s returning the string \"::1:\" on our IPv6 machine, which I believe is the IPv6 address. Pinging the machine from any other IPv4 machine gives a good IPv4

required iPv6 compatibility - iOS app rejected by apple

由 我是研究僧i 提交于 2019-11-26 06:36:12
问题 after June 1, I submit my ionic app to itunes connect and I got the message from apple. Apps are reviewed on an IPv6 network. Please ensure that your app supports IPv6 networks , as IPv6 compatibility is required. For information about supporting IPv6 Networks, refer to Supporting iPv6 DNS64/NAT64 Networks. For a networking overview, please see About Networking. I have used AFNetworking for API call. Please help to find out the solution for the same. Thanks. 回答1: If you are using IPv4

Working with IPv6 Addresses in PHP

由 两盒软妹~` 提交于 2019-11-26 05:24:05
问题 After searching around somewhat thoroughly, I noticed a slight lack of functions in PHP for handling IPv6. For my own personal satisfaction I created a few functions to help the transition. The IPv6ToLong() function is a temporary solution to that brought up here: How to store IPv6-compatible address in a relational database. It will split the IP in to two integers and return them in an array. /** * Convert an IPv4 address to IPv6 * * @param string IP Address in dot notation (192.168.1.100) *

How to store IPv6-compatible address in a relational database

由 霸气de小男生 提交于 2019-11-26 03:34:21
问题 How do I do that? Right now, IPv6 will not be used, but I need to design the application to make it IPv6-ready. It is necessary to store IP addresses and CIDR blocks (also BGP NLRI, but this is another story) in a MySQL database. I\'ve alway used an INT for IPv4 + a TINYINT for masklen, but IPv6 is 128 bit. What approach will be best for that? 2xBIGINT ? CHAR(16) for binary storage? CHAR(39) for text storage? 8xSMALLINT in a dedicated table? What would you recommend? 回答1: I'm not sure which

How to get my IP address programmatically on iOS/macOS?

由 帅比萌擦擦* 提交于 2019-11-26 00:50:01
问题 I would like to obtain my iPad\'s IP address programmatically. How can I query the networking subsystem to find out what my IPv4 (and IPv6) addresses are? PS: Can I disable IPv6 somehow? 回答1: The following code finds all IPv4 and IPv6 addresses on an iOS or OSX device. The first getIPAddress method acts more or less as the older code in this answer: you can prefer either one or the other type address, and it always prefers WIFI over cellular (obviously you could change this). More

Regular expression that matches valid IPv6 addresses

由 时间秒杀一切 提交于 2019-11-26 00:09:42
问题 I\'m having trouble writing a regular expression that matches valid IPv6 addresses, including those in their compressed form (with :: or leading zeros omitted from each byte pair). Can someone suggest a regular expression that would fulfill the requirement? I\'m considering expanding each byte pair and matching the result with a simpler regex. 回答1: I was unable to get @Factor Mystic's answer to work with POSIX regular expressions, so I wrote one that works with POSIX regular expressions and

IPv4与IPv6的区别是什么？

由 瘦欲@ 提交于 2019-11-25 23:47:13
IPv6 与IPv4的区别主要有以下几点： 1. IPv6 的地址空间更大。IPv4中规定IP地址长度为32,即有2^32-1个地址；而 IPv6 中IP地址的长度为128,即有2^128-1个地址。夸张点说就是，如果IPV6被广泛应用以后，全世界的每一粒沙子都会有相对应的一个IP地址。 2.IPv6的路由表更小。IPv6的地址分配一开始就遵循聚类(Aggregation)的原则,这使得路由器能在路由表中用一条记录(Entry)表示一片子网,大大减小了路由器中路由表的长度,提高了路由器转发数据包的速度。 3.IPv6的组播支持以及对流的支持增强。这使得网络上的多媒体应用有了长足发展的机会，为服务质量控制提供了良好的网络平台。 4.IPv6加入了对自动配置的支持。这是对 DHCP协议 的改进和扩展，使得网络(尤其是局域网)的管理更加方便和快捷。 5.IPv6具有更高的安全性。在使用IPv6网络中，用户可以对网络层的数据进行加密并对IP报文进行校验，这极大地增强了网络安全。 扩展资料： IPv6是IETF（互联网工程任务组）设计的用于替代现行版本IP协议（IPv4）的下一代IP协议，号称可以为全世界的每一粒沙子编上一个网址。由于IPv4最大的问题在于网络地址资源有限，严重制约了互联网的应用和发展。IPv6的使用，不仅能解决网络地址资源数量的问题，而且也解决了多种接入设备连入互联网的障碍

NA西游第八难：IPv6

由 你。 提交于 2019-11-25 23:18:45
IPv6 IPv6(Internet Protocol Version 6)是网络层协议的第二代标准协议，也被称为IPng（IP next generation，下一代IP协议）。 IPv6的IP地址长度为128bit，被分为8组，每组的16bit用4个十六进制字符（0-9，A-F）来表示，组和组之间用冒号隔开。书写中，每组中的前导“0”以及连续的“0”可以用双冒号“::“来代替，但一个地址中双冒号只能出现一次。 IPv6地址有两部分，前64bit是网络前缀，后64bit相当于v4地址中的主机ID 配置IPv6单播地址 全局开启IPv6 [r1]ipv6 [r2]ipv6 接口开启IPv6 [r1-GigabitEthernet0/0/0]ipv6 enable [r2-GigabitEthernet0/0/0]ipv6 enable 接口配置自动生成的链路本地地址 [r1-GigabitEthernet0/0/0]ipv6 address auto link-local [r2-GigabitEthernet0/0/0]ipv6 address auto link-local 查看自动生成的地址 [r1]display ipv6 interface GigabitEthernet0/0/0 current state : UP IPv6 protocol current

Is there a way for non-root processes to bind to “privileged” ports on Linux?

由 拥有回忆 提交于 2019-11-25 22:59:27
问题 It\'s very annoying to have this limitation on my development box, when there won\'t ever be any users other than me. I\'m aware of the standard workarounds, but none of them do exactly what I want: authbind (The version in Debian testing, 1.0, only supports IPv4) Using the iptables REDIRECT target to redirect a low port to a high port (the \"nat\" table is not yet implemented for ip6tables, the IPv6 version of iptables) sudo (Running as root is what I\'m trying to avoid) SELinux (or similar)

IPv6系列-详解自动分配IPv6地址

由 ≡放荡痞女 提交于 2019-11-25 20:37:01
深入研究自动分配IPv6地址的Stateless(无状态)与Stateful(有状态)方式 小慢哥的原创文章，欢迎转载 目录 ▪ 一. Link-Local Address的生成方式 ▪ 二. Global Address的生成方式 ▪ 三. RA报文中3个关键的Flag ▪ 四. 流程示意图 ▪ 五. 测试获得IP效果 ▪ 六. 应用场景（选择无状态还是有状态） ▪ 七. 后续内容 ▪ 附. 参考文档 一. Link-Local Address的生成方式 生成“链路本地地址”，有2种方式 ▷ 手动配置 ▷ 自动配置 其中“自动配置”根据算法，又分为 ▷ eui64：根据mac地址换算而来 ▷ stable_secret：跟随网络环境的变化而变化，处于固定网络环境时其值将固定 ▷ random：随机生成 二. Global Address的生成方式 生成“全球单播地址”（或者“唯一本地地址”），有2种方式 ▷ 手动配置 ▷ 自动配置 其中“自动配置”根据获取方式，又分为 ▷ 无状态（Stateless）：根据路由通告报文RA（Router Advertisement）包含的prefix前缀信息自动配置IPv6地址，组成方式是Prefix + (EUI64 or 随机)。Stateless也可以称为SLAAC（Stateless address autoconfiguration）
订阅 ipv6