ipv6

Matching IPv6 address to a CIDR subnet

由 有些话、适合烂在心里 提交于 2019-11-27 15:11:09
问题 Is there a good way to match an IPv6 address to an IPv6 subnet using CIDR notation? What I am looking for is the IPv6 equivalent to this: Matching an IP to a CIDR mask in PHP 5? The example given above can't be used since an IPv6 address is 128 bits long, preventing the bitwise left-shift from working properly. Can you think of any other way? EDIT: Added my own solution to the list of answers. 回答1: Since you cannot convert IPv6 addresses to integer, you should operate bits, like this: $ip=

IPv6 parsing in C

由 社会主义新天地 提交于 2019-11-27 14:58:04
问题 I wanted to know how I can parse an IPv6 address in C and convert it to a 128 bit value? So a hex address like 1:22:333:aaaa:b:c:d:e needs to be converted to its 128 bit equivalent binary. The problem is the IP address could be of the type ::2 and its variant since they are valid IPv6 address. The input is from the keyboard and hence is in ASCII format. 回答1: You can use POSIX inet_pton to convert a string to a struct in6_addr . #include <arpa/inet.h> ... const char *ip6str = "::2"; struct in6

Conversion IPv6 to long and long to IPv6

由 坚强是说给别人听的谎言 提交于 2019-11-27 14:41:34
问题 How should I perform conversion from IPv6 to long and vice versa? So far I have: public static long IPToLong(String addr) { String[] addrArray = addr.split("\\."); long num = 0; for (int i = 0; i < addrArray.length; i++) { int power = 3 - i; num += ((Integer.parseInt(addrArray[i], 16) % 256 * Math.pow(256, power))); } return num; } public static String longToIP(long ip) { return ((ip >> 24) & 0xFF) + "." + ((ip >> 16) & 0xFF) + "." + ((ip >> 8) & 0xFF) + "." + (ip & 0xFF); } Is it correct

How to convert an address from IPv4 to IPv6

由 久未见 提交于 2019-11-27 14:32:08
问题 Is this possible? How can you convert an ipv4 to an ipv6 address? a few example from here: 0.0.0.0 -> :: 127.0.0.1 -> ::1 I'm searching a solution in Java. Thanks, 回答1: There is no IPv4 to IPv6 mapping that is meaningful. things like 0.0.0.0 and 127.0.0.1 are special cases in the spec, so they have equivalent meaning. But given an IPv4 address it tells you nothing about what its specific IPv6 address would be. You can use a DNS lookup to see if a given IP address resolves to a host which in

IIS Request.UserHostAddress returning IPV6 (::1), even when IPV6 disabled

由 心已入冬 提交于 2019-11-27 13:29:19
In the properties section of my network card, on windows server 2008, i have IPV6 disabled, leaving only IPV4 enabled. However in ASP.NET, Request.UserHostAddress returns '::1', an IPV6 address. Has anyone got any idea how to revert back to IPV4? If you're connecting to localhost (::1 / 127.0.0.1), you're not using the network card that your server has, but rather like a virtual card that windows has. I don't think there is anyway to configure the loopback card and removing IPv6 from it, not without removing support from the whole system, but in Win2008 you probably can't do that anymore. You

Configure git to use IPv4 instead of IPv6 by default

由 ⅰ亾dé卋堺 提交于 2019-11-27 12:04:59
问题 Checking the environment variables and also HTTP configuration options does not reveal something. Is there a way to do this? 回答1: With git 2.8 (March 2016), you can force git fetc h/ push / clone to use IPV4 or IPV6. (for git pull , see below Git 2.16, Q1 2018) See commit c915f11 (03 Feb 2016) by Eric Wong (ele828). (Merged by Junio C Hamano -- gitster -- in commit e84d5e9, 24 Feb 2016) connect & http : support -4 and -6 switches for remote operations Sometimes it is necessary to force IPv4

What is IPV6 for localhost and 0.0.0.0?

由 十年热恋 提交于 2019-11-27 11:38:50
As we all know the IPv4 address for localhost is 127.0.0.1 (loopback address). What is the IPv6 address for localhost and for 0.0.0.0 as I need to block some ad hosts. As we all now that IPv4 address for localhost is 127.0.0.1 (loopback address). Actually, any IPv4 address in 127.0.0.0/8 is a loopback address. In IPv6, the direct analog of the loopback range is ::1/128 . So ::1 is the one and only IPv6 loopback address. And while the hostname localhost will normally resolve to 127.0.0.1 or ::1 , I have seen cases where someone has bound it to an IP address that is not a loopback address. This

Make docker use IPv4 for port binding

由 冷暖自知 提交于 2019-11-27 11:17:22
I have docker host and inside I have one container. The docker host is binding the port on IPv6 interface only, not on IPv4. This is the output tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN - tcp 0 0 0.0.0.0:55082 0.0.0.0:* LISTEN - tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN - tcp6 0 0 :::80 :::* LISTEN - tcp6 0 0 :::22 :::* LISTEN - tcp6 0 0 :::40280 :::* LISTEN - tcp6 0 0 :::5432 :::* LISTEN - tcp6 0 0 :::40122 :::* LISTEN - tcp6 0 0 :::36378 :::* LISTEN - tcp6 0 0 :::40543 :::* LISTEN - tcp6 0 0 :::111 :::* LISTEN - Now I have 40122 port on host to link with port 22 on container. I want to SSH into that

List of possible internal socket statuses from /proc

由 半腔热情 提交于 2019-11-27 11:14:16
问题 I would like to know the possible values of st column in /proc/net/tcp . I think the st column equates to STATE column from netstat(8) or ss(8) . I have managed to identify three codes: sl local_address rem_address st tx_queue rx_queue tr tm->when retrnsmt uid timeout inode 0: 0100007F:08A0 00000000:0000 0A 00000000:00000000 00:00000000 00000000 0 0 7321 1 ffff81002f449980 3000 0 0 2 -1 1: 00000000:006F 00000000:0000 0A 00000000:00000000 00:00000000 00000000 0 0 6656 1 ffff81003a30c080 3000 0

阿里云IPv6 DDoS防御被工信部认定为“网络安全技术应用试点示范项目

由 泪湿孤枕 提交于 2019-11-27 10:57:16
近日，阿里云数据中心骨干网IPv6 DDoS网络安全防御被工业和信息化部认定为“网络安全技术应用试点示范项目”，本次评选由工业和信息部网络安全管理局发起，从实用性、创新性、先进性、可推广性等维度展开，阿里云成为唯一一家入选IPv6 DDoS防护类项目的云服务商。 响应国家号召，率先布局IPv6 2019年，工信部签发《工业和信息化部关于开展2019年IPv6网络就绪专项行动的通知》，从网络基础设置、应用基础设施、终端设施设备，到网站和应用生态，提出了明确的指标化任务，并对网络的服务性能和安全性明确了目标要求。从软件服务商到终端设备制造商，所有业务都要过渡到IPv6，显然，普及IPv6已成为国家战略。 2018年，阿里云就已建成国内首家IPv6 DDoS云防御系统，支持秒级监控防御海量IP，并在护航全球最大在线购物狂欢节双十一过程中进行了大规模实战。期间，IPv4和IPv6双栈防御系统为云上客户和阿里电商业务拦截5000多次DDoS攻击，成功保障双十一的顺利进行，验证了阿里云DDoS高防IP优秀的防御效果、成熟性和稳定性。 阿里云IPv6 DDoS高防IP发展节点 在越来越多的企业过渡到IPv6协议的同时，安全问题也开始凸显。2018年初，IPv6 DDoS攻击已经开始在互联网出现。而很多服务提供者还没有做好将安全防护升级到IPv6的准备。2019年，应对好IPv6浪潮带来的安全挑战
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