cip checklist

sent to the LVS host, at this time, the client request message source IP is CIP, the target IP is LVS VIP2. when the LVS receives the client's request message, the target IP in the request message is modified to the back end of a realserver rip, specifically which realserver rip, depending on the specific algorithm used by LVS3. when Realserver receives the corresponding request message, it will find that the target IP of the message is its own rip,

May translate wrong or understand the wrong place, I marked out in red, you can in the comments to correct and discuss, I will eventually update to the list, thank you. Content Overview Design Class Checklist Application Series Checklist Database Server Checklist Overview This is a checklist for improving the pe

First use PHP to obtain the IP, and then use the PHP Curl function to obtain the user's detailed area. Here's a look at the code; The code is as follows /** This function is to get the client and IP*/function GetIP (){if (!empty ($_server["HTTP_CLIENT_IP"])){$cip = $_server["Http_client_ip"];}else if (!empty ($_server["http_x_forwarded_for"])){$cip = $_server["Http_x_forwarded_

because of some other mechanism, even if it shows 15 minutes, it may not be in a minute.By default, the SYN status time-out is 1 minutes, the timeout for the established state is 15 minutes, the fin state has a timeout of 1 minutes, and the UDP state has a timeout of 5 minutes. When the connection terminates or times out, the scheduler removes the connection from the table Type of LVS: NAT Model : LVS implemented with the Dnat function. 650) this.width=650; "src=" http://s3.

Ip2str (CINPUT_IP) Checkip =true Else Checkip =false End If End If Next End Function '****************************** ' Function ip2str (cIp) ' Created by Qqdao, Qqdao@263.net 2001/11/28 ' Reference moving network IP algorithm ' ' Parameter: CIP IP address ' Return value: value after conversion '****************************** function Ip2str (cIp) Dim STR1,STR2,

(Ctemp_ip, "-") +1) End If If Ip2str (cinput_ip) >=ip2str (CSTART_IP) and Ip2str (CINPUT_IP) Checkip =true Else Checkip =false End If End If Next End Function '****************************** ' Function ip2str (cIp) ' Created by Qqdao, Qqdao@263.net 2001/11/28 ' Reference moving network IP algorithm ' ' Parameter: CIP IP address ' Return value: value after conversion '****************************** func

Client/Server IP03 .*04. * @ author Yaron (http://yaron.org.cn)05. * @ version 0.106. * @ package07 .*/08.09. class getIP {10. function clientIP (){11. $ cIP = getenv ('remote _ ADDR ');12. $ cIP1 = getenv ('HTTP _ X_FORWARDED_FOR ');13. $ cIP2 = getenv ('HTTP _ CLIENT_IP ');14. $ cIP1? $ CIP = $ cIP1: null;15. $ cIP2? $ CIP = $ cIP2: null;16. return $

Load balancer function ipvs, the layer-7 Content Delivery load tool ktcpvs (kernel tcp virtual server) is not very well-developed and used by many people. Ipvs is a framework integrated in the kernel.ipvsadmYou can define rules to manage ipvs in the kernel. Just like the relationship between iptables and netfilter. 2. How LVS-ipvs works The first thing to explain is several IP addresses related to LVS: VIP: Virtual IP, IP address of the NIC that receives Internet packets on the LVS server. D

code. Compromise between encapsulating code and maintaining a single point of control for each feature element. The static type language restricts the expression of the language, thus reducing the effect of preventing rogue tiles. A common type can compensate for this flaw in the Java language to some extent. All captured or declared detected exceptions must be thrown, which means that some code in the method cannot be extracted. Aspect-oriented programming techniques--by adding

. $ _ SERVER ['Local _ ADDR '] and $ HTTP_SERVER_VARS ['Local _ ADDR']. no results were obtained during the test (PHP5 test environment ).Obtain the complete IP class[Code = Php width = 600px] 01 ./**02. * Get Client/Server IP03 .*04. * @ author Yaron (http://yaron.org.cn)05. * @ version 0.106. * @ package07 .*/08.09. class getIP {10. function clientIP (){11. $ cIP = getenv ('remote _ ADDR ');12. $ cIP1 = getenv ('http _ X_FORWARDED_FOR ');13. $ cIP2

stack in the kernel. As you can imagine, this needs to be done in the kernel module, and such filtering and forwarding rules are defined by the Administrator, therefore, LVS is a two-stage architecture design. In the kernel space, "ipvs" is used, while in the user space, "ipvsadm" is used to define cluster service rules ". This makes it easy to think of iptables. Three forwarding modes of LVS: LVS-NAT: Network Address Translation LVS-DR: Direct routing LVS-TUN: IP tunneling VIP: IP address used

nodes, that is, as the client Access portal, is also the client's access to the node to respond to the exit, the network address as the entire cluster VIP address, the intranet address and the backend server real Server on the same physical network, Real server must use a private IP address.Packet Flow Analysis The user sends the request to the Director Server, the requested data message (the source IP is CIP, the destination IP is the VIP)

(idc_edit2, cscancel); // modify the control property getdlgitem (idc_button1)-> enablewindow (false); getdlgitem (idc_button2)-> enablewindow (false ); getdlgitem (idc_button4)-> enablewindow (false); getdlgitem (idc_button3)-> enablewindow (true);} // establish a connection void handle: onbnclickedbutton3 () {// todo: add the control notification handler code cstring cscontent here; // the content in the input box, that is, the IP address (cstring type) Char

Determine Access IP function GetIP () { if (! empty ($_server ["http_client_ip"])) { $CIP = $_server ["Http_client_ip"]; } else if (! empty ($_server ["http_x_forwarded_for"])) { $CIP = $_server ["Http_x_forwarded_for"]; } else if (! empty ($_server ["REMOTE_ADDR"])) { $CIP = $_server ["REMOTE_ADDR"]; }

Php obtains the code of the region based on the ip address. Use php to obtain the ip address of the local machine, and use the php curl function to obtain the detailed region of the user. next let's take a look at the code. the code is as follows ** This function is used to get the client and IP * functionGetIP () first use php to get the ip address of the local machine, and then use the php curl function to get the detailed region of the user. let's take a look at the code below; T

Php determines the access IP address Determine the access IP address Php code Function getIP (){ If (! Empty ($ _ SERVER ["HTTP_CLIENT_IP"]) { $ Cip = $ _ SERVER ["HTTP_CLIENT_IP"]; } Else if (! Empty ($ _ SERVER ["HTTP_X_FORWARDED_FOR"]) { $ Cip = $ _ SERVER ["HTTP_X_FORWARDED_FOR"]; } Else if (! Empty ($ _ SERVER ["REMOTE_ADDR"]) { $

How PHP judges access to IP This article mainly introduces PHP to determine the method of access to IP, involving PHP for server-side predefined variable $_server related judgment and use of skills, the need for friends can refer to the following The example in this paper describes how PHP judges access to IP. Share to everyone for your reference. Specific as follows: ? 1234567891011121314151617 function getIP() { if (! empty ( $_SERVER ["HTTP_CLIENT_IP"] )) { $

1 #!/usr/bin/env python2 #-*-CODING:GBK-*-3 #-*-coding:utf_8-*-4 #date:2015 Year September 115 #Author: Blue Line6 #Blog http://www.cnblogs.com/duanv/7 8 ImportRequests9 ImportThreadingTen ImportLevenshtein One ImportRe A - defScan (original_r,cip,ip_begin,original_match,header): -ip=cip+Str (ip_begin) the Try: -R=requests.get ('/ http'+ip,headers=header,timeout=1) - exceptException: - Pass

One, the LVS load balanced NAT working mode (work on the network layer) 650) this.width=650; "Src=" https://s4.51cto.com/oss/201711/05/ 7233965d67479310bf3811804d0715af.png "title=" 1.png "alt=" 7233965d67479310bf3811804d0715af.png "/> Work flow (a). When a user requests to reach the director Server, the requested data message is first to the prerouting chain of the kernel space. At this time the source IP of the message is CIP, the target IP is