PHP Curl Forged IP Address and header information code example, Curlheader
Although Curl is powerful, but can only forge $_server["Http_x_forwarded_for", for most IP address detection procedures, $_server["REMOTE_ADDR"] is difficult to forge:
The first is the client.php code.
Copy the Code code as follows:$headers [' client-ip '] = ' 202.103.229.40 ';$headers [' x-forwarded-for '] = ' 202.103.229.40 ';$HEADERARR = Array ();foreach ($headers as $n = = $v) {$HEADERARR [] = $n. ': '. $v;}Ob_start
();
Ob_clean ();
Echo $out;
And then the server.php.
The code is as follows:
function GetIP () {
if (!emptyempty ($_server["Http_client_ip"))
$cip = $_server["Http_client_ip"];
else if (!emptyempty ($_server["http_x_forwarded_for"]))
$cip = $_server["Http_x_forwarded_for"];
else if (!emptyempty ($_server["REMOTE_ADDR"]))
$cip = $_server["REMOTE_ADDR"];
Else
$
First word: masquerade indicates the meaning of makeup disguise... NatTest Machine: VM1 VM2 vm3 three virtual machine VM1 has a dual Nic, a connection to the Internet a host-only connection to the Intranet, the network structure of the LVS--NAT environment is deployed
Both VM2 and vm3 are in the host-only network.
Lab physical structure:
Lab diagram and address Distribution Description: the IP address of clinet is CIP. In this experiment, the VIP addr
request
Dip:ds and RS communicate with each other
RIP: Back-end server IP
Cip:client IP Client IP
CIP
How the Lvs-nat type works:
When a user requests to reach the director Server, the requested data message is first reached to the prerouting chain in the kernel space. At this point the source of the message IP for the CIP, the target IP for VIP prerouting check found that the target IP packet is local,
destination IP of the request message
1. Lvs-nat mode
Working principle:主要是数据到达VS后,VS根据VSIP和调度算法,去服务地址池中去查找哪些节点提供此服务,然后将数据包的Dip改为RSip,可能还会改变Dport。然后RS上的网关需指向DIP。VS最终对用户做响应Application Scenarios:1、此模式对RS修改较少,
2. LVS-DR mode
Working principle:主要是数据回去不经过VS,CIP数据到网关,然后网关去找VIP地址,数据到达VIP之后,VIP根据调度算法,转发给响应的RIP,此时目标MAC构建为RIP的MAC地址,此时数据转发出去,不经过TCP/IP的ip层检查。不会经过网关,通过交换机时查看mac表,然后转发给RIP,因此VS和RS必须在同一个交换机下,但是不用在同一个ip网络中,然后RIP收到ip地址,查看mac是自己的
1. Add Sample Grabber Filter
When we add sample grabber filter, we can call its interface (interface) Isamplegrabber directly. This interface can obtain a separate media Samples that pass through the filter. For more information, see DXSDK. 1.1 Derivation of their own sample grabber
Derive your own class from the ISAMPLEGRABBERCB, and then implement its virtual functions, see the sample programs in the SDK (DXSDK root/samples/c++/directshow/editing/grabbitmaps) for details. 1.2 Direct call to s
LVS Nat Model Creation
I. Nat model topology of LVS
When a client requests a message, director is used to change the target IP address for forwarding. (When directed ctor, the target IP address is changed from VIP to rip, but when the request message is sent from Director, it is still sent from the interface of the NIC where the dip is located .)
Packet Flow Direction: 1-> 2-> 3
The source address of 1 is CIP, and the target address is ctor's VIP.
The
released to the user space. 4. If the destination address and port inside the packet are within the rule, then this data message will be modified to the destination address as a pre-defined backend server and sent to the postrouting chain. 5. Finally, the backend server is sent through the postrouting chain.Three. Package forwarding model for LVS1.NAT Models:650) this.width=650; "src=" Http://s4.51cto.com/wyfs02/M01/83/6A/wKioL1dzI7jzvOgZAABXr1zmtqQ618.jpg "title=" 002. JPG "alt=" wkiol1dzi7jzv
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Dr ModelFirst, the benefit of the DR Model relative to the NAT model is that the Director receives the request only and forwards it to the Real server, wi
(server);(2) data sharing;shared storage;Nas:network attached Storage (file level);San:storage Area Network (Block level);Ds:distributed Storage;Data synchronization:Rsync...Type of LVS:Lvs-natLVS-DR (Direct routing)Lvs-tun (IP tunneling)Lvs-fullnat (simultaneous change of the source IP and destination IP of the request message)Note: The first three types are standard; Fullnat is the type that is added later, the kernel may not support it by default;Lvs-nat:Multi-Objective Dnat: By modifying th
section: cold-formed thin-walled steel 2c160x70x20x3.0 back-cross section
Limb back Pitch (mm): 0
Out-of-plane calculation length: 3.000
Strength Calculation net cross-sectional factor: 1.000
Seismic design: No seismic design
Design internal force:
Design values for the x-axis bending moment Mx (KN.M): 5.400
Design value of bending moment around y-axis My (KN.M): 0.000
Shear Design Value V (KN): 8.2800
Component checking:
1. Calculation of section characteristics
Full cross-sectional character
Scala classes are similar to Java classes. A simple example is as follows:
class MyClass { var myField : Int = 0; def this(value : Int) = { this(); this.myField = value; } def getMyField() : Int = { return this.myField; } def addToMyField(value : Int) { this.myField += value; }}
If you are curious, you can decompile the compiled code into Java code:
import scala.reflect.ScalaSignature;@ScalaSignature(bytes="\006\00112A!\001\002\001\013\t9Q*_\"mC
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