In the previous article, I mainly talked about the IP address test site in the knowledge point. I plan to talk about the test site for the packets captured during DHCP IP address acquisition. If you have any errors, please correct them.
DHCP is the application layer protocol, UDP is the transport layer protocol,
When the client obtains an IP address through DHCP, it sets the DHCP server: the server name is win2k3, the IP address is 192.168.1.1, and the client host name is winxp2; Scope: 192.168.1.1 mdash; 192.168.1.10. Part 1: 1. the cli
1. if the proxy server is not used: REMOTE_ADDR your IPHTTP_VIA has no value or does not show HTTP_X_FORWARDED_FOR no value or does not show 2...
I. no proxy server is used:
REMOTE_ADDR = your IP address
HTTP_VIA = no value or no Display
HTTP_X_FORWARDED_FOR = no value or no Display
II. Transparent Proxy
Filter List Selection page, select the previously created IP filter name "Filter fundtest Server IP", and then click "Next (N) >" (Figure 26)
Figure 26
7. Select the "Deny" filter that you created prior to the filter action page, and then click Next (N) > until complete (Figure 27, 28)
Figure 27
Figure 28
8, finally in the
4. Proxy server allocation Although the NAT address translation method is good, it also has its own shortcomings. Simply put, you can only perform IP address translation simply, but cannot implement file caching. This reduces Internet access traffic and prevents fast Internet access. The proxy
Nginx reverse proxy, the IP obtained in the application is the IP of the reverse proxy server, the domain name is also the reverse proxy configuration URL of the domain name, to solve the problem, you need to add some configuration information in Nginx reverse proxy configuration, the purpose of the client's real IP an
4. Proxy server allocation
Although the NAT address translation method is good, it also has its own shortcomings. Simply put, you can only perform IP address translation simply, but cannot implement file caching. This reduces Internet access traffic and prevents fast Internet access.
The proxy
The client sets the DHCP server through DHCP: the server name is win2k3, the IP address is 192.168.1.1, the client host name is winxp2, and Scope: 192.168.1.1-192.168.1.10. Part 1: 1. the client sends a DHCP Discover packet. The client sends a DHCP Discover packet using UDP port 68 broadcast, and specifies that the hos
', 'email title','-1'); "AU3 mail sending test"; mail titleDo$ Getip = _ GetIP (); Internet IP AddressSleep (300)TrayTip ("prompt", 'Getting Internet IP address', 5, 1)Until $ Getip
If $ testIp = $ Getip ThenTrayTip ("prompt", the 'Internet IP address is the same as the on
This article mainly introduces the analysis and implementation code for PHP to obtain the real IP address of the client. it focuses on several cases of interference in obtaining the real IP address, for more information, see $ _ SERVER ["REMOTE_ADDR"].
(1) if the client is a
) address or vice versa.NetshThe command does not need to restart the computer to complete this task. For a portable computer that is moved from one environment to another, when it must use a static IP address in one location, and the IP address allocated by DHCP must be use
"bundle address" to select the IP of the machine that you want to run the server for MU and then enter "IP of intenet network device" on "output address" and then OK. This inside of the other, what "IP Security", "HTTP" and so do
:%mask%
Echo. Default gateway:%gateway%
Echo. ————————————————————
Echo.
echo. If the above parameters are correct, press Y to continue, error please press N to return to reset!
Echo.
set/p choice= Your choice:
If "%choice%" = = "N" goto IP1
If "%choice%" = = "n" Goto ip1
If "%choice%" = = "Y" goto ipaddr
If "%choice%" = = "y" goto ipaddr goto Ip_judge
Echo.
: ipaddr
cmd/c netsh interface ip set addre
network connection method of the Wide Area Network leased line of the telecommunications company, as long as the broadband access method can be connected to the Internet. Therefore, it is technically feasible and cost-effective to connect to the Internet through broadband access.
From the above analysis, we can draw a conclusion that using Internet + VPN to achieve long-distance Interconnection between enterprises is the best solution for enterprise networking. However, we must adopt appropriat
$ _ SERVER [ quot; REMOTE_ADDR quot;] is often used to obtain the client IP address in PHP. However, if the client uses a proxy SERVER to access the client IP address in PHP, $ _ SERVER
" address conflict
There are many causes of IP address conflicts. One of the most important reasons is that the physical address of the NIC on the local computer is the same as that on other computers, as a result, the local computer cannot connect to the wireless network. To resolve this
In-depth analysis of several PHP client IP addresses. In this article, we will introduce in detail how to use $ _ SERVER [REMOTE_ADDR] to obtain the client IP address in PHP. However, if the client uses a proxy server for access, we will provide a detailed description of the
Server. ScriptTimeout = he10' H3CResponse. Buffer = ("S. F." = "S. F .")Dim IpSearch'Create an objectSet IpSearch = New clsIpSearch'Use the default connection to establish a connection to the SQL Server IP address library, but ensure that wry. mdb exists.IpSearch. ConnectionString = "DRIVER = {SQL
20120917@ Zheng yu Summary
The common Java/PHP server obtains the Client IP address as follows:
PseudoCode:
1) IP = request. getheader ("X-FORWARDED-FOR")
Forge. See Appendix.
2) If the value is null or the array length is 0 or equal"Unknown", Then:
IP = reques
In the Linux environment, the strong-reverse proxy of Nginx is used. As a result, the IP obtained by request. getRemoteAddr () is the IP address of the proxy server of the company, and the log records are seriously inaccurate!We all know that the method for obtaining the Client IP
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