IP router technology is still quite common, So I studied the Key Technology Analysis of IP router technology and IP Phone. Here I will share it with you and hope it will be useful to you. IP phones are the economic advantage of combining voice data integration with the technical progress of voice/grouped
I. TCP/IP background and introductionIn the 70 's, with the development of computer technology, computers users realized that it was necessary to connect computers from all over the world to play a more important role in computer. But the simple connection is not enough, because the computer can not communicate. Therefore, the design of a common "language" to communicate is necessary to be less, then the TCP/IP
IfconfigRouteIpIP routeOne, ifconfig command (view or configure IP)1. View Network Connections# ifconfig \ Show all active connections, not packet-disabled devicesOr# IFCONFIG-A \ Show all active and inactive connectionsDisplays the connection for the specified interface# ifconfig Eth12. Configure IP Address# ifconfig eth1 192.168.0.1 netmask 255.255.255.Or# ifconfig eth1 192.168.0.1/243. Enable or disable
Original: Java script development to obtain IP-specific geo-location information based on customer IPSource code: Http://www.zuidaima.com/share/1550463468522496.htmGet IP addresses based on client IPOperation Result:Package Com.zuidaima.founder.util.ip;import Java.net.inetaddress;import java.net.unknownhostexception;/** * Function Description: Test * @author www.zuidaima.com */public class iptest{public sta
Firefox and Chrome support WEBRTC can request the stun server to return to the intranet IP, unlike the XMLHttpRequest request, stun request is not seen in the developer tool.
Get the IP addresses associated with a account function Getips (callback) {var ip_dups = {}; Compatibility for Firefox and chrome var rtcpeerconnection = window. rtcpeerconnection | | window.mozrtcpeerconnection | |
Window.webk
Iptables Shielded IP
The code is as follows
Copy Code
Iptables-i input-s 202.77.176.106-j DROP
An entire paragraph, the order from 192.0.0.1 to 192.255.255.254.
The code is as follows
Copy Code
Iptables-i input-s 192.0.0.0/8-j DROP
Prohibit IP paragraph when to see the amount of clearance, do not bar their own
Dim Ip,ipstring,visitip' The IP address to be bannedIpstring= "|195.225.177.34|195.225.177.137|72.232.250.10|"' Get IP AddressIP = Request.ServerVariables ("Http_x_forwarded_for")If IP = "" ThenIP = Request.ServerVariables ("REMOTE_ADDR")End IfVisitip= "|" IP "|"If InStr (1,
TCP/IP stack attacksTwo of the following types:
Scanning: scanning or tracking footprints are part of the hacker's initial information collection process. Before hackers can attack a system, they need to collect information about the system, such as network layout, operating system type, available system services, and system users. Hackers can deduce possible vulnerabilities Based on the collected information and select the best attack method for the
Share the PHP implementation of the IP access restrictions of two pieces of code, divided into a limited number of single IP access and restrict access to the IP segment of the two code, the need for a friend reference.
Add IP Access Restrictions
if (getenv (' http_client_ip ') strcasecmp
Acquiring a place of attribution via IP
Get IP Address
$ip = $_server[' remote_addr '); Automatically get the IP of the client
IP-Corresponding region
if (!empty ($_post[' IP ')) {
$i
Common linux practicesIptables reference rules The code is as follows:Copy code Iptables-I INPUT-p tcp-dport 80-m-mac-soruce $ MAC-j DROPIptables-I INPUT-p tcp-dport 80-s $ IP-j DROP IP address-based Method 1,First, create the following configuration file and place it under the nginx conf directory, and name it blocksip. conf:Add the following code: The code is as follows:Copy code # Shielding soso
I. Configuring a static IP for a wireless networkEdit the/etc/network/interfaces file as follows:192.168. 1.120 255.255. 255.0 192.168. 1.1 # (depending on the situation) DNS 8.8. 8.8 8.8.4.4 # (fill in the details)4. Restart the Network Service command as follows:#/etc/init.d/networking restart5. Set up extranet access DNS editing/etc/resolv.conf as follows:8.8. 8.8 8.8. 4.4This configuration disappears after each restart of the computer, so see t
IP Address | Convert
IP address to Long integer converts a string IP address ("192.168.0.1") to a Long number (3232235521). One of the reasons to does this would is to store IP addresses in databases. Numbers greatly reduce the size required to store this information.
inputs:asnewip-string
In the campus network, the most convenient way to make trouble is to steal someone else's IP address, the computer that is embezzled IP address not only can not use the campus network normally, but also will frequently appear the IP address is occupied the prompt dialog box, to the campus network security and the user application brings the extremely hidden dange
Shenzhou Digital switch uses MAC-IP access control list function to realize the binding of multiple Mac-ip under single port
1. Description:
A company office network, the core switch for the digital Shenzhou dcrs-5950-28t, according to the office floor division of several VLANs, for each floor divided into different IP segment and set the gateway. Interface Eth
Build DHCP service on Linux system server, realize two basic functions: 1, automatically assign IP address, 2, specify IP address manually.First prepare two virtual machines as the experimental object, a Linux system as a server, a windows7 system as a client, both using the same virtual NIC Vmnet1, and using only host mode.Determine if the disc status on the server is connected,Use commands to view and Mou
IP datagram Header highest bit on the left, recorded as 0 bit, the lowest bit on the right, recorded as a bitVersion:4 bits, refers to the IP protocol version of the current IP protocol version number is 4 (that is, IPV4)Header Length:4 bits, the maximum value that can be represented is 15 units (4 bytes in one unit) so the maximum of the first ministerial degree
Today, the maintenance staff to find me said, recently to push Win7, temporary desktop cloud did not promote, or the use of manual installation of Win7 way. So, need me to help write a script, probably function is to ghost Win7 before the first export XP IP information, after ghost completion, automatically read this IP information to restore IP settings.Ghost ba
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