This article mainly introduces how to use Python to scan active ip addresses in the Lan (scan online computers). This article provides the implementation code directly. if you need it, refer to the intranet hosts where ip addresses are automatically allocated, sometimes you need to check which ip addresses are in use a
the receive sender sent multicast data.
One, the realization method
1. Agreement Support
Not all protocols support multicast traffic, and for the Win32 platform, only two protocols (IP/ATM) that can be accessed from within Winsock provide support for multicast traffic. Because the usual communication applications are based on the TCP/IP protocol, this paper discusses the multicast communication technolo
Routers to use more and more widely, how to control the Internet through the router, how to set the address of the Mac computer IP filter it?
Many home users are now using similar types of broadband Internet access via telecom ADSL or other companies. Because of the low cost of broadband, and for most of the home users who do not have a large number of data downloads, it is a waste of resources for a famil
Sendarp31 indicates that the other party does not boot, our function does not detect it,1784 the value of the last argument to the function is 0, or your given value does not match the buffer size you gave.If return 31 is not a line, the last parameter pointer points to a value of 0The function has one drawback :This function essentially sends an ARP request packet to the target host and then gets the reply packet to update the MAC, but the send-side IP
are a form of intranet IP
(2) Host-only (VMNET1): This is used and host the same IP, understand, do not explain
(3) Bridge (VMNET0): Bridging mode, this is the need for us, to the virtual machine Mac OS assigned A and host the same IP address, and the host LAN other machine
Copy the following into a batch document that ends in bat and saveConvenient and practical----------------------------------------------------------------------------------------COLOR 0ACls@ECHO OFFTitle Small FAI-hui query LAN online computer IP: Send@ECHO offsetlocal enabledelayedexpansionECHO small FAI LAN viewing toolPing 127.0.0.1>>/nullECHO is getting the
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In the past two days, we see a UDP-based CIDR Block scanner.
Code The following figure shows the Working Group, machine name, user name, and MAC address.
Byte BS [50] = {0 x, 0x10, 0x0 0 x, 0x43, 0x4b, 0 x x 1 };
Handle wait_handle;
M_udpsocket.sendto (void *) BS, 50, destport, m_strip, 0); // send a datagram to the specified IP
:80 # This is written to allow only native accessor change intoListen 0.0.0.0:80This will allow access from all IP
View the next gateway.
Visual 80 port is occupied
If Apache fails to boot, check port, port not occupied, check if installation is correct, WIN10 may require administrator privileges to install Apache.
If this machine is accessible, the LAN is inaccessible and the firewall is checked.
If
I wrote the original code as follows:
function The_lan_ip () {//if (!is_windows_os ()) {//If it is not the Windows operating system, perform ifconfig to catch the corresponding IPV4 IP
EXEC (' ifconfig ', $output);
for ($i = 0; $i error_reporting (0);
Preg_match ('/\inet.*:(. *) \040/', $output [$i], $the _ip_str); Through the regular to find inet corresponding IP add
In the network, LAN, in the management, maintenance of the LAN process, the network administrator will often assume the normal workstation IP address assignment tasks, ordinary workstations only through the correct registration can be considered a legitimate workstation. In the local area network working environment, a
Apache2.4.9 local access OK but on LAN or extranet IP denied access original May 13, 2016 15:30:50 5848 issue: Prepare a test machine server today Apache2.4.9 local access OK but on LAN or extranet IP deny access to LAN browser error such as: View Apache error log informatio
program.
Iv. Conclusion
Through the above description, we can know that the system is divided into server and client, and the server is divided into registration/login server and communication server, the forwarding function of the communication server enables multi-user communication in the LAN. This article uses multi-thread technology and shared data structure technology to implement the forwarding function of communication servers, so that networ
I. Ideas (mainly used in LAN)
It is easy to obtain the Client IP address through the Web. It can be parsed from the datagram (Request object) sent by the client to the web server. However, in actual application, the proxy server must be considered, router forwarding and so on.
The process of obtaining a MAC address is
allocation is based on the topological structure of the network, rather than based on who made the network settings. If an efficient routing scheme is built on the basis of the device manufacturer rather than the topological location of the network, this scheme is not feasible. (2) When there is an additional layer of address addressing, the device is easier to move and maintain. For example, if an Ethernet Card is broken, it can be replaced without
Talking about sharing the Internet, if the number of machines is relatively small, usually with the system from the Internet Connection Sharing, if more machines, it will choose the proxy server mode. In fact, in addition to the use of Windows 2000 with the address translation (NAT) can also easily handle the LAN sharing Internet access, but also allows direct access to the intranet resources from the inter
server is that it can prevent the IP address conflict of computer in LAN, prevent IP conflict and network instability. If we manually assign IP addresses, more computers, many of which may be divided into duplicate IP
From: http://blog.163.com/ldy_3881685/blog/static/32380136200954112940184/Many software have the IP address function of the LAN online computer, but there are many ways to implement it in. net,Below I will introduce several types for your reference.
1. The Microsoft Community introduced the use of Active Directory to traverse LANUse the directoryentry component t
then transmits the packet with M2 to C2. So and so on, until finally found the address of the Host B with the IP address of ip_b Mac_b, eventually transmitted to host B. During transmission, ip_a, ip_b, and mac_a are unchanged, while the MAC address of the intermediate node is constantly changing through ARP (M1,M2,M3
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