port replicator

When Linux opens the firewall, you will find that it is no problem to log on to port 23 from the local computer, but if you log on to the Linux system from another PC, you will notice that the error is prompted:Unable to open connection to host on port 23: Connection FailedBecause the Linux firewall by default is 23 port, if Allow remote login, you can turn off t

Port Multiplexing is the focus, as long as the use of stm32 is used to peripherals, peripherals are shared with the Gpio pin (multiplexing), that is, some pins can be purely as input and output, but also as a certain function of peripheral (such as ADC, serial port and so on) pin port.This is an advantage of stm32, which saves the number of pins.Port multiplexing and remap pin correspondence can be queried

Windows is the host machine, and Linux is installed in the vmwarevm. You can also write a program in Linux to send messages to the serial port. The same principle is to use the virtual serial port software vspm to connect com3 to com4 and then capture it through the serial port debugger. The following is a C sample code for the serial program in Linux. The use a

How to disable port 445 and port 445 Some ports in the system are usually unavailable but dangerous, such as ports 139, 135, and 445. windows is open by default. In this case, you can manually close these ports! Next we will introduce a windows Group Policy to disable all the dangerous ports to be disabled at one time.Method/step 1Select "run" from the "Start" menu, enter "gpedit. msc", and press enter to

Currently, the serial port 0 of Wince is used for debugging the serial port. However, because my case requires three serial ports, I need to change it to a common serial port, but I still need to print the debug information when I start the system, in view of this, I modified the following: Debug. add a line in C: int debugconsoleenabled = 1; make a judgment when

This article is original from Xiao Li's column and needs to be reproduced with the source: [http://blog.csdn.net/softwave/article/details/8907599] Recently, I am working on a project that requires the use of Java to read the small data of the pound tower. This requires the use of Java to communicate with the serial port. Serial Port Java code has been developed, but it cannot always debug programs at the p

Creation Time: Article attributes: original Article submitted: flashsky (flashsky1_at_sina.com) Author: flashskyEmail: flashsky@xfocus.orgSite: www.xfocus.net www.shopsky.comReprinted, please indicate the original author's security focus In the programming of socket server applications in windows, the following statements may be compared:S = socket (af_inet, sock_stream, ipproto_tcp );Saddr. sin_family = af_inet;Saddr. sin_addr.s_addr = htonl (inaddr_any );BIND (S, (sockaddr *) saddr, sizeof (

Lt ;? Php port sniffer-you can specify the website and port and return the sniffing result functionhttp_request ($ server, $ port) {$ data quot; $ query quot; HEADHTTP1.0 quot; $ fpfsockopen ($ serve // Php port sniffer-you can specify the website and port // Returns th

Centos command to view port usage, for example, to view port 80 usage use the following command: lsof-itcp: 80 to list all port netstat-ntlp1, open port (take Port 80 as an example) Method 1: Centos command to view port usage, fo

Php implements TCP port detection, and php implements tcp port. Php implements TCP port Detection. php implements tcp port. This article describes how php implements TCP port detection. Share it with you for your reference. The procedure is as follows: This program can confi

How to see if a port is being consumedEnter "Netstat-an" in the command prompt to display all open ports on this machine. The following table is a specific description. Data columns Description Propo Refers to the protocol name used by the connection Local address is the local computer IP address and the port number that the connection is using

Port ing/port forwarding in CentOS = [Implementation goal] ============================== [Server A] has two NICs, one connected to the Intranet and one connected to the Internet. [server B] only has one Intranet Nic; Access Port 7890 of [server A] and jump to port 80 of [server B. = [Hardware device] =================

Apache modifies the port number to modify the root directory to build multiple websites, Apache port number Modify Apache Port numberSelect Httpd.conf under Apache, look for: Listen, you will see#Listen 12.34.56.78:80Listen 80Change 80 to 90, save it. Modify the default port for Wampserver http://blog.csdn.net/zaocha3

　　Described in the previous article, You can add a record in the local hosts file to resolve the local 127.0.0.1 of the trusted domain name in the public number, but Tomcat does not start on the non-root 80 port of the Mac, so we can use Pfctl port forwarding to forward the request on the local 80 port to port 8080, fo

Python port scanning simple program, python port scanning This example shares the Python Port Scan implementation code for your reference. The details are as follows: Obtain the IP address and port number of the local machine: import socket def get_my_ip(): try: csock = socket.socket(socket.AF_INET, socket.SOCK_

First of all, standing on the shoulders of giants, the first half is the previous article. I am lucky to be guided by this article, set successfully, and pass the test. The second part is the configuration of the serial port tool. Original address: First of all, standing on the shoulders of giants, the first half is the previous article. I am lucky to be guided by this article, set successfully, and pass the test. The second part is the configuration

Obtain the COM port number mapped to the serial port Background: Recently, due to project requirements, you need to operate the SMS cat. After the SMS cat is inserted into the computer, it will map the COM port based on the current PC status. Here, you need to dynamically obtain the COM port mapped by the SMS cat. Prog

Normal database connection string configuration, which is the case where the MSSQL server port is 1433 (default).But sometimes, for the database server to be secure, the port is changed to something else, and then connecting to the database may report the following error:An error occurred while establishing a connection to the server. When you connect to SQL Server 2005, this failure may be caused by SQL Se

Database port number and other configuration (transfer), Database port number Configuration I. Oracle Driver: oracle. jdbc. OracleDriver URL: jdbc: oracle: thin: @ Port_number: port number. The default value is 1521. Ii. SQL Server Driver: com. microsoft. jdbc. sqlserver. SQLServerDriver URL: jdbc: microsoft: sqlserver: // Port_number:

1. Windows platformExecute under Windows command-line window:1. View all port usagec:\>Netstat-anoProtocol local address external address state PIDTCP 127.0.0.1:1434 0.0.0.0:0 LISTENING 3236TCP 127.0.0.1:5679 0.0.0.0:0 LISTENING 4168TCP 127.0.0.1:7438 0.0.0.0:0 LISTENING 4168TCP 127.0.0.1:8015 0.0.0.0:0 LISTENING 1456TCP 192.168.3.230:139 0.0.0.0:0 LISTENING 4TCP 192.168.3.230:1957 220.181.31.225:443 established 3068TCP 192.168.3.230:2020 183.62.96.18