port scan ip

Tags: database server securecrt navicat SSH tunnel Port forwardingFor security reasons, the database server is typically deployed only on the intranet, or if it is deployed on a public network, but only for certain designated IPs. But if the data is eventually queried by the public, there will always be a channel to access the database. The following uses Navicat and SECURECRT to achieve database access to two different scenarios.Scenario One: The dat

restart the Apache service/application/apache/bin/apachectl-t/application/apache/bin/apachectl GracefulTo configure a virtual host based on an IP address Configure an IP alias: (The following settings take effect temporarily)Ifconfig eno16777736:0 172.17.0.111/24 up Modify a site profile vim httpd-vhosts.confUse the # number to comment out the previously configured

MasterProgramCode: // Obtain the IP address of the host domain nameProtected void btnshowlocal_click (Object sender, eventargs E){Txtashowanswer. value = "";String strshowany = string. empty; String strhostname = DNS. gethostname (); // obtain the local host nameStrshowanwser = "the local host's name is:" + strhostname + "/N ";Iphostentry iphost = DNS. gethostentry (strhostname); // resolve the host name to an iphostentry instanceForeach (IPaddr

Apache Configuration Managementone, based on the port, that is, based on the different ports, the same IP virtual host virtual hosts with different ports based on the same IP　1) vi/etc/http/conf/httpd.conf2) Change the Listen field toListen 80Listen 8888(the above setting means using 80 and 8888 Ports)　　3) Change the virtual host section To:　　Documentroot/var/www

Test system: CENTOS7 Modify the connection port to modify the configuration file vi /etc/ssh/sshd_config Remove the comment from Port 22 to add a new port configurationport your_port_num Custom port selection recommended on the million-bit ports (e.g., 10000-65535) Do not delete

Port concept: in network technology, a port generally has two meanings: one is a physical port, for example, ADSL modem, Hub, switch, router is used to connect interfaces of other network equipment, such as RJ-45 port, SC port and so on. The second is the logical

For individual users, you can limit all ports because you do not have to provide any service to your machine at all, and for servers that provide network services externally, we need to open the ports that must be used (such as WWW port 80, FTP port 21, mail Service port 25, 110, and so on). The other ports are all closed. Here, for users with Windows 2000 or Wi

Ip time dual-WAN port router is a new product in the domestic market, but it is a promising router. Not only is the appearance good, but the performance is also the best among similar products, the following tests can show its strength. Diagram of ip time dual-WAN port router performance Use the NetIQ network quick det

soft links, easy to manage[Email protected] ~]# mkdir-p/etc/httpd[Email protected] ~]# ln-s/usr/local/httpd/conf//etc/httpd/#优化配置文件路径[Email protected] ~]# ln-s/usr/local/httpd/bin/*/usr/local/bin/#优化命令路径5. Modify the configuration file[Email protected] ~]# vim/etc/httpd/conf/httpd.conf #修改以下参数:ServerName www.bt.com:80 #填写完全主机名Listen 192.168.100.103:80 #监听本地IP 6. Restart Service, test[[Email protected] ~]# service httpd startFour, domain

In the middle of a Cisco switching network, how do I find out which port of the switch is connected to the IP address of a machine? The most convenient and quick way is to use the User tracking function of the CiscoWorks 2000 LMS network management software. The graphical interface is clear at a glance. If you do not have this software, you can use the following manual analysis method to find the answer: Ex

The cause of the error is as follows:Exception in thread "main" Org.hibernate.exception.JDBCConnectionException:Cannot open Connectionat Org.hibernate.exception.SQLStateConverter.convert (sqlstateconverter.java:99) at Org.hibernate.exception.JDBCExceptionHelper.convert (jdbcexceptionhelper.java:66) at Org.hibernate.exception.JDBCExceptionHelper.convert (jdbcexceptionhelper.java:52) at Org.hibernate.jdbc.ConnectionManager.openConnection (connectionmanager.java:449) at Org.hibernate.jdbc.Connectio

capture a variety of protocol packets, and only a logical combination of the protocol can be. The expression is: http or telnet (a combination of multiple protocols plus logical symbols) (3) The packet expression excluding some protocol is: not ARP!tcp Third, filtering for the port (depending on the Protocol) (1) The packet expression that captures one end of the packet is: Tcp.port = = 80 (2) the packets that capture the multiport

, standards, or conventions established for data exchange in a computer network.UDP: For no connection, data insecure, fast. The client and server are not differentiated. TCP: Connection-oriented (three-time handshake), data security, slightly lower speed. Divided into client and server. Three-time handshake: The client initiates a request to the server, the server responds to the request, transmits the data Five, the socket Communication principle diagram Overview of socket Sockets: A combinati

How to view the port number and IP that the program occupiesA software may occupy more than one port to have multiple destination IPs, the following is an example of FQ tool Lantern , which illustrates the port viewing method:1. View with third-party softwareIf you have 360 optimization tools installed on your computer

Doing a good deed today compares the IP layer protocol number and TCP layer port number duplication.The Protocol field of the IP layer indicates the protocol used by the transport layer to determine the decoding program used when the data is decoded from the bottom to the upper layer, the field is a byte, so it can characterize up to 256 protocols, in the officia

Hello everyone, after hard work, COMgrasp.exe v1.0 finally met you. 1. File Readme.doc This file.The execution file of the COMgrasp.exe tool.The comcap. sys Driver file.Ethereal-setup-0.9.6. exe allows you to view and analyze Free Software for ppp, TCP/IP, and... protocols, and open the cap file.Dec 31 14-01-38. cap Sample *. cap, generated by COMgrasp.exe v2.0, IE browser "www.sina.com.cn ". 2. Functions of COMgrasp.exe v1.0 Enable or

kinds of information that must be used for network communication: the protocol that the connection uses, the IP address of the local host, the protocol port of the local process, the IP address of the remote host, and the protocol port of the remote process.When the application layer communicates data through the tran

IP port forwarding in cluster configuration IP port forwarding is the most important step in cluster configuration. You need to flexibly handle it according to your own situation. This section describes the configuration content and configuration process. Configuration content Here, we will simulate accessing the Web S

Environment: SQL Server 2008 R2 + myeclipse 6.5 + JDK 1.6.24 Problem: Java connects SQL Server 2008 through JDBC with the following problem: TCP/IP connections to host 127.0.0.1 via port 1433 failed. Error: "Connect timed out." Verify the connection properties and check that instances of SQL Server are running on the host and that the TCP/IP connection is accep

defines int getpeername (int s, struct sockaddr *name, socklen_t *namelen); Describes the offset address struct sockaddr_in sa that gets the socket; int len = sizeof (SA); if (!getpeername (SOCKFD, struct sockaddr *) sa, len)) {printf ("Other ip:%s", Inet_ntoa (SA.SIN_ADDR)); printf ("Each other port:%d", Ntohs (Sa.sin_port));} Add: GetSockName and getpeername scheduling are important, and if the call is no