linux port scan tool

=socket.socket (socket.af_inet, socket. Sock_stream) result=s.connect_ex ((IP, port)) if Result==0:17 Lock.acquire () 18 Print Ip,u ': ', Port,u ' Port occupied ' lock.release () except:21 print U ' port scan exception ', ' Def Ip_scan (IP): 24 "" "25 input IP,

Windows clients can use Telnet if they connect to a remote Linux server through a CMD window;The CentOS system default Telnet 23 port is off.Server local use nmap IP address-p to view the Telnet status is off;[[email protected] ~]# Nmap 192.168.20.3-p 23Starting Nmap 5.51 (http://nmap.org) at 2016-03-11 09:04 CSTNmap Scan Report for 192.168.20.3Host is up (0.0001

used to manually set the network rate. Generally, a gigabit Nic supports 10 | 100 | 1000. The unit is Mbps. Usage:Ethtool-s eth0 speed 1000 duplex full autoneg off Effect:Set the physical port corresponding to the device number eth0 to 1000 Mbps, full duplex mode, and disable automatic negotiation. 2. miI-Tool MII-tool (this command specifical

established.From the above explanation, we can see that the main difference between the two modes is the data connection is established differently, for the port mode, is the client C on the local open a port and other server s to connect to establish a data connection, and the PASV mode is the server s open a port waiting for client C to establish a data connec

and is managed by ICANN;(2) The client only needs to make sure that the port number is unique on this machine. The client-side slogan is short-lived and is called a temporary port number because of the existence time;(3) Most TCP/IP implementations give a port number between 1024-5000 for the temporary port number. Th

The so-called Port security refers to the software program that can open port , not the port itself. Services and port corresponding to the document /etc/services, commonly used to observe the port of the program has netstat and the Nmap . Netstat: Monitor your

] view plain copy Netstat-alt Find the process of a specific port: [Html] view plain copy Netstat-phosphatase | grep 8010 View the user name or user id: [Html] view plain copy Netstat-altep Lists the user IDs of tcp in the current process. [Html] view plain copy Netstat-altne Here, if you use the-n and-e options together, the attribute of the User column is the User ID, not the User name. You can use the-ep option to view both the process name and use

The management tool of Linux network performance Three Musketeers This article is an introduction to managing Linux viewing ports, which displays the outgoing headers from each packet and the address from host hostname to port 80.NETSTAT-TLN command is Linux view

In Linux generally use Netstat to view system port usage steps. The netstat command is a very useful tool for monitoring the TCP/IP network, which shows the routing table, the actual network connection, and each network interface device's The function of the netstat command is to display network connections, routing tables, and network interface information, al

then provide the IP address to Nmap. The above commands are used for GNU Nux--other systems have different commands for zone transfers. Other options: -P A single port and a range of ports, such as 1-1023, can be represented by hyphens. When both the TCP port and the UDP port are scanned, you can specify the protocol by adding T: or U: before the

in Machine A or machine B. Task 1: forward port forwarding now starts our first task: assume that the database service is installed on host D, and the listening port is 8888, what if I want to directly access the database in host D through host A in the Office domain? This requires the SSH forward port function. In Linux