It can be said that if your network has a loophole, or your firewall has holes, or your server is open port, then your network is vulnerable to attack, the risk of damage.
The first strike is strong. To prevent others from destroying their own network, first to their own "ruthless" point. We can use the method that the hacker uses to test our system first.
工欲善其
= 262 (Good luck !) Ip id sequence generation: randomizedservice info: OS: linuxtraceroute (using port 113/tcp) Hop RTT address1 242.00 MS nrt04s01-in-f99.1e100.net (66.249.89.99) read data files from: C: \ Program Files \ nmapos and service detection completed MED. please report any incorrect results at http://nmap.org/submit. NMAP done: 1 IP address (1 host up) scanned in 102.19 seconds raw packets sent: 2094 (95.652kb) | rcvd: 45 (2214b)
Wow, only
[Original] Introduction to NMAP network port scanning tools
I NMAP Introduction
NMAP is a port scanning tool for large networks, although it is also suitable for single-host scanning. In different situations, you may need to hide, scan across the firewall, or use differe
graphical interface tool to Nmap.1, from the official website of nmap download Namp installation program.Official website https://nmap.org/download.html2, Installation Namp programDouble-click the installer to perform the installation, all by default. Installing Namp under the Windows platform requires the installation of a packet capture library WINPACP, which helps its callers, such as
Url:Nmap is a scanning tool that all security enthusiasts should be familiar with, and this article describes its use when scanning large cyberspace.Why scan Large cyberspace? This is the case:
Intranet infiltration Attackers single point of breakthrough, into the intranet, the need to further expand the results, you can first scan the entire private network
NMAP is an open-source free network discovery and security auditing tool. The software name NMAP is short for network mapper. NMAP was initially created by Fyodor in 1997. Later, with the participation of many volunteers in the open-source community, this tool gradually beca
/wKioL1ZqiuDDCswoAAFwLGrmYSQ165.png "style=" float: none; "title=" 99999999992.png "alt=" Wkiol1zqiuddcswoaafwlgrmysq165.png "/>3.6 Dictionary File settings: mainly for the scanning process need to use the dictionary to select, you can manually add data dictionary,650) this.width=650; "src=" Http://s4.51cto.com/wyfs02/M00/77/A6/wKiom1Zqiuahr8lqAAE2XBSZWGA569.png "style=" float: none; "title=" 99999999993.png "alt=" Wkiom1zqiuahr8lqaae2xbszwga569.png "/>Four, the
Probe into the scapy of network scan big kill device in Python
Recently experienced twisted blow, this network programming really do not understand, can not touch its internal logic, it seems that network programming is not so good to get. Fortunately, see the scapy, this
Linux has a lot of powerful network scanning tools, network scanning tools can be divided into: host scanning, host service scanning, route scanning and so on.Fping is a host scan tool that can scan hosts in batches compared to the Ping tool.Fping Official website: http://fping.org/Fping source code compilation and ins
Netcat, also known as the Swiss Army Knife, is a common network tool for hackers and system administrators, originally developed for file transfer and later developed many powerful features, such as the ability to perform bulk host service scans.Previously, another more common scanning tool for bulk host services was introduced: Nmap.The installation of the Netcat is also very simple, with the direct Yum installation:Yum Install NCIn general, it is no
In addition to the previous article "Linux Common Network Tools: Route scanning traceroute" introduced in the Traceroute, General Linux also built-in another common route scanning Tool mtr.The MTR is better used in some ways than traceroute, and it can display the information of each hop routing in real time and constantly probe.Traceroute uses UDP packet probing by default, and the MTR uses ICMP packet detection by default, and ICMP has a lower prior
) Hwlen:fieldlenfield = (None) ple N:fieldlenfield = (none) Op:shortenumfield = (1) Hwsrc:multipletypefield = (none) Psrc:multipletypefield = (none) hwdst:multipletypef Ield = (none) Pdst:multipletypefield = (none) #hwtype the type of hardware address, hardware address not only Ethernet, is the Ethernet type when this value is 1#ptype identify what protocol is used for the previous layer #op is the action Type field, A value of 1 indicates an ARP request, a value of 2, an ARP reply, a value of 3
A gadget that uses Python to scan a fixed port to receive parameters: Start IP, terminate IP, target port. and test success, so in this record, Daniel do not spray.
#coding =utf-8 Import Socket import time import sys def portscanner (ip,port): Server = (ip,port) SOCKFD = Socket.s Ocket (Socket.af_inet,socket. SOCK_STREAM) Sockfd.settimeout (0.1) ret = SOCKFD.CONNECT_EX (server) #返回0则成功 if not ret:sockfd.close ( ) print '%s:%s is opened ... '% (ip
This example takes the class C address as an example, if it is a Class A or class B address, the script can be modified slightlyIpaddr= '/usr/sbin/ipa|grep$1|grepinet|awk ' {print $2} ' netmask= ' echo${ipaddr}|awk-f '/' ' {print$2} ' if[ $netmask -eq24];thensubnets= ' echo${ipaddr}| awk-f "." ' {print$1 '. " $ "." $ "."} ' ' acount=0foriin ' seq125 ' do/usr/bin/ping${subnets}${i}-c 2>/dev/nullif[$?-eq 0];thenecho "${ subnets} $i isonline "let count+=1elseecho "${subnets} $i isnotonline" fi
Do not need any tools, DOS command scan all the ports of a network segment!
Open a DOS window under Win2000, and then execute
FOR/L%a in (1,1,254) do start/min/low telnet 192.168.0.%a 3389
So all the open 3389 ports in this 192.168.0.x segment will be exposed.
After this command is executed
will open 254 small windows in the taskbar
Then the Telnet link failed window automatically exits after approximately
=" Http://s4.51cto.com/wyfs02/M02/7E/77/wKiom1cA2J2y4Q0fAAAsDYZC888076.png "title=" 3.png " alt= "Wkiom1ca2j2y4q0faaasdyzc888076.png"/>4) test the efficiency of the script, the larger the network segment to be tested, the longer it takes, the more I have tested the range of more than 2,500 hosts.650) this.width=650; "src=" Http://s4.51cto.com/wyfs02/M00/7E/73/wKioL1cA23fiJVDnAABAOT-33Yo281.png "title=" 4.png " alt= "Wkiol1ca23fijvdnaabaot-33yo281.png"
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