knocker – a simple and easy to use TCP security port scanner
Knocker is a new, simple, and easy to use TCP security port scanner written in C, using threads. It is able to analyze hosts and the network services which are running on them.
Install knocker
#apt-get install knocker
Reading package lists… Done
Building dependency tree… Done
The following NEW packages will be installed
knocker
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 27.8kB of archives.
After unpacking 119kB of additional disk space will be used.
Get: 1 ftp://kambing.ui.edu stable/main knocker 0.7.1-3 [27.8kB]
Fetched 27.8kB in 0s (40.7kB/s)
Selecting previously deselected package knocker.
(Reading database … 39950 files and directories currently installed.)
Unpacking knocker (from …/knocker_0.7.1-3_i386.deb) …
Setting up knocker (0.7.1-3) …
Now you need to run this program with the following command
#knocker -H 192.168.0.1 -SP 1 -EP 1024
Output looks like below
+—————————————————————————–+
|–=| k n o c k e r — t h e — n e t — p o r t s c a n n e r |=-=[ 0.7.1 ]=-|
+—————————————————————————–+
- started by user root on Fri Nov 7 10:08:45 2008
- hostname to scan: localhost
- resolved host ip: 127.0.0.1
- – scan from port: 1
- – - scan to port: 65535
- – - – scan type: tcp connect
+=- – - – - – - – - – - – - – - – - – - – - – - – - – - – - s c a n n i n g -
-=[ 22/tcp, ssh ]=- * OPEN *
-=[ 25/tcp, smtp ]=- * OPEN *
-=[ 80/tcp, www ]=- * OPEN *
-=[ 111/tcp, sunrpc ]=- * OPEN *
-=[ 113/tcp, auth ]=- * OPEN *
-=[ 783/tcp, spamd ]=- * OPEN *
-=[ 1635/tcp, unknown ]=- * OPEN *
-=[ 2145/tcp, unknown ]=- * OPEN *
-=[ 3306/tcp, mysql ]=- * OPEN *
-=[ 4068/tcp, unknown ]=- * OPEN *
-=[ 10000/tcp, webmin ]=- * OPEN *
-=[ 60000/tcp, unknown ]=- * OPEN *
+=- – - – - – - – - – - – - – - – - – - – - – - – - – - – c o m p l e t e d -
- scanned host name: localhost IP: 127.0.0.1
- found 12 open ports in a total of 65535 ports scanned.
- port scan completed in 4.05 seconds.





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