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Top Forums Programming c functions to turn off open ports in linux Post 302471096 by anand121 on Friday 12th of November 2010 01:50:09 AM
Old 11-12-2010
c functions to turn off open ports in linux

nmap is a network utility which gives u information about open ports on ur system. for eg

$ nmap 10.226.112.202

PORT STATE SERVICE
7/tcp open echo
13/tcp open daytime
22/tcp open ssh
23/tcp open telnet
37/tcp open time
1100/tcp open unknown

these open ports can be closed manually by editing /etc/inetd.conf file.

I want to write C functions which should close ports by running that c programs. for eg; c function should close above mentioned telnet port on 23.
 

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SIZE(1) 						      General Commands Manual							   SIZE(1)

NAME
size - print the size of the sections in an object file SYNOPSIS
size [ option ... ] [ object ... ] DESCRIPTION
Size (without the -m option) prints the (decimal) number of bytes required by the __TEXT, __DATA and __OBJC segments. All other segments are totaled and that size is listed in the `others' column. The final two columns is the sum in decimal and hexadecimal. If no file is specified, a.out is used. The options to size(1) are: - Treat the remaining arguments as name of object files not options to size(1). -m Print the sizes of the Mach-O segments and sections as well as the total sizes of the sections in each segment and the total size of the segments in the file. -l When used with the -m option, also print the addresses and offsets of the sections and segments. -x When used with the -m option, print the values in hexadecimal (with leading 0x's) rather than decimal. -arch arch_type Specifies the architecture, arch_type, of the file for size(1) to operate on when the file is a fat file. (See arch(3) for the cur- rently know arch_types.) The arch_type can be "all" to operate on all architectures in the file. The default is to display only the host architecture, if the file contains it; otherwise, all architectures in the file are shown. SEE ALSO
otool(1) BUGS
The size of common symbols can't be reflected in any of the numbers for relocatable object files. Apple Computer, Inc. May 23, 2002 SIZE(1)
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