regular expression for MAC address validation


 
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# 22  
Old 11-08-2007
With bash, I use the following regexp:
Code:
egrep "^([0-9a-fA-F]{2}\:){5}[0-9a-fA-F]{2}$"

It's simpler than the one below and accepts capital letters as well.

Quote:
Originally Posted by hcclnoodles
OK this works perfectly (using egrep rather than sed)


Code:
#!/bin/ksh
echo enter mac
read mac
result=$( echo $mac | egrep ^[0-9a-f][0-9a-f]\:[0-9a-f][0-9a-f]\:[0-9a-f][0-9a-f]\:[0-9a-f][0-9a-f]\:[0-9a-f][0-9a-f]\:[0-9a-f][0-9a-f]$ )
if [ -z $result ]; then
  echo mac doesnt comply
else
echo mac is fine
fi

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MACTELNET(1)						      General Commands Manual						      MACTELNET(1)

NAME
mactelnet - A tool for telneting via MAC addresses SYNOPSIS
mactelnet [options] <MAC-Address|hostname> DESCRIPTION
This tool enables you to telnet other RouterOS or MAC-Telnetd enabled devices. You can connect to either a hostname or a MAC address. If specified, the hostname (identity) will be looked up via MNDP discovery. OPTIONS
These programs follow the usual GNU command line syntax. A summary of options is included below. -n Do not use broadcast packets. A tad less insecure but requires root privileges. This means that ethernet packets will have the specified mac-address as the packet destination, instead of using the ethernet broadcast address. -t Amount of seconds to wait for a response on each interface. If you have several network interfaces, this is the timeout value per interface. -u Specify username. Without this option, you will need to enter the username in a interactive prompt. -p Specify password. Without this option, you will need to enter the password in a interactive prompt. -h Show summary of options. -v Show version of program. SEE ALSO
mndp(1), mactelnetd(1), macping(1). AUTHOR
mactelnet was written by Hakon Nessjoen <haakon.nessjoen@gmail.com>. This manual page was written by Hakon Nessjoen <haakon.nessjoen@gmail.com>, for the Debian project (and may be used by others). February 27, 2011 MACTELNET(1)