Does anyone know what type of hash this is? and the best way to crack it?

$1$ISpecbPP$oVg.yjqbJd1xONNDObh9j0

site information:
Web Server: Apache/2.2.15 (Unix) mod_ssl/2.2.15 OpenSSL/0.9.8e-fips-rhel5 mod_bwlimited/1.4
Powered-by: PHP/5.2.13
DB Server: MySQL