SNMP can be a hidden gem that seems to be overlooked sometimes during penetration testing. It is really cool the information you can obtain just using snmpwalk from the command line however the information can be lengthy and unless you are an SNMP OID library or feel like googling a bunch of different stuff it really helps to have tools such as snmpcheck available. Below we describe what snmpcheck, which is written in Perl, will accomplish for you and we also provide a couple of examples against Ubuntu and a Cisco router.
The next tool up for review in the DNS section of the Backtrack 4 menu is a short script called lbd.sh. This is a small shell script with only one purpose and that is to check whether a domain is using load balncing. A common host in front of a bank of Web servers may be a load-balancing device or a Web redirector, so this information can be good to know.