Monitors many kinds of servers InterMapper will monitor devices with pings and SNMP. But this may not be enough to determine whether a particular server is actively running. For example, the Web server might have stopped delivering pages, even though the host computer might still be operating and answering pings. Built-in Probes In addition to pings and SNMP probes, InterMapper has dozens of built-in probe types. They are listed in the InterMapper User Guide. A sample selection of the probes is listed below. UDP/DDP Probes SNMP Probes TCP Probes Automatic Ping/Echo DHCP DNS Keyserver Multicast Stream NTP RADIUS RTMP BlitzWatch SNMP Probe SNMPv2c Probe Airport Base Station Basic OID Cisco Aironet Cisco Router Probe Cisco Router v2c Karlnet Wireless MIB TCP Check 4D Server AppleShare IP Basic TCP Custom TCP CVS DND FileMaker FirstClass FTP Gopher HTTP/HTTPS HTTP/HTTPS Post HTTP Proxy HTTP Redirection IMAP4/IMAP4-SSL IRC LDAP/LDAP-SSL Lotus Notes LPR MeetingMaker NNTP POP3 RTSP SMTP SMTP-TLS SNPP Telnet VNC Xserve Monitor Build your own Custom Probes In addition to its set of built-in probes, you can create your own probes based on TCP connections, or on SNMP queries. TCP probes can use a script language to send requests to the device being tested and examine the response to determine the state of the device. SNMP probes can request multiple MIB variables by OID, and then compare the responses to user-defined thresholds to set the state of the device. Command-line (Plugin) Probes InterMapper can run a program "from the command line" to test a device. The program can be any executable program on your platform - C or C++, Perl, Python, shell or .BAT script, etc. The result of the program will set the device's condition. You can develop your own programs, or use some of the the pre-written plugins/scripts that work with NagiosŪ and Big Brother.