Reliable network and website monitoring using Paessler's proven and constantly refined IPCheck technology which has been used for network management by many companies from SOHOs to Fortune 500 worldwide since 1997. Sensor types include PING, PORT, HTTP, HTTPS, HTTP Advanced, HTTP Transaction, DNS, SMTP, POP3, FTP, SNMP, as well as various native Windows system sensors and native SQL sensors for MS SQL, MySQL and Oracle. Network management notifications can be triggered by server uptime, downtime, changed webpages, or slow responses. Messages can be sent by email, network broadcast (net send), ICQ, via SMS and to pagers. The free for personal and commercial use is limited to 5 sensors and minimum monitoring interval of 15 minutes. It can be upgraded by requesting a Free 30 Day Trial License or by purchasing a Full License.