tools

Online Malware Scanner

https://sitecheck.sucuri.net

Site Checker

https://geopeeker.com
https://shotsherpa.com
https://www.browserling.com

Web site Tools

https://www.uptrends.com/tools/traceroute

Site Speed

https://www.uptrends.com/tools/uptime

Email Checker

IP

WHOIS

CIDR

* https://www.ultratools.com/tools/netMask CIDR to Netmask (for hosts.allow)
* http://ip2cidr.com
* http://cidrcalculator.com/ipv4/ip-range-to-cidr/?cy=USD
* [http://www.subnet-calculator.com/cidr.php IP CIDR Calculator]

Website speed test

* http://tools.pingdom.com/fpt/
* http://developers.google.com/speed/pagespeed/insights/
* https://developers.facebook.com/tools/debug/og/object/

DNS Checking

* http://www.dnsinspect.com
* http://www.dnsstuff.com/tools
* http://www.intodns.com
* http://dnscheck.pingdom.com
* http://ViewDNS.info

Ping

* http://www.dnsstuff.com/tools
* [[ping]]
* http://host-tracker.com/ (check your site availability in different country)

TraceRoute

* http://www.traceroute.org (traceroute from various locations)
* http://tools.pingdom.com/ping/

File System

* http://www.clonespy.com (Remove Duplicate files)

Malware

* http://sitecheck.sucuri.net/scanner/ (scan site for malware)
* http://www.unmaskparasites.com
* http://www.stopbadware.org/clearinghouse/search

Domain

* http://www.domainsbot.com
* http://www.whois.sc

SSL Validation

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