Resolv

This tool can be used to decrypt the so-called weak (type 7) passwords used by Cisco. You should use this tool only for educational / research purposes.

A tool for checking DNS records. It is automatically detected whether the query is an FQDN or an IP address (reverse lookup).

For querying the RFC 3912 database. It is automatically detected whether the input is an FQDN or an IP address / range.

This tool sends ICMPv4 or ICMPv6 echo request packets and displays the response.

An RFC 2047 Email MIME Decoder. It displays localized strings encoded with US-ASCII characters in readable form.

This tool converts between decimal and dotted decimal representations of 32-bit numbers (vice versa). The format is automatically recognized.

It converts between the ASN representations described in RFC 5396. Useful for 32-bit BGP ASN planning. The formats are automatically recognized.

It calculates the number of nodes in a full mesh network topology by specifying the number of connections.

n=(1+sqrt(1+8*s))/(2)