Resolv

This tool can be used to decrypt the so-called weak (type 7) passwords used by Cisco. Such passwords are not secure because they can be cracked very easily. You should use this tool only for educational / research purposes.

Online tool for DNS (Domain Name System) record inspection. It automatically recognises if the input is a FQDN or an IP address (reverse lookup).

For querying the RFC 3912 database. It automatically recognises if the input is a 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 decodes localised strings encoded using printable US-ASCII characters. It helps you to retrieve the content in a readable form.

This tool converts between decimal and dotted decimal numbering representation vice versa on 32 bits. The format is automatically recognised.

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

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

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