LG is a Looking Glass written in Perl as a CGI script. It can execute almost
all BGP-related commands and do ping and traceroute in routers or relay these
queries to other looking glasses. It supports both IPv4 and IPv6 commands, and
is tested with Cisco, Zebra and Juniper. It can connect to router using either
SSH, telnet or rsh protocol.

WWW: http://wiki.version6.net/LG