How do you use Radmin 3.0 to connect to a computer over the internet?

At first "connect through host"
it means that you have a radmin server that you connect to, to connect to other server may have "ip filter"
the "ip filter" is a list of "ip" that can establish connection with the server

then the pic become you have 3 PC
#1 is you
#2 is host
#3 is the PC you want to connect with

#1 Add #2 in the "host" Field And type #3 Address in the ip Field
we use it if #3 have ip filter enabled and accept #2 ip

2- connect over the Internet

at first you must define the external IP
we use some sort of DYNDNS server in the Adsl modem
like no-ip or dyndns and it is depends on your ADSL modem model

then we make port forward in the dsl modem also
to forward any 4899 (radmin default port) to the PC we want

b.s: this PC we can make it host so we can connect to any other internal LAN PC

then in the Clint side you type the dyndns address in the ip Field then you make connection

so it is all depends on the dsl modem that you have
B.S: just add the model i will write a full article to you

Source(s):

this is radmin answer
http://www.radmin.com/support/kb/index.php?ID=2850
this is the famus "port forward" howto
http://www.portforward.com/
this is Wikipedia Dynamic Dns article
http://en.wikipedia.org/wiki/Dynamic_dns
this is a FREE Dynamic Dns server that you can use
http://www.dyndns.com/

source