te paso mi archivo hosts haber que tengo que hacer:

# Copyright (c) 1993-2006 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
#
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
#
# For example:
#
#      102.54.94.97     rhino.acme.com          # source server
#       38.25.63.10     x.acme.com              # x client host

127.0.0.1 xxx.no-ip.biz
192.168.x.x xxx.no-ip.biz

pòn....
127.0.0.1 xxx.no-ip.biz
192.168.x.x xxx.no-ip.biz
ip-externa xxx.no-ip.biz

otro problemita  ya puedo entrar tod perfecto pero no entiendo bien lo de creacion de web luego de configurar ese archivo que hago ? como hago para ver mi web =? y ver si funciona ? otra cosita xq al entrar con mi dk no tengo los puntos ? ni la parte donde se ponen la monturas ? m ayudan x favor ?

He puesto todo como me has dicho tomass pero sigue sin ir... te pongo todo:

Archivo host:

# Copyright (C) 1993-2006 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# sp Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
#
# For example:
#
#      102.54.94.97     rhino.acme.com          # source server
#       38.25.63.10     x.acme.com              # x client host

127.0.0.1xxx.no-ip.biz
192.168.x.x xxx.no-ip.biz
xx.xxx.xxx.xxx xxx.no-ip.biz

Y el realm.conf:

#######################################################################
# ArcEmu Realms Configuration File
# Last updated at revision rev.1875
#######################################################################

#********************************************************************************
#* How to use this config file:                                                 *
#* Config files are in a block->variable->setting format.                       *
#* A < signifies the opening of a block, the block name is expected after that. *
#* After the block name, a space and then the settings sperated by = / ' '.     *
#*                                                                              *
#* e.g.                                                                         *
#* <block setting="0" someval = "1">                                            *
#*                                                                              *
#* Comments can be in C format, e.g. /* some stuff */, with a // at the start   *
#* of the line, or in shell format (#).                                         *
#********************************************************************************/

#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#
# LogonServer Section
#
#    Address:
#      The address (no port) of the server.
#
#    Port:
#      The port on which the logon server listens. (*** NOT 3724 ***)
#
#    Name:
#      Not really relavant, but name the logon.
#
#    RealmCount:
#      The number of realms in the next section.
#
#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#

<LogonServer Address = "xxx.no-ip.biz"
   Port = "8093"
   Name = "Nombre"
   RealmCount = "1">

#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#
# Realm Section
#
#    Name:
#      The name of the realm.
#   
#    Address:
#      The address (and port) of that realm.
#
#    Icon:
#      The type of realm (PVP, Normal, RPPVP, RP)
#
#    TimeZone:
#      The location of the server (1=Development, 2=United States, 3=Oceanic, 4=Latin America,
#       5=Tournament, 6=Korean, 8=English, 9=German, 10=French)
#
#    Population:
#      (0 = low, 1 = medium, 2 = high)
#
#   Important information below
#
#     change 127.0.0.1 to your EXTERNAL ip if you wish to have a PUBLIC server.
#     This issues come up a lot!
#
#    Timezone values :
#   0=Korean            16=China
#   1=Development            17=CN1
#   2=United States            18=CN2
#   3=Oceanic            19=CN3
#   4=Latin America            20=CN4
#   5=Tournament            21=CN5
#   6=Korean            22=CN6
#   8=English            23=CN7
#   9=German            24=CN8
#   10=French            25=Tournament
#   11=Spanish            26=Test Server
#   12=Russian            27=Tournament
#   13=Tournament            28=QA Server
#   14=Taiwan            29=CN9
#   15=Tournament            30=TestServer2
#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#

<Realm1 Name = "Nombre"
   Address = "xxx.no-ip.biz:8129"
   Icon = "PVP"
   Population = "1.0"
   TimeZone = "1">

Bueno muchas gracias por esta gran guia ya tengo todo perfecto el server me anda de maravilla de nuevo muchas gracias pero ahora viene lo dificil la correccion de los bug`s.