Dns setup...

[PhilTheHill]

  208.13.4.zzz  (router with valid internet IP@)-----------LAN
(192.160.10.X)
               |
               |
               |
               |
  192.168.11.a (mail,news server)
  192.168.11.b (web,ftp,dns server)


I would like to setup dns server with this configuration, with port
forwarding on the router... will i be able to contact my servers from
outside ( i have no dns registration on my isp dns server). How is that
possible?

Thanks for any help...

P.