MODEM ADSL ROUTER 2BFIREWALL

(linux-br)Modem ADSL como roteador e BRIDGE firewall!
Até aqui tudo bem mas, o que não estou conseguindo é pegar o IP (dinâmico > -adsl speedy) no modem quando ele estiver em modo "router".
modem router adsl: modem router wireless adsl | modem adsl router
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