[Zope] Limit Zope only from Pound

[Juan Javier Carrera Obrero]

Hello, I have installed pound and zope in different machines. Pound is a 
IP: 192.168.1.1 and Zope is in IP: 192.168.1.5:8080. Pound  balances to 
Zope, correctly.

Although, I want than Zope does not visible from external, that is to 
say, Zope is only accessible from Pound (and not with 
http://192.168.1.5:8080 manually) . I have tried con "ip-address", but 
it does not run.

Anybody do knows how do it ?

Thanks !