Re: What is Passive mode anyway?
Hi Daniel!
Passive mode means that the server behaves passively.
Traffic to an ftp server works as follows:
Client (Port 1024-65535) initiates a connection to Server (usually port
21, but cinfigurable)
Now:
active: Server opens a data connection (backwards) from Port 20 to
client (1024-65535)
OR:
passive: Client opens data connection (from port 1024-65535) to server
(port 1024-65535).
That means in passive mode all connections are initiated from the cliend
inside the firewall. Often, firewalls don´t allow any incoming
connections (i.e. the SYN-bit may not be set).
Daniel de los Reyes schrieb:
>
> Can somebody explain what Passive mode is, so maybe I can understand my way out of this?
>
> ______________________________
> Daniel de los Reyes
> S2-Selling Soluciones
> Valencia Spain
> e-mail: dadecal@s2-selling.com
> Powered by Debian GNU-Linux 2.2r2
> ______________________________
>
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--
--
Norman Schmidt Universitaet Erlangen-Nuernberg
cand.chem. Sysadmin Wohnheimnetzwerk RatNET
mailto:schmidt@naa.net
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