[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

RE: Firewall question



>-----Original Message-----
>From: ftpapi-bounces@xxxxxxxxxxxxxxxxxxxxxx
[mailto:ftpapi-bounces@xxxxxxxxxxxxxxxxxxxxxx] On Behalf Of James
Lampert
>Sent: Thursday, March 27, 2008 5:42 PM
>To: 'HTTPAPI and FTPAPI Projects'
>Subject: Firewall question
>
>Are there firewalls out there, such that the request goes out fine, but
the reply from the server is blocked?

Firewalls are usually configured to route by port or service.  I have
seen some misconfigured firewalls that would block web traffic for all
clients except the internal web server, for example.

Most firewalls will not mess with a connection that originated inside
the network though, unless the port numbers change during the
transaction.  For example, if you make a request on port 80 to start
playing a radio station that broadcasts on 8129, the firewall can block
that if configured to block inbound 8129.

Does your service do all communications to & fro on the same port?  Is
it a common port, like 80/443/etc?
-----------------------------------------------------------------------
This is the FTPAPI mailing list.  To unsubscribe, please go to:
http://www.scottklement.com/mailman/listinfo/ftpapi
-----------------------------------------------------------------------