[Zope-dev] passive FTP to Zope with a specified port-range

[Antonio Orlando]

I really dont understand the code, but seems like you are "opening" an 
already "open" connection.

If I'm talking s... so /dev/null

anTONIo


Mr Tobias Schiebeck wrote:

> Hi,
> 
> I'm trying to modify the zope ftp-access to specify a port range 
> within the server selects the ports for the passive ftp communication
> with the ftp-clients. This is in order to have the Zope server behind
> a firewall blocking more then the privileged ports only. 
> 
> I managed to modify the passive_acceptor within the medusa ftp server
> file. The problem I have is that certain FTP clients (e.g. gftp) 
> close there connection because of messages coming from the server.
> 
> The code I have modified is in 
> 
>    /usr/lib/zope/ZServer/medusa/ftp_server.py
> 
> class passive_acceptor (asyncore.dispatcher):
> 	ready = None
> 
> 	def __init__ (self, control_channel):
> 		# connect_fun (conn, addr)
> 		asyncore.dispatcher.__init__ (self)
> 		self.control_channel = control_channel
> 		self.create_socket (socket.AF_INET, socket.SOCK_STREAM)
> 		to=open('/tmp/zope.log','a')
> 		for i in range(10000,11000): 
> 			# bind to an address on the interface that the
> 			# control connection is coming from.
> 			to.write("ftp connection - port %d\n"%i)
> 			bres = self.bind ((
> 				self.control_channel.getsockname()[0],
> 				i
> 				))
> 			to.write("ftp connection - bind:"+`bres`+"\n")
> 			if bres == None :
> 				break
> 		self.addr = self.getsockname()
> 		self.listen (1)
> 		to.close()
> 
> Accessing the Zope-server through a firewall that has only the ports
> 10000 to 11000 open using gftp allows the firs connection but 
> disconnects with an error message when I change the directory.
> 
> The error message is:
> 
> 451 Server Error: socket.error, (98,'Address already in use'): file:
> /usr/lib/zope/ZServer/medusa/asyncore.py line: 250
> 
> Do you have any hints on this?
> 
> Thanks and Best Regards
> 
> Tobias
> 
>