socket send help

Bryan Olson fakeaddress at nowhere.org
Tue Jan 6 01:49:59 CET 2009


Gabriel Genellina wrote:
> Bryan Olson escribió:
> 
>> Gabriel Genellina wrote:
>>> greywine at gmail.com escribió:
>> [...]
>>>> A simple server:
>>>>
>>>> from socket import *
>>>> myHost = ''
>>>  Try with myHost = '127.0.0.1' instead - a firewall might be blocking 
>>> your server.
>>
>> Just a nit: I'd say the reason to use '127.0.0.1' instead of the empty 
>> string is that a firewall might *not* be blocking your server.
>>
>> The Python sockets module interprets the empty string as INADDR_ANY, 
>> which means to bind to all available adapters including the loopback, 
>> A.K.A localhost, A.K.A '127.0.0.1'.
> 
> I thought a firewall would block an attempt to bind to any routeable 
> address, but not to localhost. So using INADDR_ANY would be rejected.

So you thought this would fail at bind()?

My understanding is that firewalls block network traffic, not system calls.


-- 
--Bryan



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