errata.txt

On page 21:
ephemeral range in linux as described is inaccurate, check /proc/sys/net/ipv4/ip_local_port_range

On page 21:
says that client uses recv instead of recvfrom, but code listing in book says otherwise.
On page 21:
Note that the Python program can always use a socket's getsockname() method to retrieve the current IP and port to which the socket is bound.

Warning: As documented here: http://bugs.python.org/issue1049

The behavior and return value for calling socket.socket.getsockname() on 
an unconnected unbound socket is unspecified. On UNIX, it returns an 
address ('0.0.0.0', 0), while on Windows it raises an obscure exception 
"error: (10022, 'Invalid argument')".
On page 26:

The first code listing:

>>> import socket
>>> s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
>>> s.sendto('Fake reply', ('127.0.0.1', 47873))

The indentation for the second line appears wrong. It looks like there is whitespace before the "s =", when there shouldn't be.

On page 68:

script dns_mx.py resolves the hostname of all the mx records to the same IP address.
In resolve_hostname "name = sys.argv[1]"should be changed to "name = hostname"

On page 73:

Instead of being stored as four decimal digits 4, 4, 2, and 3 with ...

should be:

Instead of being stored as four decimal digits 4, 2, 5, and 3 with ...

On page 122:

(from the queue module)

should be:

(from the Queue module)

note the capital Q

On page 243:
"remove" should be "remote" in:

"A locally stored message can be uploaded directly to one of the remove folders"