How set the source IP adress

[Maksim Kasimov]

Hi,

how to set source ip-address when do __socket.connect((host, port))
on a machine that have a several ip-adresses?

many thanks for advice.

__socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
__socket.connect((host, port))

 

[Irmen de Jong]

Hi,

how to set source ip-address when do __socket.connect((host, port))
on a machine that have a several ip-adresses?

many thanks for advice.

__socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
__socket.connect((host, port))

sock.connect ( ('11.22.33.44', 9999) )

i.e. just put the ip address as string parameter into the connect address tuple
(where you wrote: host)

--Irmen

 

[Grant Edwards]

sock.connect ( ('11.22.33.44', 9999) )

i.e. just put the ip address as string parameter into the
connect address tuple (where you wrote: host)

Um, no. That controls the _destination_ IP address, not the
source. If you want to control the source IP addresss you can
bind it to a local interface's IP address before doing the
connect() call.

sock.bind(('10.0.0.99',-1)) # -1: don't care about source port number
sock.connect((host,port))

That will make sure that 10.0.0.99 is used as the source IP
address. Of course you have to have an interface with that
address.

 

[Grant Edwards]

Um, no. That controls the _destination_ IP address, not the
source. If you want to control the source IP addresss you can
bind it to a local interface's IP address before doing the
connect() call.

sock.bind(('10.0.0.99',-1)) # -1: don't care about source port number
sock.connect((host,port))

Doh! That should have been 0 not -1.