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POPython: Sockets not working over LAN
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copied!<p>I recently came back from vacation, and my basic python 2 socket server is now unable to communicate with clients over LAN. The server is on a mac, and the client is my raspberry pi or my windows 7 machine. I have simplified the server and client code here to give an example:</p> <p><strong>Server</strong></p> <pre><code>import socket from thread import * HOST = socket.gethostname() print HOST PORT = input ("Enter the PORT number (1 - 10,000)") s = socket.socket(socket.AF_INET, socket.SOCK_STREAM ) s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) print "Socket Created" s.bind((HOST, PORT)) print "Socket Bind Complete" s.listen(10) print "Socket now listening" #Sending message to connected client #This only takes strings (words while True: #Wait to accept a connection - blocking call connection, addr = s.accept() print "Connection Established!" connection.send("Welcome to the server. Type something and hit enter\n") #loop so that function does not terminate and the thread does not end while True: #Receiving from client data = connection.recv(1024) if not data: break connection.sendall(data) print data connection.close() s.close() </code></pre> <p><strong>Client</strong></p> <pre><code>import socket #for sockets s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) print "Socket Created" #Get host and port info to connect host = raw_input("HOST >>> ") port = 2468 s.connect((host, port)) while True: #Send some data to the remote server message = raw_input(">>> ") #set the whole string s.sendall(message) reply = s.recv(1024) print reply </code></pre> <p><strong>Question</strong></p> <p>What is going on here? I am getting the local IP, but the scripts are still not able to communicate. Could it be an issue with the OS's?</p> <hr> <p><strong>MORE INFO</strong></p> <ol> <li><p>Pinging</p> <p>a. I was able to ping the PI from my Mac terminal:</p> <pre><code>PING raspberrypi (67.63.55.3): 56 data bytes 64 bytes from 67.63.55.3: icmp_seq=0 ttl=240 time=17.434 ms 64 bytes from 67.63.55.3: icmp_seq=1 ttl=240 time=18.180 ms 64 bytes from 67.63.55.3: icmp_seq=2 ttl=240 time=22.046 ms 64 bytes from 67.63.55.3: icmp_seq=3 ttl=240 time=25.124 ms 64 bytes from 67.63.55.3: icmp_seq=4 ttl=240 time=31.773 ms </code></pre> <p>b. My PI was not able to find the Mac as a host. I will see what I can do to remedy this.</p> <p>c. My PC was able to PING my mac. My Mac was able to ping my PC</p></li> <li><p>Firewall</p></li> </ol> <p>My Mac's Firewall is off. I will check on the [Raspberry Pi Stackexchange Site] to see if the PI has a firewall. </p> <p>I will add more info once I test my windows machine</p>

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