On Fri, 23 Jan 2004, MSullivan wrote: > then send SYN through TCP client..... What software are you using on the PIC that requires you to know about SYN packets? > because the mailserver is outside the 255.255.255.0 mask (ie 32.x.x.x > compared to 192.x.x , the LAN router address is used ? to ARP? to send SYN > to mailserver IP? Since the mail server is off your LAN, you have to ARP for the router's address, then use the router's MAC address with the mail server's IP address for all the packets you are directing to the mail server. -- John W. Temples, III -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics