MSullivan wrote :

> if I'm understanding correctly...

I wouldn't bet on that...

> not sure I am because is not
> working......   I have a local network....   on it are a laptop... a
> desktop....  the PIC card I am developing code for....  and a router
> connected to a cable modem to the internet...   the PIC card
> address is
> 192.168.0.20    ... desktop   192.168.0.2 ...  laptop
> 192.168.0.10 ...
> router  192.168.0.1 .....   and the mailserver IP  is  32.x.x.x ....
>
> so I ARP request and get a respone...

What response ?

> then send    SYN

Where to ?

> through TCP client.....
>
> and should get back an ACK flag.... but instead I get back
> RST (reset) flag....

Now, you do know how IP routing works, right ?

In short, your "client" should see that the target IP
address is outside the local netmask, and then send
the request (route) through your router.

Now, does the PIC software support routing ?

>
> because the mailserver  is outside the 255.255.255.0 mask
> (ie 32.x.x.x compared to 192.x.x ,  the LAN router addres
> is used ? to ARP?  to send SYN to mailserver IP?

In a way...  ...I think...

Jan-Erik.

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