Network is blocked till ping is issued

[DI BACCO ANTONIO - technolabs]

>No.  You are confusing Ethernet frames and IP packets a little bit.
>If a Linux machine receives a SYN from a remote host (not on the same
>network) then the Linux machine needs to ARP for the router that is
>listed as the default route in the routing table.

>If no such default route exists, you will not be able to reach the
>remote host.  If the router doesn't reply to your ARP request, you
>will not be able to reach the remote host.

>Check to make sure you are not having either one of these problems.

I'm on the same network: NotLinux is 100.1.0.1 and Linux is 100.1.0.2
with netmask 255.255.255.0

Thank you,
Antonio.