i am setting up a linux box as router / firewall.currently, im setting up the firewall on that machine..
the situation is :
there are 2 networks, the home network and the work network.
i am connecting the 2 with a vpn connection. the openvpn server is a pc in the home network..
the router/ firewall linux box is another pc in the home network, which i 'inserted' between the ISP modem and the internal switch of my home network.
i have managed to connect the vpn server in the home net to the vpn client at work net and so i can ping directly from the home net (192.168.0.0/24) to the work net (192.168.1.0/24) without using the vpn ip space at all (192.168.150.0/24). which is great..
i did however try to open a remote desktop connection from a home windows pc to a work windows pc and it didnt work. checking the output with dmesg in the firewall linux box it says
Invalid packet: IN=eth0 OUT=eth0 SRC=192.168.0.3 DST=192.168.1.107 LEN=59 TOS=0x00 PREC=0x00 TTL=127 ID=35708 PROTO=TCP SPT=2016 DPT=3389 WINDOW=65535 RES=0x00 ACK PSH URGP=0
any ideas why the packet is considered invalid?