Hi there , some of my clients is having problems to send files to each other with MSN. The problem seems to be that I'm running 2 firewalls behind each other.
PC 1 can't send a file to PC 2 but PC 2 can send a file to PC 1. PC 3 and PC 1 can send files to each other. Now all the pcs can serve the web , ftp , chat , blah blah blah. I'm not blocking any ports what so ever , so it's just masq. and normal packet forwarding. Here's all the information. Help will be apreciated. PC 1 : IP : 10.0.0.10 , Gateway : 10.0.0.1 Firewall 1: eth0 : 193.220.24.230 : uplink , Gateway : 193.220.24.193 eth1 : 10.0.0.1/16 echo " enabling forwarding.." echo "1" > /proc/sys/net/ipv4/ip_forward $IPTABLES -F $IPTABLES -X $IPTABLES -P FORWARD ACCEPT $IPTABLES -t nat -A POSTROUTING -s 10.0.0.1/16 -o eth0 -j MASQUERADE $IPTABLES -A FORWARD -i eth0 -o eth1 -m state --state ESTABLISHED,RELATED -j ACCEPT $IPTABLES -A FORWARD -i eth1 -o eth0 -j ACCEPT Firewall 2: eth0 : 193.220.24.8 eth1 : 193.220.24.193 eth2 : 192.168.1.1 $IPTABLES -F $IPTABLES -X $IPTABLES -P FORWARD ACCEPT $IPTABLES -A FORWARD -i eth0 -o eth1 -m state --state ESTABLISHED,RELATED -j ACCEPT $IPTABLES -A FORWARD -i eth1 -o eth0 -j ACCEPT $IPTABLES -t nat -A POSTROUTING -s 192.168.1.1/24 -o $EXTIF -j MASQUERADE $IPTABLES -A FORWARD -i eth0 -o eth2 -m state --state ESTABLISHED,RELATED -j ACCEPT $IPTABLES -A FORWARD -i eth2 -o eth0 -j ACCEPT PC 2 : IP : 193.220.24.242 , Gateway : 193.220.24.193 PC3 : IP : 192.168.1.10 , Gateway : 192.168.1.1
