[ILUG] Routing ppp and a null modem cable

[Bryan O'Donoghue]

To be honest, I've gone and cheated a little bit and just used iptables and slip.

#########################################################
			SERVER
#########################################################

slattach -p slip -s 9600 /dev/ttyS0 &

ifconfig sl0 192.168.3.1 pointopoint 192.168.3.2

modprobe iptable_nat

iptables -t nat -A POSTROUTING -s 192.168.3.0/24 -d ! 192.168.3.0/24 -j MASQUERADE

iptables -t nat -A POSTROUTING -s 192.168.3.0/24 -d 192.168.3.0/24 -j ACCEPT

iptables -A INPUT -s ! 192.168.3.0/24 -d 192.168.3.0/24 -m state --state 
ESTABLISHED -j ACCEPT

iptables -A INPUT -s 192.168.3.0/24 -d ! 192.168.3.0/24 -m state --state 
NEW,ESTABLISHED -j ACCEPT


#######################################################
			CLIENT
#######################################################

slattach -p slip -s 9600 /dev/ttyS0 &

ifconfig sl0 192.168.3.2 pointopoint 192.168.3.1

ip route add 10.100.100.0/24 via 192.168.3.1

--------------------------------------------------------

At which point pinging 10.100.100.x works from the box on the other side of the 
slip connection.

Blah

-- 
Bryan O'Donoghue
Embedded Software Engineer

Europlex Technologies Ltd
Clonshaugh Business & Technology Park
Dublin 17
Ireland

T:+353 (0) 1 2500500
F:+353 (0) 1 2500590
E:bryano at europlex.ie
W:www.europlex.ie


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