Masquerading problems

[Eric Thelin]

I trying to use ip masquerading and getting very strange results.  I
have created an ipchains config script that should work and sort of
does.  It works fine to both addresses on the gateway machine.  Then I
try to ping remote addresses.  The first ping and a few following pings
usually works and then most of the rest are lost.  About 1 in 250 pings
are returned.  I have actually rebuild the machine from scratch and it
still does the same thing.  I had it working about 6 months ago and have
know idea what is different.  My ipchanis config consists of:

/sbin/depmod -a
/sbin/modprobe ip_masq_ftp
echo "1" > /proc/sys/net/ipv4/ip_forward
echo "1" > /proc/sys/net/ipv4/ip_always_defrag
/sbin/ipchains -M -S 7200 10 160
/sbin/ipchains -F
/sbin/ipchains -P forward DENY
/sbin/ipchains -A forward -s 192.168.0.0/16 -j MASQ

Any ideas?  What could even cause this?  Could it be something related
to the fact that the connection I am trying to share is a cable modem?

Eric


-- 
Eric Thelin                                          erict@aztechbiz.com
           AZtechBiz.com: Where Arizona Does Tech Business
               Voice: 480-377-6743   Fax: 480-377-6755