same netmask, Can not block my Ip properly

my eth0 is 196.40.74.126 netmask 255.255.255.240 , gateway is
196.40.74.113 , eth1 196.40.74.125 netmask 255.255.255.240.

it is not a normal network. but my ISP told me have to work this way.
normally the outbound interface has a dfferent netmast than the
inbound interface.

seems that the access fine from outside.



I used this script to block my 196.40.74.116( netmask is
255.255.255.240, gateway is 196.40.74.125) , but not successfully , can
any one tell me why?

any help is appreicated.

# Generated by iptables-save v1.2.11 on Tue Jan 3 08:39:30 2006
*filter
:INPUT ACCEPT [16:792]
:FORWARD DROP [101:5872]
:OUTPUT ACCEPT [34:2692]
:RH-Firewall-1-INPUT - [0:0]
:insideOnly - [0:0]
-A INPUT -d 196.40.74.126 -p tcp -m tcp --dport 22 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 80 -j DROP
-A FORWARD -d 196.40.74.116 -i eth0 -o eth1 -p tcp -m tcp --dport 80 -j
DROP
-A FORWARD -i eth0 -o eth1 -j ACCEPT
-A FORWARD -i eth1 -o eth0 -j ACCEPT
-A insideOnly -i eth0 -m state --state RELATED,ESTABLISHED -j ACCEPT
-A insideOnly -i ! eth0 -m state --state NEW -j ACCEPT
COMMIT
# Completed on Tue Jan 3 08:39:30 2006
# Generated by iptables-save v1.2.11 on Tue Jan 3 08:39:30 2006
*nat
:PREROUTING ACCEPT [30:5452]
:POSTROUTING ACCEPT [12:4200]
:OUTPUT ACCEPT [0:0]
COMMIT
# Completed on Tue Jan 3 08:39:30 2006