CentOS - Apr 2006 - Iptables port forwarding help

Hello,

I have a webcam that I wish to view from the internet.  It is a wireless
linksys model with an ip address of 192.168.1.15.  I have it set on port
8081, 192.168.1.15:8081.

I am using the IP Masquerade HowTo script.  Here's the rule I added to my
firewall script:

EXTIF="ppp0"
INTIF="eth1"
EXTIP="`$IFCONFIG $EXTIF | grep inet | cut -d : -f 2 | cut -d \  -f
1`"


$IPTABLES -A FORWARD -i $EXTIF -o $INTIF -p tcp --dport 8081 -m state \
 --state NEW,ESTABLISHED,RELATED -j ACCEPT

$IPTABLES -A PREROUTING -t nat -p tcp -d $EXTIP --dport 8081 \
 -j DNAT --to 192.168.1.15:8081

Its not working.  Can anyone offer a suggestion?

TIA

Is IP forwarding turned on?

  echo 1 > /proc/sys/net/ipv4/ip_forward


On Thu, Apr 13, 2006 at 07:29:53PM -0400, Thomas E Dukes
wrote:
> Hello,
> 
> I have a webcam that I wish to view from the internet.  It is a wireless
> linksys model with an ip address of 192.168.1.15.  I have it set on port
> 8081, 192.168.1.15:8081.
> 
> I am using the IP Masquerade HowTo script.  Here's the rule I added to
my
> firewall script:
> 
> EXTIF="ppp0"
> INTIF="eth1"
> EXTIP="`$IFCONFIG $EXTIF | grep inet | cut -d : -f 2 | cut -d \  -f
1`"
> 
> 
> $IPTABLES -A FORWARD -i $EXTIF -o $INTIF -p tcp --dport 8081 -m state \
>  --state NEW,ESTABLISHED,RELATED -j ACCEPT
> 
> $IPTABLES -A PREROUTING -t nat -p tcp -d $EXTIP --dport 8081 \
>  -j DNAT --to 192.168.1.15:8081
> 
> Its not working.  Can anyone offer a suggestion?
> 
> TIA
> 
> 
> _______________________________________________
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> CentOS at centos.org
> http://lists.centos.org/mailman/listinfo/centos

danno
--
dan pritts - systems administrator - internet2
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