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Special Forums IP Networking NAT via iptables - Won't work!! Post 302948464 by alirezan1 on Monday 29th of June 2015 08:55:21 PM
Old 06-29-2015
Debian NAT via iptables - Won't work!!

Hi guys

I'm running on debian on a small embedded system. I have a ppp interface that is connected to the internet (and works). My unit also has wifi access point (which works and I can connect to it).

I want to allow connections to the wifi to be able to use the internet from ppp0 interface. So basically want to set up a router type system.
right now, when I connect to my device with my phone, I cannot use the wifi. But on the shell of the embedded system, I can ping, I can load pages, i can do all sorts of things.

Here is what I have set up for my IPtables:

Quote:

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

/sbin/iptables -t nat -A POSTROUTING -o ppp0 -j MASQUERADE
/sbin/iptables -A FORWARD -i ppp0 -o wlan1 -m state --state RELATED,ESTABLISHED -j ACCEPT
/sbin/iptables -A FORWARD -i wlan1 -o ppp0 -j ACCEPT

But i still can't browse internet on my phone.

Any ideas?

Thanks!


Am I
 

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IPTABLES-XML(1) 						  iptables 1.4.21						   IPTABLES-XML(1)

NAME
iptables-xml -- Convert iptables-save format to XML SYNOPSIS
iptables-xml [-c] [-v] DESCRIPTION
iptables-xml is used to convert the output of iptables-save into an easily manipulatable XML format to STDOUT. Use I/O-redirection pro- vided by your shell to write to a file. -c, --combine combine consecutive rules with the same matches but different targets. iptables does not currently support more than one target per match, so this simulates that by collecting the targets from consecutive iptables rules into one action tag, but only when the rule matches are identical. Terminating actions like RETURN, DROP, ACCEPT and QUEUE are not combined with subsequent targets. -v, --verbose Output xml comments containing the iptables line from which the XML is derived iptables-xml does a mechanistic conversion to a very expressive xml format; the only semantic considerations are for -g and -j targets in order to discriminate between <call> <goto> and <nane-of-target> as it helps xml processing scripts if they can tell the difference between a target like SNAT and another chain. Some sample output is: <iptables-rules> <table name="mangle"> <chain name="PREROUTING" policy="ACCEPT" packet-count="63436" byte-count="7137573"> <rule> <conditions> <match> <p>tcp</p> </match> <tcp> <sport>8443</sport> </tcp> </conditions> <actions> <call> <check_ip/> </call> <ACCEPT/> </actions> </rule> </chain> </table> </iptables-rules> Conversion from XML to iptables-save format may be done using the iptables.xslt script and xsltproc, or a custom program using libxsltproc or similar; in this fashion: xsltproc iptables.xslt my-iptables.xml | iptables-restore BUGS
None known as of iptables-1.3.7 release AUTHOR
Sam Liddicott <azez@ufomechanic.net> SEE ALSO
iptables-save(8), iptables-restore(8), iptables(8) iptables 1.4.21 IPTABLES-XML(1)
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