Raspberry Pi Access Point Problem

[smithy1155]

Hi,

It's the first time I've tried doing this and all has gone well so far I've been using this https://learn.adafruit.com/setting-up-a ... l-software as a walkthrough guide and it's gone well.

However the problem I have is trying to get an internet connection from the Ethernet port to the WiFi, after doing this code

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sudo iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
sudo iptables -A FORWARD -i eth0 -o wlan0 -m state --state RELATED,ESTABLISHED -j ACCEPT
sudo iptables -A FORWARD -i wlan0 -o eth0 -j ACCEPT

Which established a connection with no problem at all, but after running this code it then tells you to run:

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sudo sh -c "iptables-save > /etc/iptables.ipv4.nat"

So you don't have to keep entering the other commands after boot up, but when I enter the above command it's not saving the IP Tables and I have to keep entering the other commands each time to get a connection.

I'm just wondering if anyone has any solutions or had any problems like this?

Many Thanks

[slashedzero]

Are you certain that you actually installed the utility iptables-save ? You can find out by running

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which iptables-save

Additionally, make sure that that file /etc/iptables.ipv4.nat is actually there and has the correct contents for iptables.

[smithy1155]

You was right it wasn't in

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/etc/iptables.ipv4.nat

I did the code which you suggested and came back with the response of

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/sbin/iptables-save

I've had a look in the folder and seems everything is in there, so I should be correct in saying the code should actually be now

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sudo sh -c "iptables-save > /sbin/iptables.ipv4.nat"

[hortimech]

I don't understand this, you are running this in a terminal on the rpi and you are invoking a shell to run a program and redirecting its output to a file. Why not just run the program directly i.e. sudo iptables-save > /etc/iptables.ipv4.nat

[DougieLawson]

I don't understand this, you are running this in a terminal on the rpi and you are invoking a shell to run a program and redirecting its output to a file. Why not just run the program directly i.e. sudo iptables-save > /etc/iptables.ipv4.nat

Because you need to be root to write to /etc. So spawning a root shell makes it all work better.

[hortimech]

You still don't need the shell: iptables-save | sudo tee /etc/iptables.ipv4.nat

Rowland