bridging wlan0 to eth0 in wicd

[djemos]

Wow,impressive. Thanks a lot.

Just a question regard the range: Is it necessary to give to the guest (the pc connected to the laptop with the i-net connection) a different net than that running between laptop and gateway/router? In your example, as i understand, your local net to the router runs as 192.168.1.* and the net given to the guest (by dnmasquerade) is 192.168.10.* Correct?

Yes. They cannot have the same i-net address.

Would the connected pc pick up the line without any explicite configuration? (In my case i'd like to share the line, to install a *bsd on an old hp laptop where the built-in wifi is not working out of the box).

Yes. Because of dhcp running on the connected pc.

Finally, should i make the masq.sh file executable? And, why should i call it by sudo, when it is a local (user related file)? Because the instructions in it need superuser power?

Yes can make it executable. You have to run it after wlan0 is up and has an internet ip. Otherwise eth0 will be used and wlan0 will not take an ip.
You have to use sudo because the iptables etc need a super user or root to be executed.

[jsfarinet]

Ok, i hope i got it all. Excellent lesson in networking. Thanks a lot djemos!

PS. Although, the question could be considered as solved: Since wicd allows handling scripts from within would it be possible to define the dnsmasq on/off and the masq.sh commands as a script to be executed eventually from wicd? (Obviously,there should be there dnsmasq and the edit conf file).

[jsfarinet]

I'm still having a problem.

Before all, i've slightly different settings for the local gateway and wlan (which is in the 192.168.10.* range). So i changed in masq.sh and /etc/dnsmasq.conf the values consequentely to 192.168.2.* I think that's coherent (?).

But anyway "sudo route" on the laptop (with the wifi connection to the router/modem) gives me:

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Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         <routername>    0.0.0.0         UG    303    0        0 wlan0
loopback        *               255.0.0.0       U     0      0        0 lo
169.254.0.0     *               255.255.0.0     U     202    0        0 eth0
169.254.34.221  localhost       255.255.255.255 UGH   202    0        0 lo
192.168.10.0    *               255.255.255.0   U     303    0        0 wlan0
darkstar        localhost       255.255.255.255 UGH   303    0        0 lo

And i cannot establish a connection on the pc ...

[djemos]

Your wlan0 has ip like 192.168.10.* range
So try this
on masq.sh
change the second line to

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ifconfig eth0 192.168.20.1 netmask 255.255.255.0

and on dnsmasq.conf

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interface=eth0
dhcp-range=192.168.20.10,192.168.20.19,4h

Your eth0 does not take a net range in your output. You did or typed something wrong.
169.254.0.0 * 255.255.0.0 U 202 0 0 eth0

it should be 4 class net 255.255.255.0

[djemos]

Ok, i hope i got it all. Excellent lesson in networking. Thanks a lot djemos!

PS. Although, the question could be considered as solved: Since wicd allows handling scripts from within would it be possible to define the dnsmasq on/off and the masq.sh commands as a script to be executed eventually from wicd? (Obviously,there should be there dnsmasq and the edit conf file).

yes it is working so you dont have to run it every time laptop reboot

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sudo cp masq.sh /etc/wicd/scripts/postconnect/masq.sh
sudo chmod 755 /etc/wicd/scripts/postconnect/masq.sh

When you execute this command for the first time on laptop

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sudo service start dnsmasq

dnsmasq will always turn on at every boot. So you don't have to do anything more about it.

[jsfarinet]

djemos, first of all thanks a lot for you patience. But still i've problems with sharing the wifi connection over ethernet. I'll come back this evening to report "en detail". Just for the moment, guessing in the dark:

Could there be a problem since i'm running - locally (=on localhost) - privoxy which the forwards to tor ?

[djemos]

I don't know.
But to turn your system as it was before
comment the two lines in dnsmasq.conf

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sudo service stop dnsmasq

or remove dnsmasq

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sudo spkg -d dnsmasq

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sudo sysctl -w net.ipv4.ip_forward=0