Linux – How to use the mode master with the ath5k driver

access-pointlinuxUbuntuwifiwlan

In this page, they says that we can use the AP mode with the ath5k driver since linux 2.6.31

I am using Ubuntu Karmic with : linux 2.6.31-16-generic

I would like to share my eth0 WAN connection creating a wlan0 LAN.
Browsing on the Internet, I saw that we can use hostapd to do that.

The main problem is this command :

$ sudo iwconfig wlan0 mode master
Error for wireless request "Set Mode" (8B06) :
    SET failed on device wlan0 ; Invalid argument.

How can I make my AP mode working with Karmic ?

Best Answer

HostAP is quite particular about the combination of cards and drivers that it can support. Have you tried it with the madwifi drivers instead?

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127.128.129.0 is the network id for your subnet, try changing it to a valid address i.e. 127.128.129.0 to 127.128.129.1 and see is it helps.

Linux Networking – How to Route Between Two Networks on Linux

If you have 2 NICs on a Linux box, both configured with IP's you don't have to add a route from one network to another. That will be done automatically.

Add a default gateway address on the WAN NIC. Do not do this in the configuration of the LAN NIC.

Then enable forwarding in the kernel:

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

To make it auto-set this value on boot uncomment this line in/etc/sysctl.conf

#net.ipv4.ip_forward=1

Then set up some rules in iptables to perform the natting and forwarding:

# Always accept loopback traffic
iptables -A INPUT -i lo -j ACCEPT

# We allow traffic from the LAN side
iptables -A INPUT -i eth0 -j ACCEPT

######################################################################
#
#                         ROUTING
#
######################################################################

# eth0 is LAN
# eth1 is WAN

# Allow established connections
iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
# Masquerade.
iptables -t nat -A POSTROUTING -o eth1 -j MASQUERADE
# fowarding
iptables -A FORWARD -i eth1 -o eth0 -m state --state RELATED,ESTABLISHED -j ACCEPT
# Allow outgoing connections from the LAN side.
iptables -A FORWARD -i eth0 -o eth1 -j ACCEPT

that should do it.

Best Answer

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Linux – Setting up access to FTP server and SSH server using hostapd access point on embedded system

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