Bug 820211

Description of problem:

I'm using a USB dongle as a wireless access point via hostapd:
Bus 001 Device 004: ID 050d:705a Belkin Components F5D7050 Wireless G Adapter
v3000 [Ralink RT2573]

Bug 716988 was just closed because my USB dongle started working 1st time
every time. Unfortunately, that was short lived. I've just tried booting all
three kernels on my machine, and kernel-3.3.2-6.fc16.x86_64 and kernel-3.3.4-3.fc16.x86_64 both fail to work. The oldest kernel kernel-3.3.2-1.fc16.x86_64 works perfectly.

The failure mode is completely different now though. Everything appears to
work fine. I get connected, I even get assigned an IP by my DHCP server, all
NAT iptables rules seem to be setup correctly, etc. Unfortunately, no
traffic makes it through the interface. I can't even talk directly to my
desktop which is the gateway, much less talk to anything in the outside world.

Version-Release number of selected component (if applicable):
kernel-3.3.2-6.fc16.x86_64 and kernel-3.3.4-3.fc16.x86_64

How reproducible:
Seems 100%, it apparently connects successfully, yet fails to talk every time
I try on the newer kernels.

Steps to Reproduce:
1. see above
  
Actual results:
No traffic via wlan0

Expected results:
Talking to the internet normally.

Additional info:

I'm not using NetworkManager, I starting things up "by hand". Here's the
script that starts the access point running once I plug in the USB dongle:

#!/bin/sh
#
# Run as root - brings up the access point
#
ifconfig wlan0 netmask 255.255.255.0 192.168.9.1
sleep 1
service iptables start
sleep 1
service hostapd start
sleep 1
systemctl start dhcpd.service

Here's the /etc/sysconfig/iptables used to do the NATting:

# Generated by iptables-save v1.4.9 on Fri May 20 09:58:26 2011
*nat
:PREROUTING ACCEPT [34:2176]
:OUTPUT ACCEPT [55:4168]
:POSTROUTING ACCEPT [55:4168]
-A POSTROUTING -o em1 -j MASQUERADE 
COMMIT
# Completed on Fri May 20 09:58:26 2011
# Generated by iptables-save v1.4.9 on Fri May 20 09:58:26 2011
*filter
:INPUT ACCEPT [392008:153506294]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [364620:51248845]
COMMIT
# Completed on Fri May 20 09:58:26 2011

And here's the hostapd.conf file with password and ssid hidden:

ctrl_interface=/var/run/hostapd
ctrl_interface_group=root
macaddr_acl=0
auth_algs=1
ignore_broadcast_ssid=1
wpa=2
wpa_key_mgmt=WPA-PSK
wpa_pairwise=TKIP
rsn_pairwise=CCMP
wpa_passphrase=**********
driver=nl80211
interface=wlan0
hw_mode=g
channel=11
ssid=*******