wifi hotspot / AP

環境: ubuntu 14.04
DHCP Server
1. sudo aptigude install isc-dhcp-server
2. sudo vim /etc/default/isc-dhcp-server

# On what interfaces should the DHCP server (dhcpd) serve DHCP requests?
# Separate multiple interfaces with spaces, e.g. "eth0 eth1".
INTERFACES="eth0"

/etc/dhcp/dhcpd.conf

ddns-update-style none;

#option domain-name "example.org";
#option domain-name-servers ns1.example.org, ns2.example.org;

default-lease-time 600;
max-lease-time 7200;

log-facility local7;

subnet 192.168.1.0 netmask 255.255.255.0 {
  range dynamic-bootp 192.168.1.192 192.168.1.240;
  option subnet-mask 255.255.255.0;
  option broadcast-address 192.168.1.255;
#  option routers 10.5.5.1;
}

reboot, use ifconfig to check eth0 after booting
Hostapd
1. download hostapd2.6
2. sudo aptitude install libnl-dev, libssl-dev
3. cd hostapd and make
4. sudo hostapd ./hsot.conf
host.conf - no security
(refer usr/share/doc/hostapd/examples/hostapd.conf.gz)

interface=wlan1
driver=nl80211

logger_syslog=-1
logger_syslog_level=2
logger_stdout=-1
logger_stdout_level=2

ctrl_interface=/var/run/hostapd
ctrl_interface_group=0
ssid=test
hw_mode=g
channel=6
beacon_int=100
dtim_period=2
max_num_sta=255
rts_threshold=2347
fragm_threshold=2346
macaddr_acl=0
auth_algs=3
ignore_broadcast_ssid=0
wmm_enabled=1
wmm_ac_bk_cwmin=4
wmm_ac_bk_cwmax=10
wmm_ac_bk_aifs=7
wmm_ac_bk_txop_limit=0
wmm_ac_bk_acm=0
wmm_ac_be_aifs=3
wmm_ac_be_cwmin=4
wmm_ac_be_cwmax=10
wmm_ac_be_txop_limit=0
wmm_ac_be_acm=0
wmm_ac_vi_aifs=2
wmm_ac_vi_cwmin=3
wmm_ac_vi_cwmax=4
wmm_ac_vi_txop_limit=94
wmm_ac_vi_acm=0
wmm_ac_vo_aifs=2
wmm_ac_vo_cwmin=2
wmm_ac_vo_cwmax=3
wmm_ac_vo_txop_limit=47
wmm_ac_vo_acm=0
own_ip_addr=127.0.0.1