AIC8800D80 Enable AP Mode

george

Install hostapd (requires internet connection)

sudo apt install hostapd

Enable encryption mode for 2.4G hotspot
Enter the following content, using the 11ax wireless standard, encryption method WPA-PSK, ssid as hotspot name, and wpa_passphrase as custom password, all of which can be modified

vi /etc/hostapd.conf

interface=wlan0
driver=nl80211
ctrl_interface_group=0
ctrl_interface=/var/run/hostapd
beacon_int=100
ssid=aic_ax_2.4G
country_code=CN
channel=6
hw_mode=g
ieee80211n=1
ieee80211ac=1
ieee80211ax=1
ht_capab=[HT20][SHORT-GI-20][HT40-][HT40+][SHORT-GI-40]
wmm_enabled=1
he_basic_mcs_nss_set=65534
auth_algs=3
wpa=3
wpa_passphrase=1234567890
wpa_key_mgmt=WPA-PSK
wpa_pairwise=CCMP
rsn_pairwise=CCMP

Add Address Resolution

 vi /etc/dnsmasq.conf

# Only monitor the AP interface
interface=wlan0
bind-interfaces

# DHCP configuration
dhcp-range=192.168.11.2,192.168.11.20,255.255.255.0,24h
dhcp-option=3,192.168.11.1
dhcp-option=6,8.8.8.8,114.114.114.114
resolv-file=/etc/dnsmasq/resolv.conf

Create /etc/dnsmasq/resol.conf

mkdir -p /etc/dnsmasq
vi /etc/dnsmasq/resolv.conf

Enter the following content

nameserver 8.8.8.8
nameserver 8.8.4.4

Create script to enable AP mode

vi /usr/bin/start_wifi_ap.sh

Enter the following content

#!/bin/bash
#
## Search for network interfaces starting with wlan
WIFI_IFACE=wlan0

# Configure IP address
ifconfig $WIFI_IFACE 192.168.11.1 up

# Start hostapd
hostapd /etc/hostapd.conf -dd &

# Start dnsmasq
touch /var/lib/misc/udhcp.leases
dnsmasq -i $WIFI_IFACE -C /etc/dnsmasq.conf &

echo "AIC WiFi AP started on interface $WIFI_IFACE"

Modify permissions

chmod a+x /usr/bin/start_wifi_ap.sh

Add IP forwarding rules

sudo sh -c "echo 1 > /proc/sys/net/ipv4/ip_forward"

Edit /etc/sysctl.d/10-network-security.conf and add the following line

net.ipv4.ip_forward=1

Effective operation

sudo sysctl -p

Download Iptables (requires internet connection, can be skipped if installed at the top)

sudo apt update
sudo apt install iptables-persistent
sudo apt install iptables

Add rule

sudo update-alternatives --set iptables /usr/sbin/iptables-legacy
sudo update-alternatives --set ip6tables /usr/sbin/ip6tables-legacy
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
sudo iptables -A FORWARD -i wlan0 -o eth0 -j ACCEPT
sudo iptables -A FORWARD -i eth0 -o wlan0 -m state --state RELATED,ESTABLISHED -j ACCEPT

Afterwards, every time the AP is turned on, it can be started through the startw_ifi_ip.sh script. If you want it to start automatically, please add a service to implement it yourself.

admin@cp2b:~$ sudo start_wifi_ap.sh 
[sudo] password for admin: 
AIC WiFi AP started on interface wlan0