I'm building wifi-router (hostapd, dnsmasq) on Raspberry pi 3 (Raspberrian Stretch). Wlan0 configured as static IP adapter for hostapd. It works fine for eth0 -> wlan0 direction. In this case, wpa_supplicant is empty.
But I cannot share internet from another wifi adapter wlan1 -> wlan0. In this case, wpa_supplicant has network settings and wlan0 connects to the source network.
I had no such problem on raspbian jessie.
How to force wlan0 to not automatically connect to wifi networks?
if wpa_supplicant contains password ifconfig returns following output:
root@raspi3:/home/pi/vrouter# wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.53 netmask 255.0.0.0 broadcast 192.255.255.255
inet6 fe80::69cb:7b25:d42b:e33f prefixlen 64 scopeid 0x20<link>
ether b8:27:eb:53:2d:1d txqueuelen 1000 (Ethernet)
RX packets 266 bytes 50171 (48.9 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 47 bytes 7212 (7.0 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
if wpa_supplicant contains no passwords ifconfig returns proper wlan0 setting:
wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.0.0.1 netmask 255.0.0.0 broadcast 10.255.255.255
inet6 fe80::e460:9b98:5dea:599d prefixlen 64 scopeid 0x20<link>
ether b8:27:eb:53:4d:fd txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 33 bytes 4966 (4.8 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
wpa_supplicant.conf:
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
network={
ssid="my_internet"
psk="qwerty123"
key_mgmt=WPA-PSK
}
interfaces contains only one line:
source-directory /etc/network/interfaces.d
dhcpcd.conf:
hostname
clientid
# Persist interface configuration when dhcpcd exits.
persistent
# Rapid commit support.
# Safe to enable by default because it requires the equivalent option set
# on the server to actually work.
option rapid_commit
# A list of options to request from the DHCP server.
option domain_name_servers, domain_name, domain_search, host_name
option classless_static_routes
# Most distributions have NTP support.
option ntp_servers
# Respect the network MTU. This is applied to DHCP routes.
option interface_mtu
# A ServerID is required by RFC2131.
require dhcp_server_identifier
# Generate Stable Private IPv6 Addresses instead of hardware based ones
slaac private
interface wlan0
static ip_address=10.0.0.1/8
static routers=10.0.0.1
dnsmasq.conf:
no-resolv
interface=wlan0
except-interface=wlan1
except-interface=wlan2
except-interface=wlan3
except-interface=eth0
dhcp-range=10.0.0.3,10.0.0.20,12h
server=8.8.8.8
server=8.8.4.4
log-facility=/var/log/dnsmasq.log
log-queries
hostapd.conf:
interface=wlan0
driver=nl80211
ssid=Raspberry3
channel=6
country_code=US
ieee80211d=1
ieee80211n=1
wmm_enabled=1
hw_mode=g
#auth
wpa=2
wpa_passphrase=Myau1Kot
wpa_key_mgmt=WPA-PSK
wpa_pairwise=TKIP
rsn_pairwise=CCMP
auth_algs=1
macaddr_acl=0
ignore_broadcast_ssid=0
# control
logger_syslog=-1
logger_syslog_level=2
logger_stdout=-1
logger_stdout_level=2
ctrl_interface=/var/run/hostapd
ctrl_interface_group=0