I have a really weird issue, I have 3 access points flashed with OpenWrt supporting both 2.4 and 5GHZ.
I'm running v 22.03.3(latest at the moment). But last week I noticed and today I notices again, that some devices refuse to connect to 2.4Ghz.
Last week I disabled 5Ghz and my Iphone13 wouldn't connect to 2.4Ghz.
and today I tried to setup a wireless bridge(also using OpenWrt ) but it wouldn't make connection at all.
it was until I remembered the issue last week that I decided to build the bridge only using 5Ghz which works ok.
Next to that I have a camera probably facing the same issue, because I can't connect it to the wifi and this one only supports 2.4Ghz so 5 is not an option.
I have plenty of devices only supporting 2.4Ghz which are connected without any issues at all. So I was wondering if I could maybe debug something or find something in the debug log?
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OpenWrt 22.03.3, r20028-43d71ad93e
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root@OpenWrt4:~# cat /etc/config/network
config interface 'loopback'
option device 'lo'
option proto 'static'
option ipaddr '127.0.0.1'
option netmask '255.0.0.0'
config globals 'globals'
option ula_prefix '<Some ipv6 address>'
config device
option name 'br-lan'
option type 'bridge'
list ports 'eth0.1'
config interface 'lan'
option device 'br-lan'
option proto 'dhcp'
config switch
option name 'switch0'
option reset '1'
option enable_vlan '1'
config switch_vlan
option device 'switch0'
option vlan '1'
option ports '3 5 0t'
root@OpenWrt4:~# cat /etc/config/wireless
config wifi-device 'radio0'
option type 'mac80211'
option path 'pci0000:00/0000:00:00.0'
option band '5g'
option htmode 'VHT80'
option cell_density '0'
option channel '44'
config wifi-iface 'default_radio0'
option device 'radio0'
option network 'lan'
option mode 'ap'
option ssid '<SSID>'
option encryption 'sae-mixed'
option key '<Password>'
option ieee80211r '1'
option ft_over_ds '0'
option ft_psk_generate_local '1'
config wifi-device 'radio1'
option type 'mac80211'
option path 'platform/ahb/18100000.wmac'
option channel '10'
option band '2g'
option htmode 'HT20'
option cell_density '0'
config wifi-iface 'default_radio1'
option device 'radio1'
option network 'lan'
option mode 'ap'
option ssid '<SSID>'
option key '<password>'
option ieee80211r '1'
option ft_over_ds '0'
option ft_psk_generate_local '1'
option ieee80211w '0'
option encryption 'sae-mixed'
option disassoc_low_ack '0'
root@OpenWrt4:~# cat /etc/config/dhcp
config dnsmasq
option domainneeded '1'
option boguspriv '1'
option filterwin2k '0'
option localise_queries '1'
option rebind_protection '1'
option rebind_localhost '1'
option local '/lan/'
option domain 'lan'
option expandhosts '1'
option nonegcache '0'
option authoritative '1'
option readethers '1'
option leasefile '/tmp/dhcp.leases'
option resolvfile '/tmp/resolv.conf.d/resolv.conf.auto'
option nonwildcard '1'
option localservice '1'
option ednspacket_max '1232'
config dhcp 'lan'
option interface 'lan'
option start '100'
option limit '150'
option leasetime '12h'
option dhcpv4 'server'
config dhcp 'wan'
option interface 'wan'
option ignore '1'
config odhcpd 'odhcpd'
option maindhcp '0'
option leasefile '/tmp/hosts/odhcpd'
option leasetrigger '/usr/sbin/odhcpd-update'
option loglevel '4'
root@OpenWrt4:~# cat /etc/config/firewall
config defaults
option syn_flood 1
option input ACCEPT
option output ACCEPT
option forward REJECT
# Uncomment this line to disable ipv6 rules
# option disable_ipv6 1
config zone
option name lan
list network 'lan'
option input ACCEPT
option output ACCEPT
option forward ACCEPT
config zone
option name wan
list network 'wan'
list network 'wan6'
option input REJECT
option output ACCEPT
option forward REJECT
option masq 1
option mtu_fix 1
config forwarding
option src lan
option dest wan
# We need to accept udp packets on port 68,
# see https://dev.openwrt.org/ticket/4108
config rule
option name Allow-DHCP-Renew
option src wan
option proto udp
option dest_port 68
option target ACCEPT
option family ipv4
# Allow IPv4 ping
config rule
option name Allow-Ping
option src wan
option proto icmp
option icmp_type echo-request
option family ipv4
option target ACCEPT
config rule
option name Allow-IGMP
option src wan
option proto igmp
option family ipv4
option target ACCEPT
# Allow DHCPv6 replies
# see https://github.com/openwrt/openwrt/issues/5066
config rule
option name Allow-DHCPv6
option src wan
option proto udp
option dest_port 546
option family ipv6
option target ACCEPT
config rule
option name Allow-MLD
option src wan
option proto icmp
option src_ip fe80::/10
list icmp_type '130/0'
list icmp_type '131/0'
list icmp_type '132/0'
list icmp_type '143/0'
option family ipv6
option target ACCEPT
# Allow essential incoming IPv6 ICMP traffic
config rule
option name Allow-ICMPv6-Input
option src wan
option proto icmp
list icmp_type echo-request
list icmp_type echo-reply
list icmp_type destination-unreachable
list icmp_type packet-too-big
list icmp_type time-exceeded
list icmp_type bad-header
list icmp_type unknown-header-type
list icmp_type router-solicitation
list icmp_type neighbour-solicitation
list icmp_type router-advertisement
list icmp_type neighbour-advertisement
option limit 1000/sec
option family ipv6
option target ACCEPT
# Allow essential forwarded IPv6 ICMP traffic
config rule
option name Allow-ICMPv6-Forward
option src wan
option dest *
option proto icmp
list icmp_type echo-request
list icmp_type echo-reply
list icmp_type destination-unreachable
list icmp_type packet-too-big
list icmp_type time-exceeded
list icmp_type bad-header
list icmp_type unknown-header-type
option limit 1000/sec
option family ipv6
option target ACCEPT
config rule
option name Allow-IPSec-ESP
option src wan
option dest lan
option proto esp
option target ACCEPT
config rule
option name Allow-ISAKMP
option src wan
option dest lan
option dest_port 500
option proto udp
option target ACCEPT
### EXAMPLE CONFIG SECTIONS
# do not allow a specific ip to access wan
#config rule
# option src lan
# option src_ip 192.168.45.2
# option dest wan
# option proto tcp
# option target REJECT
# block a specific mac on wan
#config rule
# option dest wan
# option src_mac 00:11:22:33:44:66
# option target REJECT
# block incoming ICMP traffic on a zone
#config rule
# option src lan
# option proto ICMP
# option target DROP
# port redirect port coming in on wan to lan
#config redirect
# option src wan
# option src_dport 80
# option dest lan
# option dest_ip 192.168.16.235
# option dest_port 80
# option proto tcp
# port redirect of remapped ssh port (22001) on wan
#config redirect
# option src wan
# option src_dport 22001
# option dest lan
# option dest_port 22
# option proto tcp
### FULL CONFIG SECTIONS
#config rule
# option src lan
# option src_ip 192.168.45.2
# option src_mac 00:11:22:33:44:55
# option src_port 80
# option dest wan
# option dest_ip 194.25.2.129
# option dest_port 120
# option proto tcp
# option target REJECT
#config redirect
# option src lan
# option src_ip 192.168.45.2
# option src_mac 00:11:22:33:44:55
# option src_port 1024
# option src_dport 80
# option dest_ip 194.25.2.129
# option dest_port 120
# option proto tcp
only some devices are not able to connect to 2.4 Ghz but actually all devices I tried connecting in the last week.
I have about 40 2.4Ghz only devices which all work without any issues. (except from the camera mentioned above)
sorry for the late response, I needed a moment to check this where no one needed internet.
So I updated everything to v23.02.4 .
and downgraded security to WPS-PSK,
that actually was a 2 step thing, so in the meanwhile my laptop lost connection and I needed to attach the cable to click save and apply for the 2nd time?
strangly enough,
my esphome devices(all on wifi) kept communicating with Home assistant.
but after downgrading, My Iphone said "password incorrect", where with "sea-mixed" it says unable to connect.
So still not working, but a different message. I still don't know why
wpa2 should be the bare minimum. Apple advises to transition to wpa3 where possible.
With regard to OpenWrt, I personally have not had problems with wpa2 (and my android device), but I have read some forum posts that claimed mixed mode sometimes causes trouble. I am also not sure if the wpa3 functionality is working flawlessly yet either, so wpa2 would be a safe bet. Try that. Try all of them
I tried WPA2 on 2.4Ghz, and all 3 devices which couldn't connect earlier can connect now.
This includes an OpenWrt bridge, so somewhere also OpenWrt handles this different.
unfortunately I cannot use WPA3 only as not all my devices support this.
on 5Ghz, I'm still using mixed mode and there are no issues with it at all, also not for the devices which couldn't connect on 2.4Ghz, so maybe the 5Ghz specs ore drivers are somehow different.
