Raum/WLAN-Router Access-Point

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WLAN-Router Access-Point

System

Im Raum ist ein TP-Link N750 (Modell: TL-WDR4300) Wireless Gigabit Router installiert, dessen Betriebssystem OpenWrt [1] ist.

Ein passendes Firmware-Image (ath79/generic) kann mit Hilfe des OpenWrt Firmware-Selector [2] ausgewählt und heruntergeladen werden, so dass anschließen die Installation erfolgen kann.

Aktuell ist die Stable Release - OpenWrt 21.02.1 installiert.

Der Router ist über den WAN-Port mit dem Raum-Netz verbunden, der interne Switch wird aktuell nicht genutzt.

Installation

Nach der Installation hat OpenWrt eine voreingestellte IP Adresse (192.168.1.1), die am "internen Switch" bereitgestellt wird.

Der OpenWrt Default-User ist "root", beim erst Login ohne Passwort (leave this blank!).

Für den Betrieb im Raum ist daher die Konfiguration von WAN IP-Adresse, SSH, WLAN und ändern des "root" Passworts nötig.

Konfiguration

WLAN

/etc/config/wireless

config wifi-device 'radio0'
	option type 'mac80211'
	option hwmode '11g'
	option htmode 'HT20'
	option channel '6'
	option country 'DE'
	option txpower '20'
	option legacy_rates '0'
	option path 'platform/ahb/18100000.wmac'

config wifi-device 'radio1'
	option type 'mac80211'
	option hwmode '11a'
	option path 'pci0000:00/0000:00:00.0'
	option htmode 'HT20'
	option country 'DE'
	option channel '40'
	option txpower '20'

config wifi-iface 'wan_radio0'
	option disabled '0'
	option network 'wan'
	option encryption 'psk2'
	option device 'radio0'
	option mode 'ap'
	option key 'Hier_das_Passwort!'
	option ssid 'C3MA'
	option macaddr '8a:e4:a0:f3:5a:2b'
	option ifname 'wan0'

config wifi-iface 'wan_radio1'
	option disabled '0'
	option network 'wan'
	option encryption 'psk2'
	option device 'radio1'
	option mode 'ap'
	option key 'Hier_das_Passwort!'
	option ssid 'C3MA'
	option macaddr '8a:e4:a0:f3:5a:2f'
	option ifname 'wan1'

SSH

/etc/config/dropbear

config dropbear
	option PasswordAuth 'on'
	option RootPasswordAuth 'on'
	option Port         '22'
#	option BannerFile   '/etc/banner'

Firewall

/etc/config/firewall

folgende Regeln hinzufügen:

config forwarding
	option src 'lan'
	option dest 'wan'

config rule
	option name 'Allow-DHCP-Renew'
	option src 'wan'
	option proto 'udp'
	option dest_port '68'
	option target 'ACCEPT'
	option family 'ipv4'

config rule
	option name 'Allow-DHCPv6'
	option src 'wan'
	option proto 'udp'
	option src_ip 'fe80::/10'
	option src_port '547'
	option dest_ip 'fe80::/10'
	option dest_port '546'
	option family 'ipv6'
	option target 'ACCEPT'

config rule 'wan_ssh'
	option dest_port '22'
	option src 'wan'
	option name 'wan_ssh'
	option target 'ACCEPT'
	option proto 'tcp'

Network

/etc/config/network

config interface 'loopback'
	option ifname 'lo'
	option proto 'static'
	option ipaddr '127.0.0.1'
	option netmask '255.0.0.0'

config globals 'globals'
	option ula_prefix 'fdad:a467:2968::/48'

config interface 'wan6'
	option proto 'dhcpv6'
	option ifname 'br-wan'
	option ip6table '1'
	option peerdns '0'
	option sourcefilter '0'
	option reqprefix 'no'
	option dns '2001:4860:4860::8888 2001:4860:4860::8844'

config switch
	option name 'switch0'
	option reset '1'
	option enable_vlan '1'

config switch_vlan
	option device 'switch0'
	option vlan '1'
	option ports '0t 2 3 4 5'

config switch_vlan
	option device 'switch0'
	option vlan '2'
	option ports '0t 1'

config interface 'wan'
	option ifname 'eth0.2'
	option auto '1'
	option peerdns '0'
	option type 'bridge'
	option multicast_querier '0'
	option macaddr '8a:e4:a0:f3:5a:28'
	option igmp_snooping '1'
	option proto 'static'
	option ipaddr '192.168.2.2'
	option netmask '255.255.255.0'
	option gateway '192.168.2.1'
	option dns '192.168.2.1 8.8.8.8'

config rule6 'wan6_lookup'
	option mark '0x01/0x01'
	option lookup '1'

config route6 'wan6_unreachable'
	option type 'unreachable'
	option table '1'
	option target '::/0'
	option metric '65535'
	option gateway '::'
	option interface 'loopback'

System

/etc/config/system

config system
	option timezone 'CET-1CEST,M3.5.0,M10.5.0/3'
	option hostname 'wlan-c3ma'

config timeserver 'ntp'
	option enabled '1'
	option enable_server '0'
	list server 'ptbtime1.ptb.de'

config led 'led_usb1'
	option name 'USB1'
	option sysfs 'tp-link:green:usb1'
	option trigger 'usbdev'
	option dev '1-1.1'
	option interval '50'

config led 'led_usb2'
	option name 'USB2'
	option sysfs 'tp-link:green:usb2'
	option trigger 'usbdev'
	option dev '1-1.2'
	option interval '50'

config led 'led_wlan2g'
	option name 'WLAN2G'
	option sysfs 'tp-link:blue:wlan2g'
	option trigger 'phy0tpt'

Quellen

[1] https://openwrt.org/

[2] https://firmware-selector.openwrt.org/