FAQ:OpenWRT

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Perso

Install basic packages

opkg update
opkg install diffutils lsof usbutils htop screen

opkg install snmpd
opkg install mount-utils block-mount kmod-usb-storage kmod-fs-ext4 kmod-fs-vfat kmod-fs-exfat kmod-fs-ntfs kmod-fs-hfs kmod-fs-hfsplus kmod-nls-cp437 kmod-nls-iso8859-1

opkg install dnsmasq-full
# Go in http://10.146.199.1/cgi-bin/luci/admin/network/dhcp Advanced Settings and enable both DNSSEC option

DDNS

Install ddns-scripts_nsupdate

  • On the server that will generate Kopenwrt.+157+55429.key and Kopenwrt.+157+55429.private files
dnssec-keygen -a HMAC-md5 -b 512 -n USER openwrt
  • In the /etc/bind9/named.conf.local, update section like this one
key openwrt {
        algorithm HMAC-MD5;
        secret "ADDTHEKEYFROM_openwrt_PRIVATE_FILE";
};

zone "leurent.eu" {
        type master;
        notify yes;
        file "/etc/bind/leurent/leurent.eu.db";
        update-policy { grant openwrt name openwrt.leurent.eu A; };
        ...
};


  • On openwrt box, you can install ddns-scripts_nsupdate + LUCI Interface and have a look at /usr/lib/ddns/update_nsupdate.sh to see how it works
opkg install ddns-scripts_nsupdate luci-app-ddns
  1. Now you can go in LUCI Services / Dynamic DNS section
  2. Use the bind-nsupdate client
    1.  In Basic Settings
      1. Set Lookup Hostname = openwrt.leurent.eu
      2. Set DDNS Service provider [IPv4] = bind-nsupdate
      3. Set Domain = openwrt.leurent.eu
      4.  Set Username = openwrt
      5. Set Password = For the password copy the "secret" of the HMAC-MD5 key
    2. In Advanced Settings
      1.  Set DNS-Server = ns1.leurent.eu

System Commands

Upgrade all packages

screen
opkg update
opkg list-upgradable | cut -f 1 -d ' ' | xargs opkg upgrade

cf https://lede-project.org/docs/user-guide/opkg


Use a Huawei USB LTE HiLink Modem as 4G Backup on my OpenWRT Router


  • Install usb-modeswitch and kmod-usb-net-rndis to switch the LTE stick from USB storage to USB LTE Modem
opkg update
opkg install kmod-usb-net-rndis usb-modeswitch
  • Verify the mode did switch, otherwise insert back the key or reboot
root@LEDE:~# lsusb | grep LTE
Bus 002 Device 003: ID 12d1:14dc Huawei Technologies Co., Ltd. E33372 LTE/UMTS/GSM HiLink Modem/Networkcard
  • Verify that you have a new network interface (eth2 in my case)
root@LEDE:~# dmesg | grep cdc_ether
[   16.075790] usbcore: registered new interface driver cdc_ether
[   19.232911] cdc_ether 2-1:1.0 eth2: register 'cdc_ether' at usb-f10f8000.usb3-1, CDC Ethernet Device, 0c:5b:8f:xx:xx:xx
  • Setup a new wwan interface with eth2 + DHCP mode
uci set network.wwan=interface
uci set network.wwan.ifname='eth2'
uci set network.wwan.proto='dhcp'
uci commit
  • Enable firewall on wwan
uci add_list firewall.@zone[1].network='wwan'
uci commit
  • Restart Router
reboot
  • Go in LUCI Interfaces / Network / Interfaces - WWAN / Advanced Configuration / Set Use gateway metric = 10. So you can see afterwards that the route via WWAN interface is used as backup if the default route goes down
root@OpenWrt:~# ip route
default via 212.147.11.76 dev pppoe-wan 
default via 192.168.8.1 dev eth2  src 192.168.8.100  metric 10 
10.146.199.0/24 dev br-lan scope link  src 10.146.199.1 
192.168.8.0/24 dev eth2 scope link  metric 10 
212.147.11.76 dev pppoe-wan scope link  src 83.228.247.238