add unable to start wireguard interface in ubuntu 18.04 with new kernel 4.15.0-106
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@@ -110,7 +110,7 @@ sudo systemctl enable rc-local
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ubuntu 18.04 preseeds files
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````
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```
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# Title: Ubuntu 18.04 preseed.cfg
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#
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# File: templates/os-ubuntu-1804-amd64-preseed.cfg
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@@ -0,0 +1,185 @@
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---
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title: "Ubuntu 18.04 Kernel 4.15.0-106 Unable to Start Wireguard Interface"
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date: 2020-06-22T09:05:42+08:00
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noSummary: false
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categories: ['筆記']
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image: https://h.cowbay.org/images/post-default-16.jpg
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tags: ['Ubuntu','Wireguard']
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author: "Eric Chang"
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keywords:
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- ubuntu
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- Wireguard
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---
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工作用的電腦，昨天終於難得的reboot了(uptime 看了一下，大概是三百多天)
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結果重開機之後，發現原本在打tunnel 連 ptt 的 wireguard VPN 掛掉了
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手動下指令也啟動不了
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查了一下發現是 ubuntu 18.04 kernel 4.15.0-106 的包
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看來就連kernel 最好都不要自動升級...
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<!--more-->
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一開始不管怎麼下指令要啟動wireguard Interface 都會出錯
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```
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root@hqdc034:~# wg-quick up wg0
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[#] ip link add wg0 type wireguard
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RTNETLINK answers: Operation not supported
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Unable to access interface: Protocol not supported
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[#] ip link delete dev wg0
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Cannot find device "wg0"
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root@hqdc034:~# wg-quick up wg1
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[#] ip link add wg1 type wireguard
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RTNETLINK answers: Operation not supported
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Unable to access interface: Protocol not supported
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[#] ip link delete dev wg1
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Cannot find device "wg1"
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```
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因為很久沒動了，所以wireguard config 檔案應該是沒有問題
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不過還是檢查看看？
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```
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root@hqdc034:~# wg showconf wg0
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Unable to access interface: Protocol not supported
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```
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很好，果然不是config 的問題，看來是wireguard 某些套件有狀況了
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用modprobe 檢查一下
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```
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root@hqdc034:~# modprobe wireguard
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modprobe: FATAL: Module wireguard not found in directory /lib/modules/4.15.0-106-generic
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```
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OK ，找到問題了，看起來是新版本的kernel 有某些狀況？
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anyway
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要解決其實很簡單，要不就直接上 20.04 XD
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要不就重裝 wireguard-dkms (這個似乎是新釋出的套件，本來沒有這個的)
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```
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root@hqdc034:~# apt-get install wireguard-dkms wireguard-tools linux-headers-$(uname -r)
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正在讀取套件清單... 完成
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正在重建相依關係
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正在讀取狀態資料... 完成
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linux-headers-4.15.0-106-generic 已是最新版本 (4.15.0-106.107)。
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linux-headers-4.15.0-106-generic 被設定為手動安裝。
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wireguard-tools 已是最新版本 (1.0.20200513-1~18.04)。
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wireguard-tools 被設定為手動安裝。
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以下套件為自動安裝，並且已經無用：
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dmeventd liblvm2app2.2 liblvm2cmd2.02 libopts25 libreadline5 python-egenix-mxdatetime python-egenix-mxtools python-psutil
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python-psycopg2 python3-flask-htmlmin python3-htmlmin sntp
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使用 'apt autoremove' 將之移除。
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下列套件將會被升級：
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wireguard-dkms
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升級 1 個，新安裝 0 個，移除 0 個，有 123 個未被升級。
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需要下載 254 kB 的套件檔。
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此操作完成之後，會多佔用 1,024 B 的磁碟空間。
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是否繼續進行 [Y/n]？ [Y/n] y
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下載:1 http://ppa.launchpad.net/wireguard/wireguard/ubuntu bionic/main amd64 wireguard-dkms all 1.0.20200611-0ppa1~18.04 [254 kB]
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取得 254 kB 用了 1秒 (184 kB/s)
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（讀取資料庫 ... 目前共安裝了 298316 個檔案和目錄。）
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準備解開 .../wireguard-dkms_1.0.20200611-0ppa1~18.04_all.deb ...
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-------- Uninstall Beginning --------
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Module: wireguard
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Version: 1.0.20200426
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Kernel: 4.15.0-101-generic (x86_64)
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-------------------------------------
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Status: Before uninstall, this module version was ACTIVE on this kernel.
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wireguard.ko:
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- Uninstallation
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- Deleting from: /lib/modules/4.15.0-101-generic/updates/dkms/
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- Original module
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- No original module was found for this module on this kernel.
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- Use the dkms install command to reinstall any previous module version.
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depmod....
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DKMS: uninstall completed.
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------------------------------
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Deleting module version: 1.0.20200426
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completely from the DKMS tree.
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------------------------------
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Done.
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Unpacking wireguard-dkms (1.0.20200611-0ppa1~18.04) over (1.0.20200426-0ppa1~18.04) ...
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設定 wireguard-dkms (1.0.20200611-0ppa1~18.04) ...
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Loading new wireguard-1.0.20200611 DKMS files...
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Building for 4.15.0-106-generic
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Building initial module for 4.15.0-106-generic
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Done.
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wireguard:
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Running module version sanity check.
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- Original module
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- No original module exists within this kernel
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- Installation
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- Installing to /lib/modules/4.15.0-106-generic/updates/dkms/
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depmod...
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DKMS: install completed.
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Updating loolwsd systemplate
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```
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跑完之後重起wireguard interface 就 OK 了
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```
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root@hqdc034:~# wg-quick up wg0
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[#] ip link add wg0 type wireguard
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[#] wg setconf wg0 /dev/fd/63
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[#] ip -4 address add 192.168.10.2/24 dev wg0
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[#] ip link set mtu 1420 up dev wg0
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[#] resolvconf -a tun.wg0 -m 0 -x
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[#] ip -4 route add 140.112.0.0/16 dev wg0
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[#] ip -4 route add 104.31.0.0/16 dev wg0
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root@hqdc034:~# ip a
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1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
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link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
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inet 127.0.0.1/8 scope host lo
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valid_lft forever preferred_lft forever
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inet6 ::1/128 scope host
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valid_lft forever preferred_lft forever
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2: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
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link/ether 00:10:18:14:0f:0a brd ff:ff:ff:ff:ff:ff
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inet 192.168.11.34/24 brd 192.168.0.255 scope global enp3s0
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valid_lft forever preferred_lft forever
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inet6 fe80::2537:5b36:df2:7c0e/64 scope link
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valid_lft forever preferred_lft forever
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3: enp0s31f6: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
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link/ether 70:4d:7b:a3:66:f1 brd ff:ff:ff:ff:ff:ff
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30: wg0: <POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1420 qdisc noqueue state UNKNOWN group default qlen 1000
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link/none
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inet 192.168.10.2/24 scope global wg0
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valid_lft forever preferred_lft forever
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root@hqdc034:~# ip r
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default via 192.168.11.253 dev enp3s0 src 192.168.11.34 metric 202
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10.25.0.0/16 dev LoyaltyNet proto kernel scope link src 10.25.25.1 linkdown
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104.31.0.0/16 dev wg0 scope link
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140.112.0.0/16 dev wg0 scope link
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192.168.10.0/24 dev wg0 proto kernel scope link src 192.168.10.2
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192.168.11.0/24 dev enp3s0 proto kernel scope link src 192.168.11.34 metric 202
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root@hqdc034:~#
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```
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