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+ 22 June / + + + + + + + + + / + + 筆記 + + + + +
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Ubuntu 18.04 Kernel 4.15.0-106 Unable to Start Wireguard Interface

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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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一開始不管怎麼下指令要啟動wireguard Interface 都會出錯

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root@hqdc034:~# wg-quick up wg0
+[#] ip link add wg0 type wireguard
+RTNETLINK answers: Operation not supported
+Unable to access interface: Protocol not supported
+[#] ip link delete dev wg0
+Cannot find device "wg0"
+root@hqdc034:~# wg-quick up wg1
+[#] ip link add wg1 type wireguard
+RTNETLINK answers: Operation not supported
+Unable to access interface: Protocol not supported
+[#] ip link delete dev wg1
+Cannot find device "wg1"
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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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root@hqdc034:~# wg showconf wg0
+Unable to access interface: Protocol not supported
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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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root@hqdc034:~# modprobe wireguard
+modprobe: FATAL: Module wireguard not found in directory /lib/modules/4.15.0-106-generic
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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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root@hqdc034:~# apt-get install wireguard-dkms wireguard-tools linux-headers-$(uname -r)
+正在讀取套件清單... 完成
+正在重建相依關係          
+正在讀取狀態資料... 完成
+linux-headers-4.15.0-106-generic 已是最新版本 (4.15.0-106.107)。
+linux-headers-4.15.0-106-generic 被設定為手動安裝。
+wireguard-tools 已是最新版本 (1.0.20200513-1~18.04)。
+wireguard-tools 被設定為手動安裝。
+以下套件為自動安裝，並且已經無用：
+  dmeventd liblvm2app2.2 liblvm2cmd2.02 libopts25 libreadline5 python-egenix-mxdatetime python-egenix-mxtools python-psutil
+  python-psycopg2 python3-flask-htmlmin python3-htmlmin sntp
+使用 'apt autoremove' 將之移除。
+下列套件將會被升級：
+  wireguard-dkms
+升級 1 個，新安裝 0 個，移除 0 個，有 123 個未被升級。
+需要下載 254 kB 的套件檔。
+此操作完成之後，會多佔用 1,024 B 的磁碟空間。
+是否繼續進行 [Y/n]？ [Y/n] y
+下載:1 http://ppa.launchpad.net/wireguard/wireguard/ubuntu bionic/main amd64 wireguard-dkms all 1.0.20200611-0ppa1~18.04 [254 kB]
+取得 254 kB 用了 1秒 (184 kB/s)          
+（讀取資料庫 ... 目前共安裝了 298316 個檔案和目錄。）
+準備解開 .../wireguard-dkms_1.0.20200611-0ppa1~18.04_all.deb ...
+
+-------- Uninstall Beginning --------
+Module:  wireguard
+Version: 1.0.20200426
+Kernel:  4.15.0-101-generic (x86_64)
+-------------------------------------
+
+Status: Before uninstall, this module version was ACTIVE on this kernel.
+
+wireguard.ko:
+ - Uninstallation
+   - Deleting from: /lib/modules/4.15.0-101-generic/updates/dkms/
+ - Original module
+   - No original module was found for this module on this kernel.
+   - Use the dkms install command to reinstall any previous module version.
+
+depmod....
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+DKMS: uninstall completed.
+
+------------------------------
+Deleting module version: 1.0.20200426
+completely from the DKMS tree.
+------------------------------
+Done.
+Unpacking wireguard-dkms (1.0.20200611-0ppa1~18.04) over (1.0.20200426-0ppa1~18.04) ...
+設定 wireguard-dkms (1.0.20200611-0ppa1~18.04) ...
+Loading new wireguard-1.0.20200611 DKMS files...
+Building for 4.15.0-106-generic
+Building initial module for 4.15.0-106-generic
+Done.
+
+wireguard:
+Running module version sanity check.
+ - Original module
+   - No original module exists within this kernel
+ - Installation
+   - Installing to /lib/modules/4.15.0-106-generic/updates/dkms/
+
+depmod...
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+
+DKMS: install completed.
+Updating loolwsd systemplate
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跑完之後重起wireguard interface 就 OK 了

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root@hqdc034:~# wg-quick up wg0
+[#] ip link add wg0 type wireguard
+[#] wg setconf wg0 /dev/fd/63
+[#] ip -4 address add 192.168.10.2/24 dev wg0
+[#] ip link set mtu 1420 up dev wg0
+[#] resolvconf -a tun.wg0 -m 0 -x
+[#] ip -4 route add 140.112.0.0/16 dev wg0
+[#] ip -4 route add 104.31.0.0/16 dev wg0
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+root@hqdc034:~# ip a
+1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
+    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
+    inet 127.0.0.1/8 scope host lo
+       valid_lft forever preferred_lft forever
+    inet6 ::1/128 scope host 
+       valid_lft forever preferred_lft forever
+2: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
+    link/ether 00:10:18:14:0f:0a brd ff:ff:ff:ff:ff:ff
+    inet 192.168.11.34/24 brd 192.168.0.255 scope global enp3s0
+       valid_lft forever preferred_lft forever
+    inet6 fe80::2537:5b36:df2:7c0e/64 scope link 
+       valid_lft forever preferred_lft forever
+3: enp0s31f6: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
+    link/ether 70:4d:7b:a3:66:f1 brd ff:ff:ff:ff:ff:ff
+
+30: wg0: <POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1420 qdisc noqueue state UNKNOWN group default qlen 1000
+    link/none 
+    inet 192.168.10.2/24 scope global wg0
+       valid_lft forever preferred_lft forever
+	   
+	   
+root@hqdc034:~# ip r
+default via 192.168.11.253 dev enp3s0 src 192.168.11.34 metric 202 
+10.25.0.0/16 dev LoyaltyNet proto kernel scope link src 10.25.25.1 linkdown 
+104.31.0.0/16 dev wg0 scope link 
+140.112.0.0/16 dev wg0 scope link 
+192.168.10.0/24 dev wg0 proto kernel scope link src 192.168.10.2 
+192.168.11.0/24 dev enp3s0 proto kernel scope link src 192.168.11.34 metric 202 
+root@hqdc034:~# 
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Tags + + Ubuntu + + Wireguard + + +

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+ + Eric Chang + + + Written by: +
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