OpenVPN 身份驗證/解密數據包錯誤

我正在嘗試將執行 Windos 10 的筆記型電腦連接到執行 OpenVPN 的 Ubuntu 16.04 伺服器。

客戶端不斷收到此錯誤：

MANAGEMENT: >STATE:1491498025,WAIT,,,,,,
Connection reset, restarting [0]
SIGUSR1[soft,connection-reset] received, process restarting
MANAGEMENT: >STATE:1491498025,RECONNECTING,connection-reset,,

我按照本指南設置 OpenVPN。一切都是預設的，除了我更改為埠 443 和 tcp。

在伺服器上，我從“Systemctl status openvpn@server”看到這個錯誤：

ovpn-server[4627]: [IP ADDR] Fatal TLS error (check_tls_errors_co), restarting
ovpn-server[4627]: [IP ADDR] SIGUSR1[soft,tls-error] received, client-instance restarting
ovpn-server[4627]: TCP connection established with [AF_INET][IP ADDR]
ovpn-server[4627]: [IP ADDR] TLS: Initial packet from [AF_INET][IP ADDR], sid=5bf6806d 9c9b6639
ovpn-server[4627]:[IP ADDR] Authenticate/Decrypt packet error: packet HMAC authentication failed
ovpn-server[4627]: [IP ADDR] TLS Error: incoming packet authentication failed from [AF_INET][IP ADDR]
ovpn-server[4627]: [IP ADDR] Fatal TLS error (check_tls_errors_co), restarting
ovpn-server[4627]: [IP ADDR] SIGUSR1[soft,tls-error] received, client-instance restarting

server.conf：

port 443
proto tcp
dev tun
ca ca.crt
cert KICLAB-HV-01.crt
key KICLAB-HV-01.key
dh dh2048.pem
server 10.8.0.0 255.255.255.0
ifconfig-pool-persist ipp.txt
keepalive 10 120
tls-auth ta.key 0
key-direction 0 
mode server
tls-server
cipher AES-128-CBC    # AES
auth SHA256           # SHA256
comp-lzo
user nobody
group nogroup
persist-key
persist-tun
status openvpn-status.log
verb 3

base.conf：

client
dev tun
proto tcp
remote [Internal LAN IP for testing] 443
resolv-retry infinite
nobind
user nobody
group nogroup
persist-key
persist-tun
remote-cert-tls server
cipher AES-128-CBC
auth SHA256 
key-direction 1
comp-lzo
verb 3

客戶端日誌

Attempting to establish TCP connection with [AF_INET][IP:443} [nonblock]
MANAGEMENT: >STATE:1491826387,TCP_CONNECT,,,,,,
TCP connection established with [AF_INET][IP:443}
TCP_CLIENT link local: (not bound)
TCP_CLIENT link remote: [AF_INET][IP:443}
MANAGEMENT: >STATE:1491826388,WAIT,,,,,,
Connection reset, restarting [0]
SIGUSR1[soft,connection-reset] received, process restarting
MANAGEMENT: >STATE:1491826388,RECONNECTING,connection-reset,,,,,
Restart pause, 5 second(s)
TCP/UDP: Preserving recently used remote address: [AF_INET][IP:443}
Socket Buffers: R=[65536->65536] S=[65536->65536]
Attempting to establish TCP connection with [AF_INET][IP:443} [nonblock]
MANAGEMENT: >STATE:1491826393,TCP_CONNECT,,,,,,
TCP connection established with [AF_INET][IP:443}
TCP_CLIENT link local: (not bound)
TCP_CLIENT link remote: [AF_INET][IP:443}
MANAGEMENT: >STATE:1491826394,WAIT,,,,,,
Connection reset, restarting [0]
SIGUSR1[soft,connection-reset] received, process restarting
MANAGEMENT: >STATE:1491826394,RECONNECTING,connection-reset,,,,,
Restart pause, 5 second(s)

“Systemctl Status openvpn@server”的目前輸出（注意，

$$ IP $$實際上不是客戶端的正確 IP。那是問題嗎？）：

MULTI: multi_init called, r=256 v=256
IFCONFIG POOL: base=10.8.0.4 size=62, ipv6=0
IFCONFIG POOL LIST
MULTI: TCP INIT maxclients=1024 maxevents=1028
Initialization Sequence Completed
TCP connection established with [AF_INET][IP]:48758
[IP]:48758 TLS: Initial packet from [AF_INET][IP]:48758, sid=9ab50ac0 a37efe04
[IP]:48758 TLS Error: reading acknowledgement record from packet
[IP]:48758 Fatal TLS error (check_tls_errors_co), restarting
Apr 10 08:36:24 [host] ovpn-server[2191]: [IP]:48758 SIGUSR1[soft,tls-error] received, client-instance restarting

謝謝！

您的配置中沒有客戶端證書。您應該生成一個由您在伺服器上使用的同一個 CA 簽名的證書，並將其添加到 client.conf，如下所示：

ca "ca.crt"
cert "client.crt"
key "client.key"

從 OpenVPN 網站：

–tls-auth 選項使用必須提前生成並在所有對等方之間共享的靜態預共享密鑰 (PSK)。

你在你的伺服器上有它：

tls-auth ta.key 0 # This file is secret
key-direction 0

但是在客戶端上，您已將其註釋掉：

;tls-auth ta.key 1
...
key-direction 1

的第二個參數tls-auth是鍵方向，因此您不需要使用該key-direction節重複它。

在您的伺服器上，只需刪除該key-direction 0行，然後在您的客戶端上刪除註釋分隔符 ( ;) 和該key-direction 1行。

當然，在上述操作真正起作用之前，還需要首先在您的客戶端電腦上 - 使用或類似ta.key方法安全地將其複製到那裡。scp

引用自：https://serverfault.com/questions/843078