我想要这样的设置：
OpenVPN 客户端 <==> Stunnel 客户端 <==> INTERNET <==> Stunnel 服务器 <==> OpenVPN 服务器
（OpenVPN 客户端仅与 Stunnel 客户端对话，依此类推）
基本上，我想通过 Stunnel 隧道传输我的 OpenVPN 连接。我有两台 ubuntu 机器和两台 GL-INET VPN 路由器。
问题：设置好 stunnel 和 OpenVPN 客户端及服务器的配置后，OpenVPN 客户端的数据包似乎无法到达 stunnel 服务器。我在 Stunnel 客户端（在 ubuntu 机器上运行）上收到“连接被拒绝 (111)”错误。
以下是各个端点的详细信息：
OpenVPN 客户端：GL-Inet OpenVPN 路由器，LAN 连接到 Bell 主路由器
Stunnel 客户端：Ubuntu，LAN 连接到 Bell 主路由器
Stunnel 服务器：Ubuntu，LAN 连接到主 wifi 路由器
OpenVPN 服务器：Ubuntu，LAN 连接到主 wifi 路由器
现在，当我在 OpenVPN 客户端上启动连接时，我在 UBUNTU 客户端上收到以下错误：2023.11.04 21:42:19 LOG3[366]: s_connect: connect 142.198.10.52:443: 连接被拒绝（111）
我该如何修复这个问题并连接到 Stunnel 服务器并最终连接到 OpenVPN？
=======================================
配置：
OpenVPN 客户端：
client
dev tun
proto tcp
remote 192.168.8.229 2222
resolv-retry infinite
nobind
persist-key
persist-tun
auth SHA256
cipher AES-256-GCM
nice 0
mute 5
verb 3
<ca>
-----BEGIN CERTIFICATE-----
MIIDCzCCAfOgAwIBAgIUQrgdPuYAe1NsB5pLVpHmJv35mUswDQYJKoZIhvcNAQEF
-----END CERTIFICATE-----
</ca>
<cert>
-----BEGIN CERTIFICATE-----
MIICtTCCAZ0CFG2ihbYNKpQ9vcnoU8/F+yuYalEPMA0GCSqGSIb3DQEBBQUAMBUx
-----END CERTIFICATE-----
</cert>
<key>
-----BEGIN PRIVATE KEY-----
MIIEvwIBADANBgkqhkiG9w0BAQEFAASCBKkwggSlAgEAAoIBAQDhutA0gHv08iEn
-----END PRIVATE KEY-----
</key>
客户端 STUNNEL 配置：
pid = /var/run/stunnel4/stunnel.pid
output = /var/log/stunnel4/stunnel.log
setuid = stunnel4
setgid = stunnel4
# https://www.stunnel.org/faq.html
socket = r:TCP_NODELAY=1
socket = l:TCP_NODELAY=1
debug = 7
#[yahoo_imaps-client]
#client = yes
#accept = 127.0.0.1:143
#connect = imap.mail.yahoo.com:993
# This requires ca-certificates package
#CApath = /etc/ssl/certs/
#verifyChain = yes
#checkHost = imap.mail.yahoo.com
[ssh_tls-server]
client = yes
accept = 2222
connect = 142.198.10.52:443
PSKsecrets = /etc/stunnel/psk1.txt
客户端连接日志：
2023.11.04 21:42:19 LOG7[main]: FD=4 events=0x2001 revents=0x0
2023.11.04 21:42:19 LOG7[main]: FD=9 events=0x2001 revents=0x1
2023.11.04 21:42:19 LOG7[main]: Service [ssh_tls-server] accepted (FD=3) from 192.168.8.1:37032
2023.11.04 21:42:19 LOG7[366]: Service [ssh_tls-server] started
2023.11.04 21:42:19 LOG7[366]: Setting local socket options (FD=3)
2023.11.04 21:42:19 LOG7[366]: Option TCP_NODELAY set on local socket
2023.11.04 21:42:19 LOG5[366]: Service [ssh_tls-server] accepted connection from 192.168.8.1:37032
2023.11.04 21:42:19 LOG6[366]: s_connect: connecting 142.198.10.52:443
2023.11.04 21:42:19 LOG7[366]: s_connect: s_poll_wait 142.198.10.52:443: waiting 10 seconds
2023.11.04 21:42:19 LOG7[366]: FD=6 events=0x2001 revents=0x0
2023.11.04 21:42:19 LOG7[366]: FD=11 events=0x2005 revents=0x0
2023.11.04 21:42:19 LOG3[366]: s_connect: connect 142.198.10.52:443: Connection refused (111)
2023.11.04 21:42:19 LOG3[366]: No more addresses to connect
2023.11.04 21:42:19 LOG5[366]: Connection reset: 0 byte(s) sent to TLS, 0 byte(s) sent to socket
2023.11.04 21:42:19 LOG7[366]: Local descriptor (FD=3) closed
2023.11.04 21:42:19 LOG7[366]: Service [ssh_tls-server] finished (0 left)
服务器 OpenVPN：
client
dev tun
proto tcp
remote 142.198.10.52 443
resolv-retry infinite
nobind
persist-key
persist-tun
auth SHA256
cipher AES-256-GCM
nice 0
mute 5
verb 3
<ca>
-----BEGIN CERTIFICATE-----
MIIDCzCCAfOgAwIBAgIUQrgdPuYAe1NsB5pLVpHmJv35mUswDQYJKoZIhvcNAQEF
-----END CERTIFICATE-----
</ca>
<cert>
-----BEGIN CERTIFICATE-----
MIICtTCCAZ0CFG2ihbYNKpQ9vcnoU8/F+yuYalEPMA0GCSqGSIb3DQEBBQUAMBUx
-----END CERTIFICATE-----
</cert>
<key>
-----BEGIN PRIVATE KEY-----
MIIEvwIBADANBgkqhkiG9w0BAQEFAASCBKkwggSlAgEAAoIBAQDhutA0gHv08iEn
-----END PRIVATE KEY-----
</key>
服务器 Ubuntu Stunnel：
pid = /var/run/stunnel4/stunnel.pid
output = /var/log/stunnel4/stunnel.log
setuid = stunnel4
setgid = stunnel4
# https://www.stunnel.org/faq.html
socket = r:TCP_NODELAY=1
socket = l:TCP_NODELAY=1
debug = 7
#[yahoo_imaps-client]
#client = yes
#accept = 127.0.0.1:143
#connect = imap.mail.yahoo.com:993
# This requires ca-certificates package
#CApath = /etc/ssl/certs/
#verifyChain = yes
#checkHost = imap.mail.yahoo.com
[openvpn]
client = no
cert = /etc/stunnel/stunnel.pem
accept = 192.168.2.167:9999
connect = 192.168.2.75:1194
ciphers = PSK
PSKsecrets = /etc/stunnel/psk1.txt
服务器初始化日志（虽然连接启动时什么也没有发生）：
服务器初始化日志
2023.11.04 17:31:57 LOG7[main]: Found 1 ready file descriptor(s)
2023.11.04 17:31:57 LOG7[main]: FD=4 events=0x2001 revents=0x0
2023.11.04 17:31:57 LOG7[main]: FD=9 events=0x2001 revents=0x1
2023.11.04 17:31:57 LOG7[main]: Service [openvpn] accepted (FD=3) from 172.104.242.173:40259
2023.11.04 17:31:57 LOG7[0]: Service [openvpn] started
2023.11.04 17:31:57 LOG7[0]: Setting local socket options (FD=3)
2023.11.04 17:31:57 LOG7[0]: Option TCP_NODELAY set on local socket
2023.11.04 17:31:57 LOG5[0]: Service [openvpn] accepted connection from 172.104.242.173:40259
2023.11.04 17:31:57 LOG6[0]: Peer certificate not required
2023.11.04 17:31:57 LOG7[0]: TLS state (accept): before SSL initialization
2023.11.04 17:36:57 LOG6[0]: ssl_start: s_poll_wait: TIMEOUTbusy exceeded: sending reset
2023.11.04 17:36:57 LOG7[0]: FD=6 events=0x2001 revents=0x0
2023.11.04 17:36:57 LOG7[0]: FD=3 events=0x2001 revents=0x0
2023.11.04 17:36:57 LOG5[0]: Connection reset: 0 byte(s) sent to TLS, 0 byte(s) sent to socket
2023.11.04 17:36:57 LOG7[0]: Local descriptor (FD=3) closed
2023.11.04 17:36:57 LOG7[0]: Service [openvpn] finished (0 left)