解决：vscode连接服务器报错“Failed to set up dynamic port forwarding connection over SSH to the VS Code Server”

问题描述

今天在用vscode远程连接一个新建的华为云ecs弹性云服务器的时候，出现报错：

Failed to set up dynamic port forwarding connection over SSH to the VS Code Server. (Show log)

同时vscode也有个提示：

设置 SSH 主机 xxx.xx.xxx.xx: 正在等待端口转发准备就绪

然后就卡在这了，连不上去。

原因分析

点击报错信息的 show log 查看日志：

[10:51:16.199] Remote server is listening on port 33809
[10:51:16.199] Parsed server configuration: {"serverConfiguration":{"remoteListeningOn":{"port":33809},"osReleaseId":"openEuler","arch":"aarch64","tmpDir":"/run/user/0","platform":"linux","execServerToken":"1a111a1a-a111-11a1-11aa-aa1a111a11aa"},"serverStartTime":38,"installUnpackCode":""}
[10:51:16.199] ** Note: Support for architecture "aarch64" is in preview **
[10:51:16.205] Starting forwarding server. local port 45522 –> socksPort 45512 –> remotePort 33809
[10:51:16.206] Forwarding server listening on port 45522
[10:51:16.207] Waiting for ssh tunnel to be ready
[10:51:16.209] [Forwarding server port 45522] Got connection 0
[10:51:16.211] Tunneled port 33809 to local port 45522
[10:51:16.211] Resolved "ssh-remote+120.46.194.18" to "port 45522"
[10:51:16.222] Initizing new exec server for ssh-remote+120.46.194.18
[10:51:16.222] Resolving exec server at port 45522
[10:51:16.223] >
[10:51:16.224] [Forwarding server port 45522] Got connection 1
[10:51:16.238] Failed to set up socket for dynamic port forward to remote port 33809: Socket closed. TCP port forwarding may be disabled, or the remote server may have crashed. See the VS Code Server log above for details.
[10:51:16.239] Failed to set up socket for dynamic port forward to remote port 33809: Socket closed. TCP port forwarding may be disabled, or the remote server may have crashed. See the VS Code Server log above for details.
[10:51:16.258] > channel 3: open failed: administratively prohibited: open failed
> channel 4: open failed: administratively prohibited: open failed
[10:51:16.259] 错误: 远程主机上似乎禁用了 TCP 端口转发。确保 sshd_config 具有 AllowTcpForwarding yes。如有需要，请与系统管理员联系。

可以看到，问题关键在于最后几行提到的 远程服务器禁用了TCP端口转发 。根据提示也可以得知，需要检查 sshd_config 文件中的 AllowTcpForwarding 设置。

解决方案

通过其他方法登录远程服务器，编辑 sshd_config ：

vim /etc/ssh/sshd_config

找到 AllowTcpForwarding 并将其设置为 yes ：

改完后重启ssh服务：

sudo systemctl restart sshd

然后在vscode中重新连接，成功 👏

🔗 有关vscode连接服务器的基本操作，可以查看 这篇博客