Need help with running et over a reverse tunnel

[bangconghuynh]

Apologies if this is a very naive request for help, but I've not been having any success getting EternalTerminal to work over a reverse tunnel, probably due to my limited experience with networking.

I have a local server behind a NAT, but I would like to ssh into this server publicly. I have access to a public remote server (a Google Cloud VM instance), so from my local server, I can set up remote port forwarding with

local-server:~$ ssh -R 2222:localhost:22 remote-server

which allows me to access the local server from the remote server via port 2222 without any problem:

remote-server:~$ ssh localhost -p 2222

I have also created an entry in the ssh config file on the remote server like so:

Host local-server
  HostName localhost
  Port 2222

and

remote-server:~$ ssh local-server

works fine.

However, if I try

remote-server:~$ et local-server

after successfully authenticating, I get

Error connecting to server: 3: Client is not registered

Rerunning with --verbose=9 and --logtostdout gives

Setting up and starting sentry
[INFO 2024-11-27 11:12:16,149 client-main ParseConfigFile.hpp:1186] /etc/ssh/ssh_config.d/*.confnot found
[INFO 2024-11-27 11:12:16,149 client-main ParseConfigFile.hpp:1405] unsupported config line:     SendEnv LANG LC_*, ignored
[INFO 2024-11-27 11:12:16,149 client-main ParseConfigFile.hpp:1405] unsupported config line:     HashKnownHosts yes, ignored
[INFO 2024-11-27 11:12:16,149 client-main ParseConfigFile.hpp:1405] unsupported config line:     GSSAPIAuthentication yes, ignored
[INFO 2024-11-27 11:12:16,149 client-main TerminalClientMain.cpp:249] Parsed ssh config file, connecting to localhost
[V1 2024-11-27 11:12:16,149 client-main TerminalClientMain.cpp:16] Connecting
[V4 2024-11-27 11:12:16,150 client-main TcpSocketHandler.cpp:83] Before selecting sockFd
[V4 2024-11-27 11:12:16,151 client-main TcpSocketHandler.cpp:87] sockFd 8is selected8
[INFO 2024-11-27 11:12:16,151 client-main TcpSocketHandler.cpp:96] Connected to server: localhost using fd 8
[V1 2024-11-27 11:12:16,151 client-main UnixSocketHandler.cpp:166] Closing connection: 8
[V1 2024-11-27 11:12:16,152 client-main SshSetupHandler.cpp:78] Trying ssh with args: <username>@local-server echo 'XXX0vbaOBt3poR88/kjaIDqT8hau4tJGTxj242HhVrxxvAQkh_xterm-256color' | etterminal --verbose=9

[INFO 2024-11-27 11:12:31,131 client-main SshSetupHandler.cpp:104] etserver started
[V1 2024-11-27 11:12:31,131 client-main ClientConnection.cpp:21] Connecting
[V4 2024-11-27 11:12:31,131 client-main TcpSocketHandler.cpp:83] Before selecting sockFd
[V4 2024-11-27 11:12:31,131 client-main TcpSocketHandler.cpp:87] sockFd 9is selected9
[INFO 2024-11-27 11:12:31,131 client-main TcpSocketHandler.cpp:96] Connected to server: localhost using fd 9
[V1 2024-11-27 11:12:31,131 client-main ClientConnection.cpp:27] Sending id
[V4 2024-11-27 11:12:31,131 client-main UnixSocketHandler.cpp:61] Unixsocket handler write to fd: 9
[V4 2024-11-27 11:12:31,131 client-main UnixSocketHandler.cpp:61] Unixsocket handler write to fd: 9
[V1 2024-11-27 11:12:31,131 client-main ClientConnection.cpp:32] Receiving client id
[V4 2024-11-27 11:12:31,131 client-main Headers.hpp:350] Before selecting sockFd
[V4 2024-11-27 11:12:31,132 client-main UnixSocketHandler.cpp:23] socket 9 has data
[V4 2024-11-27 11:12:31,132 client-main UnixSocketHandler.cpp:45] Unixsocket handler read from fd: 9
[V4 2024-11-27 11:12:31,132 client-main Headers.hpp:350] Before selecting sockFd
[V4 2024-11-27 11:12:31,132 client-main UnixSocketHandler.cpp:23] socket 9 has data
[V4 2024-11-27 11:12:31,132 client-main UnixSocketHandler.cpp:45] Unixsocket handler read from fd: 9
[ERROR 2024-11-27 11:12:31,139 client-main ClientConnection.cpp:40] Stack Trace: 
[0] 0xa63fa void google::protobuf::internal::arena_destruct_object<google::protobuf::internal::InternalMetadata::Container<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >(void*)
[1] 0x5f01a memfd_create
[2] 0x2fc53 memfd_create
[3] 0x7931a742a1ca __libc_init_first
[4] 0x7931a742a28b __libc_start_main
[5] 0x33b35 memfd_create
Error connecting to server: 3: Client is not registered
Error connecting to server: 3: Client is not registered

[INFO 2024-11-27 11:12:31,140 client-main ClientConnection.cpp:64] Got failure during connect
[V1 2024-11-27 11:12:31,140 client-main UnixSocketHandler.cpp:166] Closing connection: 9
[WARNING 2024-11-27 11:12:31,140 client-main TerminalClient.cpp:118] Connecting to server failed: Connect timeout
[V1 2024-11-27 11:12:31,140 client-main TerminalClient.cpp:135] Client created with id: F2FiijpjpeaU3Cel
[V4 2024-11-27 11:12:31,140 client-main TerminalClient.cpp:213] Got data from stdin

I have ensured that port 2022 is opened on the local server, and running et locally on the local server works fine. So I am not sure how to get EternalTerminal to work with the reverse tunnel. Perhaps something to do with me not forwarding the right ports? I'd appreciate any help. Many thanks!

[MisterTea]

What OS are you running on the server? That's a strange protobuf error

[bangconghuynh]

I am running Ubuntu 24.04.1 on the remote server and Arch on the local server. On the Ubuntu remote server, I have et/noble,now 6.2.9-noble1 amd64 and libprotobuf32t64/noble,now 3.21.12-8.2build1 amd64. On the Arch local server, I have eternalterminal 6.2.9-1 and protobuf 28.3-1.

[MisterTea]

I think we should start building static binaries. But for now, can you try building et from source and replacing the etserver and etterminal binaries in /usr/bin with the ones you built?

…

On Wed, Dec 11, 2024, 6:50 PM Bang C. Huynh ***@***.***> wrote: I am running Ubuntu 24.04.1 on the remote server and Arch on the local server. On the Ubuntu remote server, I have et/noble,now 6.2.9-noble1 amd64 and libprotobuf32t64/noble,now 3.21.12-8.2build1 amd64. On the Arch local server, I have eternalterminal 6.2.9-1 and protobuf 28.3-1. — Reply to this email directly, view it on GitHub <#678 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AACK5PZIMQJ5KGFS2LGMUND2FDMUZAVCNFSM6AAAAABSSTFUFKVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDKMZXGUYDKMJUG4> . You are receiving this because you commented.Message ID: ***@***.***>

[bangconghuynh]

I have tried compiling et from source using these instructions (https://github.com/MisterTea/EternalTerminal#debianubuntu), but still run into more or less the same error:

[INFO 2024-12-17 22:36:24,177 client-main ParseConfigFile.hpp:1186] /etc/ssh/ssh_config.d/*.conf not found
[INFO 2024-12-17 22:36:24,177 client-main ParseConfigFile.hpp:1405] unsupported config line:     SendEnv LANG LC_*, ignored
[INFO 2024-12-17 22:36:24,177 client-main ParseConfigFile.hpp:1405] unsupported config line:     HashKnownHosts yes, ignored
[INFO 2024-12-17 22:36:24,177 client-main ParseConfigFile.hpp:1405] unsupported config line:     GSSAPIAuthentication yes, ignored
[INFO 2024-12-17 22:36:24,177 client-main TerminalClientMain.cpp:249] Parsed ssh config file, connecting to localhost
[V1 2024-12-17 22:36:24,177 client-main TerminalClientMain.cpp:16] Connecting
[V4 2024-12-17 22:36:24,178 client-main TcpSocketHandler.cpp:83] Before selecting sockFd
[V4 2024-12-17 22:36:24,178 client-main TcpSocketHandler.cpp:87] sockFd 6 is selected
[INFO 2024-12-17 22:36:24,178 client-main TcpSocketHandler.cpp:96] Connected to server: localhost using fd 6
[V1 2024-12-17 22:36:24,178 client-main UnixSocketHandler.cpp:166] Closing connection: 6
[V1 2024-12-17 22:36:24,179 client-main SshSetupHandler.cpp:78] Trying ssh with args: <username>@local-server echo 'XXX9HSRjEnZnFSIb/feBVHiHYKLpXEiFD4dm8mmfNr2aKm4wx_xterm-256color' | etterminal --verbose=9

[INFO 2024-12-17 22:36:36,056 client-main SshSetupHandler.cpp:104] etserver started
[V1 2024-12-17 22:36:36,056 client-main ClientConnection.cpp:21] Connecting
[V4 2024-12-17 22:36:36,057 client-main TcpSocketHandler.cpp:83] Before selecting sockFd
[V4 2024-12-17 22:36:36,057 client-main TcpSocketHandler.cpp:87] sockFd 7 is selected
[INFO 2024-12-17 22:36:36,057 client-main TcpSocketHandler.cpp:96] Connected to server: localhost using fd 7
[V1 2024-12-17 22:36:36,057 client-main ClientConnection.cpp:27] Sending id
[V4 2024-12-17 22:36:36,057 client-main UnixSocketHandler.cpp:61] Unixsocket handler write to fd: 7
[V4 2024-12-17 22:36:36,057 client-main UnixSocketHandler.cpp:61] Unixsocket handler write to fd: 7
[V1 2024-12-17 22:36:36,057 client-main ClientConnection.cpp:32] Receiving client id
[V4 2024-12-17 22:36:36,057 client-main Headers.hpp:350] Before selecting sockFd
[V4 2024-12-17 22:36:36,057 client-main UnixSocketHandler.cpp:23] socket 7 has data
[V4 2024-12-17 22:36:36,058 client-main UnixSocketHandler.cpp:45] Unixsocket handler read from fd: 7
[V4 2024-12-17 22:36:36,058 client-main Headers.hpp:350] Before selecting sockFd
[V4 2024-12-17 22:36:36,058 client-main UnixSocketHandler.cpp:23] socket 7 has data
[V4 2024-12-17 22:36:36,058 client-main UnixSocketHandler.cpp:45] Unixsocket handler read from fd: 7
[ERROR 2024-12-17 22:36:36,067 client-main ClientConnection.cpp:40] Stack Trace:
[0] 0x59ac32514600
[1] 0x59ac3246cddf
[2] 0x59ac323cecdc
[3] 0x70c5acc2a1ca
[4] 0x70c5acc2a28b __libc_start_main
[5] 0x59ac323c2de5
Error connecting to server: 3: Client is not registered
[INFO 2024-12-17 22:36:36,068 client-main ClientConnection.cpp:64] Got failure during connect
[V1 2024-12-17 22:36:36,068 client-main UnixSocketHandler.cpp:166] Closing connection: 7
[WARNING 2024-12-17 22:36:36,068 client-main TerminalClient.cpp:118] Connecting to server failed: Connect timeout
[V1 2024-12-17 22:36:36,068 client-main TerminalClient.cpp:135] Client created with id: 0HMTLR7G4DSyxZV7
[V4 2024-12-17 22:36:36,068 client-main TerminalClient.cpp:213] Got data from stdin