gitea: Cannot clone via Gitea Internal SSH Server

• Gitea version (or commit ref): 1.10.2 / binary installation
• Git version: 2.8.4-1.el7.centos
• Operating system: CentOS 7
• Database (use [x]):
  • PostgreSQL
  • MySQL
  • MSSQL
  • SQLite
• Can you reproduce the bug at https://try.gitea.io:
  • Yes (provide example URL)
  • No
  • Not relevant
• Log gist:

2020/01/10 16:03:34 routers/init.go:39:checkRunMode() [I] Run Mode: Production
2020/01/10 16:03:34 routers/init.go:117:GlobalInit() [I] SSH server started on scm.example.com:2222. Cipher list ([aes128-ctr aes192-ctr aes256-ctr aes128-gcm@openssh.com arcfour256 arcfour128]), key exchange algorithms ([diffie-hellman-group1-sha1 diffie-hellman-group14-sha1 ecdh-sha2-nistp256 ecdh-sha2-nistp384 ecdh-sha2-nistp521 curve25519-sha256@libssh.org]), MACs ([hmac-sha2-256-etm@openssh.com hmac-sha2-256 hmac-sha1 hmac-sha1-96])
2020/01/10 16:03:35 cmd/web.go:151:runWeb() [I] Listen: http://0.0.0.0:3000
2020/01/10 16:03:35 ...ce/gracehttp/http.go:142:Serve() [I] Serving [::]:3000 with pid 12188

Description

Can’t clone repo via build-in SSH Server.

Config:

RUN_USER = gitea
RUN_MODE = prod

[server]
DOMAIN           = scm.example.com
HTTP_PORT        = 3000
ROOT_URL         = http://scm.example.com:3000/
DISABLE_SSH      = false
START_SSH_SERVER = true
SSH_DOMAIN       = scm.example.com
SSH_PORT         = 2222
SSH_LISTEN_HOST  = scm.example.com
SSH_LISTEN_PORT  = 2222

With there settings i can run from Windows Git Bash

$ ssh gitea@scm.example.com -p 2222
agent key RSA SHA256:Wh2+Pn5JhKGXlV8UsMmnG6NIY37LcpgH+NDwTpGpDoc returned incorrect signature type
PTY allocation request failed on channel 0
Hi there, user.name! You've successfully authenticated with the key named user.name@example.com   , but Gitea does not provide shell access.
If this is unexpected, please log in with password and setup Gitea under another user.
Connection to scm.example.com closed.

I can clone repository via HTTP, but when i run git clone ssh://gitea@scm.example.com:2222/repo/path.git via SSH, it’s freezing. I added my ssh pub_key to Gitea user and i suppose if Gitea answer with the message " Hi there, user.name! You’ve successfully authenticated… but Gitea does not provide shell access" it can get/read this pub_key from sqllite db. But it’s not workung for cloning.

There is no FW on this test CentOS instance, i tested to turn off SELinux, no effect.

# lsof -i -P | grep gitea
gitea     12188  gitea   12u  IPv4 130554      0t0  TCP scm.example.com:2222 (LISTEN)
gitea     12188  gitea   13u  IPv6 130559      0t0  TCP *:3000 (LISTEN)

What am i missing?