# WHATPORT(3690)

## NAME

port 3690 — Subversion (svnserve) — svnserve, the standalone Subversion server behind svn:// URLs.

Protocol: TCP  
IANA registry

## DESCRIPTION

svnserve speaks Subversion's own custom protocol on TCP 3690, the transport behind svn:// and svn+ssh:// URLs, as an alternative to serving repositories through Apache and mod_dav_svn on HTTP. The server greets every connection with a plaintext capability list before authentication. It survives on internal build servers, legacy corporate repositories, and appliances that shipped with Subversion; svnserve's default authentication is CRAM-MD5 against a passwd file, with Cyrus SASL as an optional upgrade.

## EXPOSURE

**Do not expose.** The svn:// protocol has no transport encryption — repository contents and CRAM-MD5 exchanges cross the wire in the clear. Use svn+ssh, or mod_dav_svn over HTTPS, for anything off the local network.

## CHECK

```sh
nc -w 3 TARGET 3690 | head -c 60; echo
```

## SEE ALSO

- docs — [Version Control with Subversion — svnserve, a Custom Server](https://svnbook.red-bean.com/en/1.8/svn.serverconfig.svnserve.html) (svnbook.red-bean.com)
- source — [apache/subversion](https://github.com/apache/subversion) (github.com)
- iana — [IANA port registry — 3690 (svn)](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=3690) (iana.org)

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HTML: <https://whatport.net/3690/> · JSON: <https://whatport.net/3690.json> · full dataset: <https://whatport.net/ports.json>