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| author | Ivan Nardi <12729895+IvanNardi@users.noreply.github.com> | 2024-09-16 18:38:26 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-09-16 18:38:26 +0200 |
| commit | 0ddbda1f829a2d1b27d7e6519900201111702823 (patch) | |
| tree | 58caea96101eeb330a9490b3565ab3d751af0035 /tests/cfgs/openvpn_heuristic_enabled/config.txt | |
| parent | 47ea30fdaa4eb33d8150bbb0e7d57f9d92c41821 (diff) | |
Add an heuristic to detect encrypted/obfuscated OpenVPN flows (#2547)
Based on the paper: "OpenVPN is Open to VPN Fingerprinting"
See: https://www.usenix.org/conference/usenixsecurity22/presentation/xue-diwen
Basic idea:
* the distribution of the first byte of the messages (i.e. the distribution
of the op-codes) is quite unique
* this fingerprint might be still detectable even if the OpenVPN packets are
somehow fully encrypted/obfuscated
The heuristic is disabled by default.
Diffstat (limited to 'tests/cfgs/openvpn_heuristic_enabled/config.txt')
| -rw-r--r-- | tests/cfgs/openvpn_heuristic_enabled/config.txt | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tests/cfgs/openvpn_heuristic_enabled/config.txt b/tests/cfgs/openvpn_heuristic_enabled/config.txt new file mode 100644 index 000000000..81203be0f --- /dev/null +++ b/tests/cfgs/openvpn_heuristic_enabled/config.txt @@ -0,0 +1 @@ +--cfg=openvpn,dpi.heuristics,0x01 --cfg=packets_limit_per_flow,64 |