Cyberduck Mountain Duck CLI

#10025 closed defect (thirdparty)

Blocked by server for port scan attempt

Reported by: tronster Owned by:
Priority: normal Milestone:
Component: core Version: Nightly Build
Severity: normal Keywords: port scan
Cc: Architecture:
Platform: Mac OS X 10.11


I am unsure if this is a duplicate of 7165 ( ) but my ISP has blocked me from 2 IP addresses because after an attempt or two to connect to an account for the first time via SFTP appeared to them as a "port scan".

FYI: I choose "nightly" as 6.3.0 is not present. I received this issue with a previous version too (6.1?)

Change History (3)

comment:1 Changed on Jul 26, 2017 at 5:53:39 AM by dkocher

  • Summary changed from Cyberduck Appears as a PortScan to Blocked by server for port scan attempt

comment:2 Changed on Jul 26, 2017 at 6:58:43 AM by dkocher

  • Resolution set to thirdparty
  • Status changed from new to closed

We do a network diagnostics check to make sure the server is reachable (implemented in system frameworks) that open a connection to UDP port 7 –

comment:3 Changed on Jul 26, 2017 at 11:30:40 AM by tronster

Perhaps add an option (off by default) to prevent the network diagnostic? This appears to have happened before with Cyberduck, and taking no action means you'll likely get more users affected by this in the future.

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