Notice (2018-05-24): bugzilla.xamarin.com is now in
Please join us on
Visual Studio Developer Community and in the
Mono organizations on
GitHub to continue tracking issues. Bugzilla will remain
available for reference in read-only mode. We will continue to work
on open Bugzilla bugs, copy them to the new locations
as needed for follow-up, and add the new items under Related
Our sincere thanks to everyone who has contributed on this bug
tracker over the years. Thanks also for your understanding as we
make these adjustments and improvements for the future.
Please create a new report on
GitHub or Developer Community with
your current version information, steps to reproduce, and relevant error
messages or log files if you are hitting an issue that looks similar to
this resolved bug and you do not yet see a matching new report.
This has the effect of causing TcpClient construction to throw an Access Denied exception when used in a sandboxed Mac application that does not have (nor I assume should actually require) the server entitlement.
Seen in system logs on creation of TcpClient using the parameterless constructor:
Apr 21 23:28:08 malkavian kernel: Sandbox: Creepr(24416) deny network-bind *:0
A successful workaround has been to create a new implementation of TcpClient that has the Bind call removed in all cases except for when using the constructor that takes a local endpoint as the only argument.
It should be fixed in master