[Pdns-users] Pipebackend can't run backend

Dan Campbell - dan@us.ibm.com dan at us.ibm.com
Thu Jan 21 20:48:44 UTC 2021

I just installed the Authoritative server 4.4.0 on a CentOS 8 virtual machine and I’m trying to get a simple pipebackend running.

The backend is a python script that runs from the command line, but pdns_server fails to start and give the following error:

[PIPEBackend] Unable to launch, fatal argument error: Command '/home/webapps/dns/bin/backend.py' cannot be executed: Permission>
Caught an exception instantiating a backend: Command '/home/webapps/dns/bin/backend.py' cannot be executed: Permission denied
Cleaning up
Distributor caught fatal exception: Command '/home/webapps/dns/bin/backend.py' cannot be executed: Permission denied

The permissions on the script and all directories in the path are 755 …

Any ideas about why pdns_server (running under the pdns id) does not have permissions to run a program with 755 permissions?

Dan Campbell
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