Grils builds failures in dependency resolution

I have an assembly that doesn't work when run over SSH with the following problem:

WARN: problem while downloading module descriptor:

http://[internal_artifactory]:8081/artifactory/repo/org/grails/plugins/[plugin]/1.0/[plugin]-1.0.pom

Access is denied (156ms)

      

        
        
        
      

    

I checked the Artifactory logs and saw that the download was "accepted", so there is no authentication issue with this (besides, Artifactory is configured to download anonymously). If I check the ivy cache I can see that a file is being created ivy-1.0.xml.original.part

but nothing else is being loaded. I have checked the permissions on that directory and the user who is running Jenkins as well as the SSH user has full permission on the plus-cache directory. I'm at a loss here - if I run it right on the server it works fine but calls it SSH from Jenkins.