Title says it all 
At the moment I have an ldap server which linux, jira, bamboo and fisheye authenticate against. I understand that I can stick crowd in the middle for jira, bamboo and fisheye, but I can't seem to find any information on configuring the linux boxen to authenticate against crowd.
If crowd doesn't directly support PAM then it would be great if crowd would act as the an LDAP *server*. The whole point of moving away from a "plain" LDAP server is it is too hard to configure and define groups in.
So, is there a native PAM connector for crowd *or* can I get crowd to act as an LDAP server?