Activation (author <-> public) was not working going through mod_jk.

Unfortunately, I'm not able to post any further error messages except than this communication failure notification:

ERROR info.magnolia.cms.exchange.simple.SimpleExchangeServlet 17.01.2007 17:24:08 – Either server not configured or user is not valid
info.magnolia.cms.security.AccessDeniedException: Either server not configured or user is not valid
at info.magnolia.cms.exchange.simple.SimpleExchangeServlet.validateRequest(SimpleExchangeServlet.java:417)
...

It may be a service problem (incomplete strange header entries, bad body etc).

Because mod_jk is a wide spread setup, I suggest, you look into this in more detail.

Currently, I do activation through tomcat's 8080 again, because authoring and public instances are sharing the localhost. But I'm thinking of moving the author to my local network with activation over WAN. And with this situation, I'd like to address the httpd only.

This issue may be one to mod_proxy, too.