following my results from various commands you provided. thank you very much!
sudo psql -h /var/run/caldavd/ccs_postgres_3d403b3009fe0c830944d87bd751fbe9 -d caldav -U caldav
psql (9.2.4)
Type "help" for help.
caldav=# select calendar_resource_id from calendar_bind where calendar_resource_name is null;
calendar_resource_id
----------------------
67
22
711
467
711
61
1206
711
22
22
22
67
711
22
368
383
307
1206
711
1206
711
:
connecting to the ical server
curl -vv -k https://***:8443/
* Adding handle: conn: 0x7fb10b00aa00
* Adding handle: send: 0
* Adding handle: recv: 0
* Curl_addHandleToPipeline: length: 1
* - Conn 0 (0x7fb10b00aa00) send_pipe: 1, recv_pipe: 0
* About to connect() to *** port 8443 (#0)
* Trying ***...
* Connected to *** () port 8443 (#0)
* SSL 3.0 connection using TLS_RSA_WITH_AES_128_CBC_SHA
* Server certificate:
* Server certificate: COMODO High-Assurance Secure Server CA
* Server certificate: AddTrust External CA Root
> GET / HTTP/1.1
> User-Agent: curl/7.30.0
> Host: ***:8443
> Accept: */*
>
< HTTP/1.1 401 Unauthorized
< Content-Length: 141
* Server Twisted/12.2.0 TwistedWeb/9.0.0 is not blacklisted
< Server: Twisted/12.2.0 TwistedWeb/9.0.0
< DAV: 1, access-control, calendar-access, calendar-schedule, calendar-auto-schedule, calendar-availability, inbox-availability, calendar-proxy, calendarserver-private-events, calendarserver-private-comments, calendarserver-sharing, calendarserver-sharing-no-scheduling, calendar-query-extended, calendar-default-alarms, calendar-managed-attachments, calendarserver-partstat-changes, extended-mkcol, calendarserver-principal-property-search, calendarserver-principal-search, calendarserver-home-sync
< Date: Wed, 30 Oct 2013 14:25:43 GMT
< Strict-Transport-Security: max-age=604800
< WWW-Authenticate: digest nonce="02e398a35ef4690d76e99281", realm="***", opaque="a342f21efcb3b72e5b88d7fac069e4fb-MDJlMzk4YTM1ZWY0NjkwZDc2ZTk5MjgxLDMxLj I0LjE0LjI0MiwxMzgzMTQzMTQz", algorithm="md5"
< Content-Type: text/html;charset=utf-8
< Connection: close
<
* Closing connection 0
<html><head><title>Unauthorized</title></head><body><h1>Unauthorized</h1><p>You are not authorized to access this resource.</p></body></html>
on the client i get a status code "500" CalDAVAccountRefreshQueueableOperation as soon as the iCal has connected to the server.