Solved SOLVED: Edit existing posting: "You don't have permission to access /forum on this server."

Thanks for your hints.
Unfortunately it does not work. I disabled caching of my template (and Joomla as well) an I disabled JS optimization. Same result after empty the cache.

Please update immediately K 3.0.4.

I had 3.0.4 already installed:

Database collation check: The collation of your table fields are correct

Joomla! SEF: Enabled | Joomla! SEF rewrite: Enabled | FTP layer: Disabled |

This message contains confidential information

htaccess: Exists | PHP environment: Max execution time: 30 seconds | Max execution memory: 80M | Max file upload: 16M

Kunena menu details:

Warning: Spoiler!

ID	Name	Menutype	Link	Path
100633	Forum	kunenamenu	view=home&defaultmenu=100633	forum
100634	Index	kunenamenu	view=category&layout=list	forum/index
100635	Aktuell	kunenamenu	view=topics&mode=replies	forum/aktuell
100636	Neues Thema	kunenamenu	view=topic&layout=create	forum/neuesthema
100637	Ohne Antwort	kunenamenu	view=topics&mode=noreplies	forum/ohneantwort
100638	Meine Themen	kunenamenu	view=topics&layout=user&mode=default	forum/meinethemen
100639	Profil	kunenamenu	view=user	forum/profil
100640	Hilfe	kunenamenu	view=misc	forum/hilfe
100641	Suche	kunenamenu	view=search	forum/suche
100632	Forum	mainmenu	Itemid=100633	schnpsforum

Joomla default template details : yoo_radiance | author: YOOtheme | version: 1.0.4 | creationdate: Unbekannt

Kunena default template details : Blue Eagle | author: Kunena Team | version: 3.0.4 | creationdate: 2013-12-22

Kunena version detailed: Kunena 3.0.4 | 2013-12-22 [ Ukko ]
| Kunena detailed configuration:

Warning: Spoiler!

Kunena config settings:
board_offline	0
enablerss	1
threads_per_page	20
messages_per_page	6
messages_per_page_search	15
showhistory	1
historylimit	6
shownew	1
disemoticons	0
template	blue_eagle
showannouncement	0
avataroncat	0
catimagepath	category_images
showchildcaticon	1
rtewidth	450
rteheight	300
enableforumjump	0
reportmsg	0
username	1
askemail	1
showemail	1
showuserstats	1
showkarma	0
useredit	1
useredittime	0
useredittimegrace	600
editmarkup	1
allowsubscriptions	1
subscriptionschecked	1
allowfavorites	0
maxsubject	50
maxsig	300
regonly	0
pubwrite	1
floodprotection	6
mailmod	0
mailadmin	0
captcha	0
mailfull	0
allowavatarupload	1
allowavatargallery	1
avatarquality	90
avatarsize	2048
imageheight	800
imagewidth	800
imagesize	500
filetypes	zip,rar,txt,doc,docx,gz,tgz,pdf,xml,xls,xlsx,mp3,jpg,ppt
filesize	5000
showranking	1
rankimages	1
userlist_rows	0
userlist_online	1
userlist_avatar	1
userlist_name	0
userlist_posts	1
userlist_karma	0
userlist_email	0
userlist_joindate	0
userlist_lastvisitdate	1
userlist_userhits	1
latestcategory	0
showstats	0
showwhoisonline	0
showgenstats	1
showpopuserstats	0
popusercount	5
showpopsubjectstats	1
popsubjectcount	5
usernamechange	0
showspoilertag	1
showvideotag	1
showebaytag	0
trimlongurls	1
trimlongurlsfront	40
trimlongurlsback	20
autoembedyoutube	1
autoembedebay	0
ebaylanguagecode	de-de
sessiontimeout	1800
highlightcode	0
rss_type	post
rss_timelimit	month
rss_limit	100
rss_included_categories
rss_excluded_categories
rss_specification	rss2.0
rss_allow_html	1
rss_author_format	name
rss_author_in_title	1
rss_word_count	0
rss_old_titles	1
rss_cache	900
defaultpage	categories
default_sort	asc
sef	1
showimgforguest	1
showfileforguest	1
pollnboptions	5
pollallowvoteone	1
pollenabled	1
poppollscount	5
showpoppollstats	1
polltimebtvotes	00:15:00
pollnbvotesbyuser	100
pollresultsuserslist	1
maxpersotext	50
ordering_system	mesid
post_dateformat	ago
post_dateformat_hover	datetime
hide_ip	1
imagetypes	jpg,jpeg,gif,png
checkmimetypes	1
imagemimetypes	image/jpeg,image/jpg,image/gif,image/png
imagequality	50
thumbheight	32
thumbwidth	32
hideuserprofileinfo	put_empty
boxghostmessage	1
userdeletetmessage	0
latestcategory_in	1
topicicons	1
debug	0
catsautosubscribed	0
showbannedreason	0
version_check	1
showthankyou	0
showpopthankyoustats	1
popthankscount	5
mod_see_deleted	0
bbcode_img_secure	text
listcat_show_moderators	0
lightbox	1
show_list_time	720
show_session_type	0
show_session_starttime	0
userlist_allowed	1
userlist_count_users	1
enable_threaded_layouts	0
category_subscriptions	post
topic_subscriptions	every
pubprofile	0
thankyou_max	10
email_recipient_count	0
email_recipient_privacy	bcc
captcha_post_limit	0
keywords	0
userkeywords	0
image_upload	registered
file_upload	registered
topic_layout	flat
time_to_create_page	0
show_imgfiles_manage_profile	1
hold_newusers_posts	0
hold_guest_posts	0
attachment_limit	8
pickup_category	0
article_display	intro
send_emails	1
fallback_english	1
cache	1
cache_time	60
iptracking	1
rss_feedburner_url
autolink	1
access_component	1
statslink_allowed	1
userlist_usertype	0
sefutf8	1
changename	0
enablepdf	0
jmambot	1
annmodid	62
userlist_username	1
rules_infb	0
help_infb	0
onlineusers	1

| Kunena integration settings:

Warning: Spoiler!

Kunena - AlphaUserPoints Disabled
Kunena - Community Builder Enabled: access=1 login=0 activity=1 avatar=1 profile=1 private=0
Kunena - Gravatar Disabled
Kunena - JomSocial Disabled
Kunena - Joomla Enabled: access=1 login=0
Kunena - Kunena Enabled: avatar=1 profile=1
Kunena - UddeIM Disabled

| Joomla! detailed language files installed:

Warning: Spoiler!

Joomla! languages installed:
de-DE	German (DE-CH-AT)
en-GB	English (United Kingdom)

Third-party components: CommunityBuilder 1.9.1

Third-party SEF components: None

Plugins: Search - Kunena Search 3.0.1 | Content - Kunena Discuss 3.0.1

Modules: Kunena Latest 3.0.1 | Kunena Login 3.0.1 | Kunena Search 3.0.1

I can view some categories on your forum. Which categories do you have that you get this error with?

I suggest you modify you integration plugin settings as show in red below:

Kunena - AlphaUserPoints Disabled
Kunena - Community Builder Enabled: access=0 login=0 activity=1 avatar=1 profile=1 private=0
Kunena - Gravatar Disabled
Kunena - JomSocial Disabled
Kunena - Joomla Enabled: access=1 login=0
Kunena - Kunena Enabled: avatar=0 profile=0
Kunena - UddeIM Disabled

Yes, I have several categories.
I have the issue in "internes Forum" (means internal forum area). Here just a special Usergroup has access.

But I receive the same "403 Forbidden: You don't have permission to access /forum on this server." message when try to post (unregistered as guest) a new topic in the public area of my forum ("öffentliches Forum").

Regarding the integration plugins:
Kunena - Kunena -> Enabled
- Kunena Avatars YES
- Kunena Profile YES
but both are shown in the report with 0 instead of 1
(I would assume No = 0, Yes = 1)

Kunena - Community Builder -> Enabled
- Access control YES
is shown in the report with 0 instead of 1

May I have to dave it either in the backend or adjust the values via phpmyadmin.
Do you think this has influence to the posting with BC code?

Cheers, Bastian

In my previous message to you I recommended that you set "off" (i.e. "0") those settings. Have you turned off those settings as I suggested? Did they make any difference?