Bug 403 Forbidden for complete GitLab Instance

Current Status:

Solved. But need to be analyzed.
Redis Data will be provided to developers only.

Summary

If I want to access GitLab via Webbrowser - It's not possible. Does only show 403 Access denied.

Steps to reproduce

Dont know what's the Problem Last what I did was using the CI. But everything passed. Later I tried to work again (after Lunch) but nothing worked anymore. Restarted anything - nothing. Restarted Server completely - nothing.

Check by yourself

What is the current bug behavior?

403 Forbidden

What is the expected correct behavior?

Anything except 403

Relevant logs and/or screenshots

Output of checks

Results of GitLab environment info

Expand for output related to GitLab environment info

System information
System:         Debian 8.9
Current User:   git
Using RVM:      no
Ruby Version:   2.3.3p222
Gem Version:    2.6.6
Bundler Version:1.13.7
Rake Version:   12.0.0
Redis Version:  3.2.5
Git Version:    2.13.5
Sidekiq Version:5.0.4
Go Version:     unknown
GitLab information
Version:        9.5.1
Revision:       c47ae37
Directory:      /opt/gitlab/embedded/service/gitlab-rails
DB Adapter:     postgresql
URL:            https://git.primeghost.de
HTTP Clone URL: https://git.primeghost.de/some-group/some-project.git
SSH Clone URL:  git@git.primeghost.de:some-group/some-project.git
Using LDAP:     no
Using Omniauth: yes
Omniauth Providers: gitlab, google_oauth2, facebook, github
GitLab Shell
Version:        5.8.0
Repository storage paths:

• default: /var/opt/gitlab/git-data/repositories Hooks: /opt/gitlab/embedded/service/gitlab-shell/hooks Git: /opt/gitlab/embedded/bin/git

Results of GitLab application Check

Expand for output related to the GitLab application check

Checking GitLab Shell ...
GitLab Shell version >= 5.8.0 ? ... OK (5.8.0)
Repo base directory exists?
default... yes
Repo storage directories are symlinks?
default... no
Repo paths owned by git:root, or git:git?
default... yes
Repo paths access is drwxrws---?
default... yes
hooks directories in repos are links: ...
1/1 ... ok
1/11 ... ok
1/21 ... ok
1/31 ... ok
1/41 ... ok
1/61 ... repository is empty
1/71 ... ok
1/81 ... repository is empty
81/111 ... ok
91/121 ... ok
1/131 ... ok
81/161 ... ok
103/162 ... ok
81/163 ... repository is empty
104/164 ... ok
81/165 ... ok
81/166 ... ok
1/167 ... ok
91/168 ... ok
103/169 ... ok
91/170 ... ok
91/171 ... ok
104/173 ... repository is empty
107/174 ... ok
107/175 ... ok
91/176 ... ok
91/177 ... ok
108/178 ... repository is empty
103/179 ... ok
114/180 ... ok
114/181 ... ok
114/182 ... ok
114/183 ... ok
114/184 ... ok
114/185 ... ok
114/186 ... ok
114/187 ... ok
114/188 ... ok
114/189 ... ok
114/190 ... ok
114/191 ... ok
114/192 ... ok
114/193 ... ok
114/194 ... ok
114/195 ... ok
114/196 ... ok
114/197 ... ok
114/198 ... ok
114/199 ... ok
114/200 ... ok
114/201 ... ok
114/202 ... ok
114/203 ... ok
81/204 ... repository is empty
115/207 ... ok
115/208 ... ok
115/209 ... ok
115/210 ... ok
1/212 ... ok
115/213 ... ok
115/214 ... ok
91/215 ... ok
117/217 ... ok
117/218 ... ok
117/219 ... ok
118/220 ... ok
118/221 ... ok
Running /opt/gitlab/embedded/service/gitlab-shell/bin/check
Check GitLab API access: OK
Access to /var/opt/gitlab/.ssh/authorized_keys: OK
Send ping to redis server: OK
gitlab-shell self-check successful
Checking GitLab Shell ... Finished
Checking Sidekiq ...
Running? ... yes
Number of Sidekiq processes ... 1
Checking Sidekiq ... Finished
Checking Reply by email ...
IMAP server credentials are correct? ... yes
Checking Reply by email ... Finished
Checking LDAP ...
LDAP is disabled in config/gitlab.yml
Checking LDAP ... Finished
Checking GitLab ...
Git configured correctly? ... yes
Database config exists? ... yes
All migrations up? ... yes
Database contains orphaned GroupMembers? ... no
GitLab config exists? ... yes
GitLab config up to date? ... yes
Log directory writable? ... yes
Tmp directory writable? ... yes
Uploads directory exists? ... yes
Uploads directory has correct permissions? ... yes
Uploads directory tmp has correct permissions? ... yes
Init script exists? ... skipped (omnibus-gitlab has no init script)
Init script up-to-date? ... skipped (omnibus-gitlab has no init script)
Projects have namespace: ...
1/1 ... yes
1/11 ... yes
1/21 ... yes
1/31 ... yes
1/41 ... yes
1/61 ... yes
1/71 ... yes
1/81 ... yes
81/111 ... yes
91/121 ... yes
1/131 ... yes
81/161 ... yes
103/162 ... yes
81/163 ... yes
104/164 ... yes
81/165 ... yes
81/166 ... yes
1/167 ... yes
91/168 ... yes
103/169 ... yes
91/170 ... yes
91/171 ... yes
104/173 ... yes
107/174 ... yes
107/175 ... yes
91/176 ... yes
91/177 ... yes
108/178 ... yes
103/179 ... yes
114/180 ... yes
114/181 ... yes
114/182 ... yes
114/183 ... yes
114/184 ... yes
114/185 ... yes
114/186 ... yes
114/187 ... yes
114/188 ... yes
114/189 ... yes
114/190 ... yes
114/191 ... yes
114/192 ... yes
114/193 ... yes
114/194 ... yes
114/195 ... yes
114/196 ... yes
114/197 ... yes
114/198 ... yes
114/199 ... yes
114/200 ... yes
114/201 ... yes
114/202 ... yes
114/203 ... yes
81/204 ... yes
115/207 ... yes
115/208 ... yes
115/209 ... yes
115/210 ... yes
1/212 ... yes
115/213 ... yes
115/214 ... yes
91/215 ... yes
117/217 ... yes
117/218 ... yes
117/219 ... yes
118/220 ... yes
118/221 ... yes
Redis version >= 2.8.0? ... yes
Ruby version >= 2.3.3 ? ... yes (2.3.3)
Git version >= 2.7.3 ? ... yes (2.13.5)
Active users: ... 14
Checking GitLab ... Finished

Possible fixes

Dont have any... Sorry.