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[GH-ISSUE #2501] Ressource access not allowed / No valid auth #2175

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opened 2026-04-16 09:12:49 -05:00 by GiteaMirror · 4 comments
GiteaMirror commented 2026-04-16 09:12:49 -05:00
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Originally created by @elcajon on GitHub (Feb 18, 2026).
Original GitHub issue: https://github.com/fosrl/pangolin/issues/2501

Describe the Bug

When accessing my public resources, I noticed that some of them are not available. I noticed that I get the following error messages in the logs when accessing a page (regardless of whether the access works or not). I suspect that a successful access is delivered from the local browser cache and bypasses authentication. (wild guess)

pangolin         | 2026-02-18T11:02:19+00:00 [info]: Resource access not allowed. Resource ID: 16. IP: 2a02:xxx.
pangolin         | 2026-02-18T11:02:19+00:00 [info]: Resource access not allowed. Resource ID: 16. IP: 2a02:xxx.
pangolin         | 2026-02-18T11:02:19+00:00 [info]: Resource access not allowed. Resource ID: 16. IP: 2a02:xxx.
pangolin         | 2026-02-18T11:02:20+00:00 [info]: Resource access not allowed. Resource ID: 16. IP: 2a02:xxx.
pangolin         | 2026-02-18T11:02:20+00:00 [info]: Resource access not allowed. Resource ID: 16. IP: 2a02:xxx.
pangolin         | 2026-02-18T11:02:20+00:00 [info]: Resource access not allowed. Resource ID: 16. IP: 2a02:xxx.
pangolin         | 2026-02-18T11:02:20+00:00 [info]: Resource access not allowed. Resource ID: 16. IP: 2a02:xxx.

Accessing the Pangolin UI (which is also randomly available) there are the following related access log entries:

Image

I also noticed that access to resources works for a while after restarting the Pangolin Docker Compose stack (down & up) before the problems reappear. However, I couldn't find anything in the logs that pointed to the cause of the problems. It seems that this is the case when no service/resource is called for a longer period of time.

Komodo is just one example, all other resources are also affected.
I use Pocket ID as an IDP, but access still does not work via the local Pangolin user in the event of an error.

When the error occurs, I am redirected to the Pangolin login page. The login appears to be successful, but I am then redirected back to the login page. (No error message in the UI, entries in the log as shown above).

Since I can see the Pangolin page, I don't expect there to be a problem with Crowdsec.

Unfortunately, I have no idea what the cause could be, but I am happy to provide any information that might help identify the cause.

Docker Compose 

services:
    pangolin:
        image: fosrl/pangolin:1.15.4 # https://github.com/fosrl/pangolin/releases
        container_name: pangolin
        restart: always
        volumes:
            - ./config:/app/config
        healthcheck:
            test: ["CMD", "curl", "-f", "http://localhost:3001/api/v1/"]
            interval: "3s"
            timeout: "3s"
            retries: 15

    gerbil:
        image: fosrl/gerbil:1.3.0 # https://github.com/fosrl/gerbil/releases
        container_name: gerbil
        restart: always
        depends_on:
            pangolin:
                condition: service_healthy
        command:
            - --reachableAt=http://gerbil:3003
            - --generateAndSaveKeyTo=/var/config/key
            - --remoteConfig=http://pangolin:3001/api/v1/gerbil/get-config
            - --reportBandwidthTo=http://pangolin:3001/api/v1/gerbil/receive-bandwidth
        volumes:
            - ./config/:/var/config
        cap_add:
            - NET_ADMIN
            - SYS_MODULE
        ports:
            - 51820:51820/udp # WireGuard port
            # - 21820:21820/udp # Client connection port
            - 443:443 # Port for traefik because of the network_mode
            - 80:80 # Port for traefik because of the network_mode

    traefik:
        image: traefik:v3.6.8 # https://hub.docker.com/_/traefik
        container_name: traefik
        restart: always
        network_mode: service:gerbil # Ports appear on the gerbil service
        depends_on:
            pangolin:
                condition: service_healthy
        command:
            - --configFile=/etc/traefik/traefik_config.yml
        volumes:
            - ./config/traefik:/etc/traefik:ro # Volume to store the Traefik configuration
            - ./config/letsencrypt:/letsencrypt # Volume to store the Let's Encrypt certificates
            - ./config/traefik/logs:/var/log/traefik # Volume to store Traefik logs
        env_file:
            - .env

    error-pages:
        image: ghcr.io/tarampampam/error-pages:3.8.0 # https://github.com/tarampampam/error-pages/releases
        restart: always
        environment:
            - TEMPLATE_NAME=connection

    geoipupdate:
        container_name: geoipupdate
        image: ghcr.io/maxmind/geoipupdate
        restart: always
        env_file:
            - .env
        volumes:
            - "./config/GeoLite2:/usr/share/GeoIP"

    crowdsec:
        command: -t
        container_name: crowdsec
        environment:
            COLLECTIONS: crowdsecurity/traefik crowdsecurity/appsec-virtual-patching crowdsecurity/appsec-generic-rules crowdsecurity/linux crowdsecurity/iptables
            ENROLL_INSTANCE_NAME: pangolin-crowdsec
            ENROLL_TAGS: docker
            GID: "1000"
            PARSERS: crowdsecurity/whitelists
        healthcheck:
            interval: 10s
            retries: 3
            start_period: 30s
            test:
                - CMD
                - cscli
                - lapi
                - status
            timeout: 5s
        image: docker.io/crowdsecurity/crowdsec:latest
        labels:
            - traefik.enable=false
        # ports:
        #     - 6060:6060
        restart: always
        volumes:
            - ./config/crowdsec:/etc/crowdsec
            - ./config/crowdsec/db:/var/lib/crowdsec/data
            - ./config/traefik/logs:/var/log/traefik
            - /var/log/journal:/var/log/host:ro

    crowdsec-web-ui:
        image: ghcr.io/theduffman85/crowdsec-web-ui:latest
        container_name: crowdsec_web_ui
        ports:
        - "100.90.80.137:3000:3000"
        environment:
        - CROWDSEC_URL=http://crowdsec:8080
        - CROWDSEC_USER=crowdsec-web-ui
        - CROWDSEC_PASSWORD=<password>
        # Optional: Lookback period for alerts/stats (default: 168h/7d)
        - CROWDSEC_LOOKBACK_PERIOD=5d
        # Optional: Backend auto-refresh interval. Values: 0 (Off), 5s, 30s (default), 1m, 5m
        - CROWDSEC_REFRESH_INTERVAL=30s
        # Optional: Idle Mode settings to save resources
        # Interval to use when no users are active (default: 5m)
        - CROWDSEC_IDLE_REFRESH_INTERVAL=5m
        # Time without API requests to consider system idle (default: 2m)
        - CROWDSEC_IDLE_THRESHOLD=2m
        # Optional: Interval for full cache refresh (default: 5m)
        # Forces a complete data reload when active, skipped when idle.
        - CROWDSEC_FULL_REFRESH_INTERVAL=5m
        volumes:
        - ./crowdsec-ui-data:/app/data
        restart: always

networks:
    default:
        driver: bridge
        enable_ipv6: true
        name: pangolin

Resource Configuration 

public-resources:

[...]

    komodo:
        name: Komodo
        protocol: http
        full-domain: komodo.example.com
        ssl: true
        targets:
            - site: pangolin
              hostname: 100.90.80.137
              method: http
              port: 8080
              healthcheck:
                  hostname: 100.90.80.137
                  port: 8080
        auth:
            sso-enabled: true
            auto-login-idp: 1
        rules:
            - action: allow
              match: path
              value: /listener/*
            - action: pass
              match: country
              value: DE
            - action: deny
              match: country
              value: ALL

Environment

  • OS Type & Version: docker compose
  • Pangolin Version: 1.15.4
  • Gerbil Version: 1.3.0
  • Traefik Version: 3.6.8
  • Newt Version: 1.9.0
  • Olm Version: n/a

To Reproduce

Not sure to be honest.

I think if it were a general problem, I wouldn't be the first to notice it. Generally speaking, I believe the problem must have come with one of the latest releases, otherwise I would have noticed it sooner. Could it be related to a particular version of Traefik?

Expected Behavior

Reliable access to all resources

Originally created by @elcajon on GitHub (Feb 18, 2026). Original GitHub issue: https://github.com/fosrl/pangolin/issues/2501 ### Describe the Bug When accessing my public resources, I noticed that some of them are not available. I noticed that I get the following error messages in the logs when accessing a page (regardless of whether the access works or not). I suspect that a successful access is delivered from the local browser cache and bypasses authentication. (wild guess) ``` pangolin | 2026-02-18T11:02:19+00:00 [info]: Resource access not allowed. Resource ID: 16. IP: 2a02:xxx. pangolin | 2026-02-18T11:02:19+00:00 [info]: Resource access not allowed. Resource ID: 16. IP: 2a02:xxx. pangolin | 2026-02-18T11:02:19+00:00 [info]: Resource access not allowed. Resource ID: 16. IP: 2a02:xxx. pangolin | 2026-02-18T11:02:20+00:00 [info]: Resource access not allowed. Resource ID: 16. IP: 2a02:xxx. pangolin | 2026-02-18T11:02:20+00:00 [info]: Resource access not allowed. Resource ID: 16. IP: 2a02:xxx. pangolin | 2026-02-18T11:02:20+00:00 [info]: Resource access not allowed. Resource ID: 16. IP: 2a02:xxx. pangolin | 2026-02-18T11:02:20+00:00 [info]: Resource access not allowed. Resource ID: 16. IP: 2a02:xxx. ``` Accessing the Pangolin UI (which is also randomly available) there are the following related access log entries: <img width="1490" height="189" alt="Image" src="https://github.com/user-attachments/assets/6020e024-c7e8-4d2a-8928-a4b70468deaa" /> I also noticed that access to resources works for a while after restarting the Pangolin Docker Compose stack (down & up) before the problems reappear. However, I couldn't find anything in the logs that pointed to the cause of the problems. It seems that this is the case when no service/resource is called for a longer period of time. Komodo is just one example, all other resources are also affected. I use Pocket ID as an IDP, but access still does not work via the local Pangolin user in the event of an error. When the error occurs, I am redirected to the Pangolin login page. The login appears to be successful, but I am then redirected back to the login page. (No error message in the UI, entries in the log as shown above). Since I can see the Pangolin page, I don't expect there to be a problem with Crowdsec. Unfortunately, I have no idea what the cause could be, but I am happy to provide any information that might help identify the cause. <details><summary>Docker Compose</summary> <p> ```yaml services: pangolin: image: fosrl/pangolin:1.15.4 # https://github.com/fosrl/pangolin/releases container_name: pangolin restart: always volumes: - ./config:/app/config healthcheck: test: ["CMD", "curl", "-f", "http://localhost:3001/api/v1/"] interval: "3s" timeout: "3s" retries: 15 gerbil: image: fosrl/gerbil:1.3.0 # https://github.com/fosrl/gerbil/releases container_name: gerbil restart: always depends_on: pangolin: condition: service_healthy command: - --reachableAt=http://gerbil:3003 - --generateAndSaveKeyTo=/var/config/key - --remoteConfig=http://pangolin:3001/api/v1/gerbil/get-config - --reportBandwidthTo=http://pangolin:3001/api/v1/gerbil/receive-bandwidth volumes: - ./config/:/var/config cap_add: - NET_ADMIN - SYS_MODULE ports: - 51820:51820/udp # WireGuard port # - 21820:21820/udp # Client connection port - 443:443 # Port for traefik because of the network_mode - 80:80 # Port for traefik because of the network_mode traefik: image: traefik:v3.6.8 # https://hub.docker.com/_/traefik container_name: traefik restart: always network_mode: service:gerbil # Ports appear on the gerbil service depends_on: pangolin: condition: service_healthy command: - --configFile=/etc/traefik/traefik_config.yml volumes: - ./config/traefik:/etc/traefik:ro # Volume to store the Traefik configuration - ./config/letsencrypt:/letsencrypt # Volume to store the Let's Encrypt certificates - ./config/traefik/logs:/var/log/traefik # Volume to store Traefik logs env_file: - .env error-pages: image: ghcr.io/tarampampam/error-pages:3.8.0 # https://github.com/tarampampam/error-pages/releases restart: always environment: - TEMPLATE_NAME=connection geoipupdate: container_name: geoipupdate image: ghcr.io/maxmind/geoipupdate restart: always env_file: - .env volumes: - "./config/GeoLite2:/usr/share/GeoIP" crowdsec: command: -t container_name: crowdsec environment: COLLECTIONS: crowdsecurity/traefik crowdsecurity/appsec-virtual-patching crowdsecurity/appsec-generic-rules crowdsecurity/linux crowdsecurity/iptables ENROLL_INSTANCE_NAME: pangolin-crowdsec ENROLL_TAGS: docker GID: "1000" PARSERS: crowdsecurity/whitelists healthcheck: interval: 10s retries: 3 start_period: 30s test: - CMD - cscli - lapi - status timeout: 5s image: docker.io/crowdsecurity/crowdsec:latest labels: - traefik.enable=false # ports: # - 6060:6060 restart: always volumes: - ./config/crowdsec:/etc/crowdsec - ./config/crowdsec/db:/var/lib/crowdsec/data - ./config/traefik/logs:/var/log/traefik - /var/log/journal:/var/log/host:ro crowdsec-web-ui: image: ghcr.io/theduffman85/crowdsec-web-ui:latest container_name: crowdsec_web_ui ports: - "100.90.80.137:3000:3000" environment: - CROWDSEC_URL=http://crowdsec:8080 - CROWDSEC_USER=crowdsec-web-ui - CROWDSEC_PASSWORD=<password> # Optional: Lookback period for alerts/stats (default: 168h/7d) - CROWDSEC_LOOKBACK_PERIOD=5d # Optional: Backend auto-refresh interval. Values: 0 (Off), 5s, 30s (default), 1m, 5m - CROWDSEC_REFRESH_INTERVAL=30s # Optional: Idle Mode settings to save resources # Interval to use when no users are active (default: 5m) - CROWDSEC_IDLE_REFRESH_INTERVAL=5m # Time without API requests to consider system idle (default: 2m) - CROWDSEC_IDLE_THRESHOLD=2m # Optional: Interval for full cache refresh (default: 5m) # Forces a complete data reload when active, skipped when idle. - CROWDSEC_FULL_REFRESH_INTERVAL=5m volumes: - ./crowdsec-ui-data:/app/data restart: always networks: default: driver: bridge enable_ipv6: true name: pangolin ``` </p> </details> <details><summary>Resource Configuration</summary> <p> ```yaml public-resources: [...] komodo: name: Komodo protocol: http full-domain: komodo.example.com ssl: true targets: - site: pangolin hostname: 100.90.80.137 method: http port: 8080 healthcheck: hostname: 100.90.80.137 port: 8080 auth: sso-enabled: true auto-login-idp: 1 rules: - action: allow match: path value: /listener/* - action: pass match: country value: DE - action: deny match: country value: ALL ``` </p> </details> ### Environment - OS Type & Version: docker compose - Pangolin Version: 1.15.4 - Gerbil Version: 1.3.0 - Traefik Version: 3.6.8 - Newt Version: 1.9.0 - Olm Version: n/a ### To Reproduce Not sure to be honest. I think if it were a general problem, I wouldn't be the first to notice it. Generally speaking, I believe the problem must have come with one of the latest releases, otherwise I would have noticed it sooner. Could it be related to a particular version of Traefik? ### Expected Behavior Reliable access to all resources
GiteaMirror added the needs investigating label 2026-04-16 09:12:49 -05:00
GiteaMirror commented 2026-04-16 09:12:50 -05:00
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@kebel87 commented on GitHub (Feb 18, 2026):

I have the same issue, specifically with Komodo but also withh more services (Ansible). Something in the pipeline seems to have changed, dunno whether it's related to Pangolin, Komodo or PocketId.

<!-- gh-comment-id:3921321009 --> @kebel87 commented on GitHub (Feb 18, 2026): I have the same issue, specifically with Komodo but also withh more services (Ansible). Something in the pipeline seems to have changed, dunno whether it's related to Pangolin, Komodo or PocketId.
GiteaMirror commented 2026-04-16 09:12:51 -05:00
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@marcschaeferger commented on GitHub (Mar 1, 2026):

I can confirm that this issue also exists in Pangolin 1.16.2 but with a bit different effects at least for me, as i can access the ressources.

Environment

  • OS Type & Version: Alpine 3.23.3 (Docker Compose)
  • Pangolin Version: 1.16.2
  • Gerbil Version: 1.3.0
  • Traefik Version: 3.6.9
  • Newt Version: 1.10.1
  • Olm Version: n/a

Additional Observations

  • I tested authentication using the same browser session where I am already logged into the Pangolin Dashboard/UI.

  • I also tested using a different browser.

  • In both cases:

    • The login form appears.
    • Authentication appears to be successful.
    • I am redirected to the resource.
    • However, in the logs I see both failed login and successful login entries.

  • All requests originate from the same static public IPv4 address (company-owned). And it can only be me doing the requests.

When the issue occurs:

  • I get redirected to the Pangolin login page.
  • Login appears successful.
  • No visible error message in the UI.
  • Logs contain Resource access not allowed entries.

This affects multiple resources, not just a single one.

I’ve attached a screenshot of the log behavior as well.

Image
<!-- gh-comment-id:3979730328 --> @marcschaeferger commented on GitHub (Mar 1, 2026): I can confirm that this issue also exists in **Pangolin 1.16.2** but with a bit different effects at least for me, as i can access the ressources. ### Environment * OS Type & Version: Alpine 3.23.3 (Docker Compose) * Pangolin Version: 1.16.2 * Gerbil Version: 1.3.0 * Traefik Version: 3.6.9 * Newt Version: 1.10.1 * Olm Version: n/a ### Additional Observations * I tested authentication using the **same browser session** where I am already logged into the Pangolin Dashboard/UI. * I also tested using a **different browser**. * In both cases: * The login form appears. * Authentication appears to be successful. * I am redirected to the resource. * However, in the logs I see both **failed login** and **successful login** entries. * All requests originate from the **same static public IPv4 address (company-owned)**. And it can only be me doing the requests. When the issue occurs: * I get redirected to the Pangolin login page. * Login appears successful. * No visible error message in the UI. * Logs contain `Resource access not allowed` entries. This affects multiple resources, not just a single one. I’ve attached a screenshot of the log behavior as well. <img width="1520" height="833" alt="Image" src="https://github.com/user-attachments/assets/a31c7b30-59bd-4db4-af29-d82e3b582e8e" />
GiteaMirror commented 2026-04-16 09:12:51 -05:00
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@pierreminik commented on GitHub (Mar 5, 2026):

I'm seeing this issue as well and it seems to be an issue with newly created rules after upgrading Pangolin to one of the newer versions. Uncertain which specific version introduced this issue as I have not created new rules for every version.

In my case, I have public resources which are protected but have a "Bypass auth" rule for my home IP. This simple rule works for public resources created in earlier versions of Pangolin. Even though my home IP is shown correctly in the Request Logs of the Pangolin dashboard I can see a "No Valid Auth" reason for a Denied action to this request.

The error logs for the docker compose stack matches those posted above, ie.: pangolin | 2026-03-05T12:47:00+00:00 [info]: Resource access not allowed. Resource ID: 16. IP: XX.XX.XX.XX..

Rules which have not changes since some of the last few releases still work, ie. the rules created in earlier versions with the very same "Bypass auth" rule for my home IP, is shown in the Request Logs of the Pangolin dashboard as "Allowed by Rule".

<!-- gh-comment-id:4004897493 --> @pierreminik commented on GitHub (Mar 5, 2026): I'm seeing this issue as well and it seems to be an issue with newly created rules after upgrading Pangolin to one of the newer versions. Uncertain which specific version introduced this issue as I have not created new rules for every version. In my case, I have public resources which are protected but have a "Bypass auth" rule for my home IP. This simple rule works for public resources created in earlier versions of Pangolin. Even though my home IP is shown correctly in the Request Logs of the Pangolin dashboard I can see a "No Valid Auth" reason for a Denied action to this request. The error logs for the docker compose stack matches those posted above, ie.: `pangolin | 2026-03-05T12:47:00+00:00 [info]: Resource access not allowed. Resource ID: 16. IP: XX.XX.XX.XX.`. Rules which have not changes since some of the last few releases still work, ie. the rules created in earlier versions with the very same "Bypass auth" rule for my home IP, is shown in the Request Logs of the Pangolin dashboard as "Allowed by Rule".
GiteaMirror commented 2026-04-16 09:12:51 -05:00
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@github-actions[bot] commented on GitHub (Mar 20, 2026):

This issue has been automatically marked as stale due to 14 days of inactivity. It will be closed in 14 days if no further activity occurs.

<!-- gh-comment-id:4094610782 --> @github-actions[bot] commented on GitHub (Mar 20, 2026): This issue has been automatically marked as stale due to 14 days of inactivity. It will be closed in 14 days if no further activity occurs.
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Reference: github-starred/pangolin#2175