# 404 or infinite loop when trying to append prefix to URL **URL:** \ **Category:** Traefik v2\ **Tags:** docker\ **Created:** [March 11, 2024, 9:44am UTC](https://community.traefik.io/t/404-or-infinite-loop-when-trying-to-append-prefix-to-url/21817 "2024-03-11T09:44:24Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![lateparty](https://sea2.discourse-cdn.com/flex020/user_avatar/community.traefik.io/lateparty/32/8377_2.png) [@lateparty](https://community.traefik.io/u/lateparty)\ **Post date:** [March 11, 2024, 9:44am UTC](https://community.traefik.io/t/404-or-infinite-loop-when-trying-to-append-prefix-to-url/21817/1 "2024-03-11T09:44:24Z")
Hello, So I've had a fair bit of playing around with traefik and starting to get my head around things but attempting to troubleshoot this with GPT-4 and Claude 3 kept me going in circles. I am currently running Proxmox and while I can get Traefik to reverse proxy me to the Web GUI just fine, I want the redirect to be [prox.mydomain.com/?mobile=0](http://prox.mydomain.com/?mobile=0) not just [prox.mydomain.com](http://prox.mydomain.com). All attempts at trying to get this to happen have been fraught. In another environment where I'm using nginx I do the same thing for my Synology DSM re-route and it looks like this: ```auto server { listen 80; listen [::]:80; listen 443 ssl http2; listen [::]:443 ssl http2; server_name dsm.myotherdomain.com; return 301 https://syno.myotherdomain.com/?forceDesktop=1; } ``` For Traefik I have tried pathPrefix (just got a 404) and I tried a variety of middleware regex and path appends suggested by the LLMs but they all resulted in weird infinite loops where the url would come out to be [prox.mydomain.com?/mobile=0?mobile=0?mobile=0?mobile=0?mobile=0?mobile=0?mobile=0](http://prox.mydomain.com?/mobile=0?mobile=0?mobile=0?mobile=0?mobile=0?mobile=0?mobile=0) repeated. Here are my relevant configs from my dynamic.toml. Any help or suggestions would be greatly appreciated as this works so easily in nginx ☹ ```auto # Proxmox [http.routers.proxmox-service] rule = "Host(`prox.mydomain.com`,`proxmox.mydomain.com`)" service = "proxmox-service" entryPoints = ["websecure"] [http.routers.proxmox-service.tls] certresolver = "myresolver" domains = [ { main = "*.domain.com" } ] # HTTP->HTTPS [http.routers.http-catchall] rule = "HostRegexp(`{any:.*}`)" entryPoints = ["web"] middlewares = ["redirect-https"] service = "noop" # Proxmox service pointing to your server's IP and port [http.services.proxmox-service.loadBalancer] serversTransport = "insecureskipverify" [[http.services.proxmox-service.loadBalancer.servers]] url = "https://192.168.32.2:8006" # noop service [http.services.noop.loadBalancer] [[http.services.noop.loadBalancer.servers]] url = "http://192.168.0.0" [http.serversTransports] [http.serversTransports.insecureskipverify] insecureSkipVerify = true [http.middlewares] # HTTP->HTTPS [http.middlewares.redirect-https.redirectScheme] scheme = "https" ``` Editing to include the suggestions from the LLMs - This was repeated when I asked can't Traefik do a simple 301 redirect like nginx? And they gave me this suggestion: ```auto #Add this middlewares to http.routers middlewares = ["prox-redirect-with-query"] # Middleware to redirect to the desired URL with ?mobile=0 [http.middlewares.prox-redirect-with-query.redirectregex] regex = "^https?://(prox|proxmox)\\.mydomain\\.com(.*)" replacement = "https://${1}.mydomain.com/?mobile=0${2}" permanent = true ``` And again when I try that I get the infinite appending of ?mobile=0 to the end of the url after the / ---
**Author:** ![bluepuma77](https://avatars.discourse-cdn.com/v4/letter/b/a9adbd/32.png) [@bluepuma77](https://community.traefik.io/u/bluepuma77)\ **Post date:** [March 11, 2024, 10:07am UTC](https://community.traefik.io/t/404-or-infinite-loop-when-trying-to-append-prefix-to-url/21817/2 "2024-03-11T10:07:04Z")
What do you want to achieve? When do you want the redirect (to attach a query parameter?), when not? ---
**Author:** ![lateparty](https://sea2.discourse-cdn.com/flex020/user_avatar/community.traefik.io/lateparty/32/8377_2.png) [@lateparty](https://community.traefik.io/u/lateparty)\ **Post date:** [March 11, 2024, 10:28am UTC](https://community.traefik.io/t/404-or-infinite-loop-when-trying-to-append-prefix-to-url/21817/3 "2024-03-11T10:28:00Z")
Any time I enter the URL. It effectively acts as a persistent bookmark. I always want to have ?mobile=0 included in the path. ---
**Author:** ![bluepuma77](https://avatars.discourse-cdn.com/v4/letter/b/a9adbd/32.png) [@bluepuma77](https://community.traefik.io/u/bluepuma77)\ **Post date:** [March 11, 2024, 12:17pm UTC](https://community.traefik.io/t/404-or-infinite-loop-when-trying-to-append-prefix-to-url/21817/4 "2024-03-11T12:17:23Z")
What do you mean by that? You call the URL and always add the query parameter? What if the GUI itself has a link with a query parameter? You would still add it? ---
**Author:** ![lateparty](https://sea2.discourse-cdn.com/flex020/user_avatar/community.traefik.io/lateparty/32/8377_2.png) [@lateparty](https://community.traefik.io/u/lateparty)\ **Post date:** [March 11, 2024, 12:32pm UTC](https://community.traefik.io/t/404-or-infinite-loop-when-trying-to-append-prefix-to-url/21817/5 "2024-03-11T12:32:54Z")
Based on the logic of the application there is no known way to trigger that parameter through regular use. It is a flag that can be added by the user to force web GUI and not the crippled and effectively useless mobile GUI. ---
**Author:** ![bluepuma77](https://avatars.discourse-cdn.com/v4/letter/b/a9adbd/32.png) [@bluepuma77](https://community.traefik.io/u/bluepuma77)\ **Post date:** [March 11, 2024, 2:54pm UTC](https://community.traefik.io/t/404-or-infinite-loop-when-trying-to-append-prefix-to-url/21817/6 "2024-03-11T14:54:21Z")
Can you supply a simple mapping? ```auto example.com -> example.com?m=1 example.com/abc -> example.com/abc?m=1 example.com?b=2 -> example.com?b=2&m=1 ``` And you want a redirect sent back to the client or change the forward request to the target service?