4 months ago
Project ID: 9a065420-da99-4f97-983e-1d174b922ca5
i'm facing issues in connecting my domain to a railway service. i'm using cloudflare DNS, configured DNS automatically by clicking the integration button
when i navigate to my domain, i get 404
the app is a fastapi webapp, of course i configured "/" path. the issue is DNS related, i don't see anything in the logs, no incoming requests to the app. if i add a "generated domain" everything works fine
37 Replies
4 months ago
What kind of 404? A Railway one?
didn't want to reach out, but wasted like 3 hours on this
not sure who's giving 404
4 months ago
Can you screenshot the page you're seeing?
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4 months ago
What happens if you open an incognito tab (ctrl + shift + n) and navigate to your site there?
4 months ago
It does seem like it for me, I navigate to https://www.smartresponding.com/ and it does load a website (something something concierge)
The remote address (per your dev tools network tab screenshot) is 62.149.128.4 which belongs to a "Aruba" IT company, and not Railway or Cloudflare
4 months ago
So it really does seem like a caching issue
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4 months ago
I also notice a "DNS Resolution: System" in the same screenshot
What happens if you refresh (preferably in an incognito tab again) after running ipconfig /flushdns in command prompt?
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4 months ago
sudo resolvectl flush-caches for Linux systemd-resolved
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4 months ago
What returns in console when you run host -t a www.smartresponding.com?
4 months ago
https://www.whatsmydns.net/#A/www.smartresponding.com also shows that everything is correctly propagated
4 months ago
And host www.smartresponding.com 1.1.1.1?
host www.smartresponding.com 1.1.1.1
Using domain server:
Name: 1.1.1.1
Address: 1.1.1.1#53
Aliases:
www.smartresponding.com has address 62.149.128.4
www.smartresponding.com is an alias for smartresponding.com.
www.smartresponding.com is an alias for smartresponding.com.
smartresponding.com mail is handled by 10 mx.smartresponding.com.
www.smartresponding.com is an alias for smartresponding.com.
; <<>> DiG 9.20.23 <<>> NS smartresponding.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 47770
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; COOKIE: 902d89f6893d38a6010000006a2c1117a6ea9bd3dfc0078f (good)
;; QUESTION SECTION:
;smartresponding.com. IN NS
;; ANSWER SECTION:
smartresponding.com. 300 IN NS lucy.ns.cloudflare.com.
smartresponding.com. 300 IN NS matt.ns.cloudflare.com.
;; Query time: 20 msec
;; SERVER: 192.168.1.254#53(192.168.1.254) (UDP)
;; WHEN: Fri Jun 12 16:00:55 CEST 2026
;; MSG SIZE rcvd: 128
before, i had also added root domain with cname @
but it wasn't working too
4 months ago
What about dig www.smartresponding.com @lucy.ns.cloudflare.com?
; <<>> DiG 9.20.23 <<>> www.smartresponding.com @lucy.ns.cloudflare.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 44749
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; COOKIE: 93771b9755fe85b1010000006a2c12b43bd4b5e969250a2e (good)
;; QUESTION SECTION:
;www.smartresponding.com. IN A
;; ANSWER SECTION:
www.smartresponding.com. 300 IN CNAME smartresponding.com.
smartresponding.com. 300 IN A 62.149.128.4
;; Query time: 47 msec
;; SERVER: 173.245.58.133#53(lucy.ns.cloudflare.com) (UDP)
;; WHEN: Fri Jun 12 16:07:48 CEST 2026
;; MSG SIZE rcvd: 110
4 months ago
dig @1.1.1.1 +https www.smartresponding.com?
; <<>> DiG 9.20.23 <<>> @1.1.1.1 +https www.smartresponding.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 48289
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
;; QUESTION SECTION:
;www.smartresponding.com. IN A
;; ANSWER SECTION:
www.smartresponding.com. 300 IN CNAME r9cqajiw.up.railway.app.
r9cqajiw.up.railway.app. 60 IN A 69.46.46.123
;; Query time: 115 msec
;; SERVER: 1.1.1.1#443(1.1.1.1) (HTTPS)
;; WHEN: Fri Jun 12 16:10:43 CEST 2026
;; MSG SIZE rcvd: 1054 months ago
It seems like your router (or possibly ISP) is intercepting your DNS queries
The last command I gave, ran the DNS query over HTTPS (secure) instead of UDP (insecure)
4 months ago
Could try restarting your router for a starter, or installing Cloudflare's http://1.1.1.1 for DNS over HTTPS
4 months ago
Oh oh, you can also enable DNS over HTTPS in your browser specifically
4 months ago
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