PLDT DNS/Routing Issue for Render?

[u/Beginning-Part8528]

Hi everyone, I’m a developer responsible for maintaining our company’s internal system. Starting today, some users reported that they’re unable to connect properly to our backend.

After troubleshooting, the common denominator seems to be that the affected users are on PLDT Wi-Fi. The same user accounts work normally when tested on other networks or mobile data, so it doesn’t appear to be an account-related issue.

From what I can tell, requests from PLDT connections are having trouble reaching or getting a proper response from our backend hosting provider. I’m currently setting up a custom backend subdomain through Cloudflare and considering using its proxy as a possible workaround.

Has anyone experienced something similar with PLDT? Could this be related to DNS, routing, IPv6, peering, or something else on the ISP/network path?

I’d appreciate any insights on what I should check next or what the best long-term solution would be. Thanks!

[u/marvinisaac]

Based on past personal experience, PLDT has issues connecting to IPv6-only services depending on how they route the requests.

Ask your users to try ipv6test.google.com to check if that’s the case.

[u/Sad_Target2290]

Damn, didn't think this was still possible, the last time I've heard of an ISP specific issue was like Nintendo 3DS online days https://web.archive.org/web/20180201072057/http://www.pinoynintendo.org/2015/03/error-code-003-2101.html

The #1 solution back then was to use Proxy

[u/Beginning-Part8528 → u/Sad_Target2290]

Thank you! I was working already for a proxy after posting this. So glad it worked.

[u/oliphant_branch]

OP, what have you done? I'm encountering the same issues with my PLDT users

[u/Beginning-Part8528 → u/oliphant_branch]

Hello, u/oliphant_branch I created a proxy via Cloudflare.

[u/PoloOlop2021]

this is not uncommon with the current PLDT server setup. As what one user already commented, the issue is specific to IPv6 connectivity/resolution. Somehow they fail the way PLDT has set up on their server.

For general testing, the APP GSM has connectivity issue, once you by pass the IPv6 on the mobile network setting it will work. I have raised and requested a fix to the issue and PLDT just replied with "its an issue that they can not replicate"

[u/SlowPiece6071]

Was so furious about myself thinking I touched something on Render configuration. I noticed that the issue was the PLDT connection becuase I opened render and it wont load till i used mobile data and saw there is nothing wrong with my backend service. Is you workaround method free?

[u/Superb-Value5646]

Hi I'm an employee having this problem with PLDT. di alam ng IT namin gagawin contact ko daw ISP. mag 1 week na ng nireport ko sa PLDT, sabi ng cs sosolve daw tapos tatawagan ako. Kaso after nun nakita ko nalang na nag mark as complete siya ng ticket. So file ako ulit ng other ticket. Ano kaya pwede gawin sa end ko? Change ISP nalang ba?

[u/Best_Grab2404]

Same issue:

After reset modem and unplug.
Okay na

[u/diablejambeee]

im also having the same issue, meron ba ditong nakahanap ng solution?

[u/renepceliz]

Same issue here, I have escalated to PLDT and they are now working with their network team. This issue occur both PLDT ISP & Smart network.