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PPPoE cannot successful connect to ISP with custom settings

Lipfeng

2024-08-14 23:58:46 - last edited 2024-09-06 01:19:25

Posts: 6

Helpful: 1

Solutions: 1

Stories: 0

Registered: 2021-01-29

PPPoE cannot successful connect to ISP with custom settings

2024-08-14 23:58:46 - last edited 2024-09-06 01:19:25

Tags: #Network Connectivity

Model: Archer GE800

Hardware Version: V1

Firmware Version: 1.1.3 Build 20240528 rel.85215(5553)

PPPoE cannot successful connect to ISP with custom settings

After login to the configuration page, goto Advanced->Network->Internet->Advanced Settings, at "DNS Address" selection choose "Use the Followwing DNS Addresses", input custom DNSs value and click safe. After reboot, the router fail to connect to ISP and establish inter connection.

If you revert back "DNS Address" selection to "Get Dynamically from ISP" then safe and reboot. The router can connect to ISP and establish internet connection.

This behavior is weird not suppose to be like that.

1 Accepted Solution

Lipfeng

LV1

2024-09-04 12:47:43 - last edited 2024-09-06 01:19:25

Posts: 6

Helpful: 1

Solutions: 1

Stories: 0

Registered: 2021-01-29

Re:PPPoE cannot successful connect to ISP with custom settings-Solution

2024-09-04 12:47:43 - last edited 2024-09-06 01:19:25

@Joseph-TP

Confirmed ISP problem! TM Unifi start to block well known DNS (53/DoH/Dot) .

Refer below list:

Google = blocked

Cloudflare

1.1.1.1 = blocked

1.1.1.2 = blocked

Opendns

208.67.222.222 = blocked

Quad9

9.9.9.9 = blocked

Adguard

94.140.14.14 = blocked

Recommended Solution

4 Reply

Joseph-TP

2024-08-15 06:25:48

Posts: 624

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Registered: 2024-06-22

Re:PPPoE cannot successful connect to ISP with custom settings

2024-08-15 06:25:48

@Lipfeng

What DNS do you want to change? It is recommended that the WAN DNS and the router’s LAN are not in the same subnet, otherwise the router may not work properly.

Warm regards.

Lipfeng

LV1

2024-08-15 14:40:57

Posts: 6

Helpful: 1

Solutions: 1

Stories: 0

Registered: 2021-01-29

Re:PPPoE cannot successful connect to ISP with custom settings

2024-08-15 14:40:57

Joseph-TP wrote

@Lipfeng

Hi

What DNS do you want to change? It is recommended that the WAN DNS and the router’s LAN are not in the same subnet, otherwise the router may not work properly.

Warm regards.

@Joseph-TP

Thanks a lot for helping.

I want to replace with ad-guard DNS (94.140.14.14 and 94.140.15.15), there are not in the same subnet.

My router subnet is factory default setting 255.255.255.0

Joseph-TP

2024-08-16 10:33:08

Posts: 624

Helpful: 49

Solutions: 92

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Registered: 2024-06-22

Re:PPPoE cannot successful connect to ISP with custom settings

2024-08-16 10:33:08

@Lipfeng

It is recommended that you consult your internet service provider to confirm whether they have restrictions on ad-guard DNS (94.140.14.14 and 94.140.15.15).
At the same time, you could test primary DNS 8.8.8.8 and secondary DNS 8.8.4.4.

Lipfeng

LV1

2024-09-04 12:47:43 - last edited 2024-09-06 01:19:25

Posts: 6

Helpful: 1

Solutions: 1

Stories: 0

Registered: 2021-01-29

Re:PPPoE cannot successful connect to ISP with custom settings-Solution

2024-09-04 12:47:43 - last edited 2024-09-06 01:19:25

@Joseph-TP

Confirmed ISP problem! TM Unifi start to block well known DNS (53/DoH/Dot) .

Refer below list:

Google = blocked

Cloudflare

1.1.1.1 = blocked

1.1.1.2 = blocked

Opendns

208.67.222.222 = blocked

Quad9

9.9.9.9 = blocked

Adguard

94.140.14.14 = blocked

PPPoE cannot successful connect to ISP with custom settings

PPPoE cannot successful connect to ISP with custom settings

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