Home Network Community > All Threads > PPPoE : Authentication failed, incorrect username or password, although it connects on PC
< All Threads

PPPoE : Authentication failed, incorrect username or password, although it connects on PC

This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.

PPPoE : Authentication failed, incorrect username or password, although it connects on PC

This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.
PPPoE : Authentication failed, incorrect username or password, although it connects on PC
PPPoE : Authentication failed, incorrect username or password, although it connects on PC
2020-08-09 23:08:55 - last edited 2020-08-14 01:32:59
Model: Archer C20  
Hardware Version: V5
Firmware Version: 0.9.1 4.17 v0001.0 Build 200526 Rel.70733n(5553)

I am 100% sure that the username and the password are correct. I have tried changing the cloning the MAC address to the computer I connected it to, but I still get this error. 2 days ago, after trying for an hour it connected finally, but I had to reboot the router today and it started showing the error again.

 

 

Here is the system log : 


13    1970-01-01 00:03:23    PPP    Error    ppp2
14    1970-01-01 00:03:23    PPP    Information    ppp2 rcvd [LCP TermAck id=0x5]
15    1970-01-01 00:03:23    PPP    Information    ppp2 sent [LCP TermAck id=0x4]
16    1970-01-01 00:03:23    PPP    Information    ppp2 rcvd [LCP TermReq id=0x4]
17    1970-01-01 00:03:23    PPP    Information    ppp2 sent [LCP TermReq id=0x2 "Failed to authenticate ourselves to peer"]
18    1970-01-01 00:03:23    PPP    Warning    ppp2 LCP down
19    1970-01-01 00:03:23    PPP    Error    ppp2 LCP down
20    1970-01-01 00:03:23    PPP    Error    ppp2 Failed to authenticate ourselves to peer
21    1970-01-01 00:03:23    PPP    Information    ppp2 rcvd [PAP AuthNak id=0x1 "mac validation failed: c"]
22    1970-01-01 00:03:21    PPP    Information    ppp2 sent [PAP AuthReq id=0x1 user="username" password=<hidden>]
23    1970-01-01 00:03:21    PPP    Information    ppp2 sent [LCP ConfAck id=0x3 <mru 1492> <magic 0xc76bea4c> <auth pap>]
24    1970-01-01 00:03:21    PPP    Information    ppp2 rcvd [LCP ConfReq id=0x3 <mru 1492> <magic 0xc76bea4c> <auth pap>]
25    1970-01-01 00:03:21    PPP    Information    ppp2 sent [LCP ConfRej id=0x2 <pcomp>]
26    1970-01-01 00:03:21    PPP    Information    ppp2 rcvd [LCP ConfReq id=0x2 <pcomp> <mru 1492> <magic 0xc76bea4c> <auth pap>]
27    1970-01-01 00:03:19    PPP    Information    ppp2 rcvd [LCP ConfAck id=0x1 <mru 1492> <magic 0x34dee759>]
28    1970-01-01 00:03:19    PPP    Information    ppp2 sent [LCP ConfReq id=0x1 <mru 1492> <magic 0x34dee759>]
29    1970-01-01 00:03:19    PPP    Information    ppp2 sent [PADI Host-Uniq(0x00000676)]

  0      
 
  0      
 
#1
Options
1 Accepted Solution
Re:PPPoE : Authentication failed, incorrect username or password, although it connects on PC-Solution
2020-08-10 02:56:49 - last edited 2020-08-14 01:32:59

@soitchu 

 

Hello, do you mean you have internet access when you plug the modem directly to your PC and dial-up? 

 

When did you purchase this C20? Try to test the line with another router if possible.

 

Who is your ISP? If you confirmed the username and password are correct and there are no limitations on the ISP side, but still cannot build the PPPoE connection successfully, try to reset the C20 one more time to its factory defaults and dial-up again.

 

Thanks.

Nice to Meet You in Our TP-Link Community. Check Out the Latest Posts: Connect TP-Link Archer BE550 to Germany's DS-Lite (Dual Stack Lite) Internet via WAN Archer GE550 - BE9300 Tri-Band Wi-Fi 7 Gaming Router EasyMesh Is Available When Wi-Fi Routers Work in AP Mode as A Controller. Archer AX55V2 Supports WireGuard VPN, EasyMesh Ethernet Backhaul, IoT Network, Speed Limit,and More If you found a post or response helpful, please click Helpful (arrow pointing upward icon). If you are the author of a topic, remember to mark a helpful reply as the "Recommended Solution" (star icon) so that others can benefit from it.
Recommended Solution
  0  
  0  
#2
Options
5 Reply
Re:PPPoE : Authentication failed, incorrect username or password, although it connects on PC-Solution
2020-08-10 02:56:49 - last edited 2020-08-14 01:32:59

@soitchu 

 

Hello, do you mean you have internet access when you plug the modem directly to your PC and dial-up? 

 

When did you purchase this C20? Try to test the line with another router if possible.

 

Who is your ISP? If you confirmed the username and password are correct and there are no limitations on the ISP side, but still cannot build the PPPoE connection successfully, try to reset the C20 one more time to its factory defaults and dial-up again.

 

Thanks.

Nice to Meet You in Our TP-Link Community. Check Out the Latest Posts: Connect TP-Link Archer BE550 to Germany's DS-Lite (Dual Stack Lite) Internet via WAN Archer GE550 - BE9300 Tri-Band Wi-Fi 7 Gaming Router EasyMesh Is Available When Wi-Fi Routers Work in AP Mode as A Controller. Archer AX55V2 Supports WireGuard VPN, EasyMesh Ethernet Backhaul, IoT Network, Speed Limit,and More If you found a post or response helpful, please click Helpful (arrow pointing upward icon). If you are the author of a topic, remember to mark a helpful reply as the "Recommended Solution" (star icon) so that others can benefit from it.
Recommended Solution
  0  
  0  
#2
Options
Re:PPPoE : Authentication failed, incorrect username or password, although it connects on PC
2021-05-21 10:05:08

@soitchu 

 

I am facing the same issue, PPPoE connection works fine on my PC but fails on my router. Even log shows exactly same entries that you have you mentioned. Have you got this issue fixed? 

  0  
  0  
#3
Options
Re:PPPoE : Authentication failed, incorrect username or password, although it connects on PC
2021-05-21 16:01:49

@Sujil_C 

Yes, kind of. I am not sure how these protocols work exaclty, but authenticating it on my PC first and then quickly disconnecting the wire from the PC and connecting it to the router worked for me most of the times. This seems pretty janky though. Also, the issue went away overtime and I don't need to do that anymore. What's your ISP?

  1  
  1  
#4
Options
Re:PPPoE : Authentication failed, incorrect username or password, although it connects on PC
2021-05-21 16:03:44

@Sujil_C 

 

Also check with your ISP and see if you can get a MAC address that's binded to your account. It didn't really matter in my case, but do it just to cover all bases.

  0  
  0  
#5
Options
Re:PPPoE : Authentication failed, incorrect username or password, although it connects on PC
2021-05-22 09:14:33

@soitchu 

 

Thanks for the response. I tried the same trick of authenticating from PC, but not worked. I will check with my ISP whether they can bind the router mac id.

  0  
  0  
#6
Options

Information

Helpful: 0

Views: 11993

Replies: 5

Related Articles
Authentication failed, incorrect username or password
3240 0
Cant connect to WiFi "Authentication failed, incorrect username or password"
23426 30
RE200 connecting problem (username or password incorrect).
7679 0
Authentication failing on PPPoE
1607 0
CHAP authentication failure for PPPoE : bad username/password even with right credentials
5429 0
username or password is incorrect (upon connection)
15849 0
About Us
Press
Copyright © TP-Link Systems Inc. All rights reserved.