Archer 2600v Problem with TFTP ALG

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Archer 2600v Problem with TFTP ALG

This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.
Archer 2600v Problem with TFTP ALG
Archer 2600v Problem with TFTP ALG
2019-11-10 10:17:29
Model: Archer A2300  
Hardware Version: V1
Firmware Version: 170628

Hello,

 

I have succesfully used the 2600v (please note, that it is not in the drop-down list, so I needed to choose 2300, which is not right) router with Deutsche Telekom DSL connection with IPTV for three years already. Now DT changed the Media Receiver to a new 401 model. It uses TFTP to boot, and this does not work. I have used Wireshark to capture the connection, the results are as follows:

1. MR401 sends request to server (62.155.251.136), port 69

2. Receives DOUBLE (?) option acknowledgement, one from port 33898, one from port 33899.

3. Sends also double packet 0 acknowledgement to both ports.

4. In a second, server repeats option acknowledgements. That shows, that it have not received packet 0 acknowledgement.

I have tried to show the Media Receiver in net as DMZ, that did not help. I also tried to make this TFTP dowload from a WIndows computer in my network, with the same result: seems that server does not receive ACK.

I have no idea what should I tune to make it work. TFTP ALG is on on the router.

 

Regards,

Dmitry

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5 Reply
Re:Archer 2600v Problem with TFTP ALG
2019-11-11 09:02:46

@DmitryR 

 

What is the current network diagram of the Archer VR2600v? And what is the led status of it? 

 

Have you ever configured it with the username and password given by ISP?

 

Please login to the web UI and show us a screenshot of the status page. 

 

Looking forward to your reply. 

 

 

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#2
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Re:Archer 2600v Problem with TFTP ALG
2019-11-11 17:06:12

@Kevin_Z 

 

Diagram is attached, all LEDs are on and not blinking.

It is of course configured. Without ISP's credentials it obviously will not see Internet. Aber everything works fine but the MR401.

Status will be attachen is subsequent messages, interface does not allow to insert more than one file in a message.

 

Regards,

Dmitry

File:
tplink_diagram.jpgDownload
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#3
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Re:Archer 2600v Problem with TFTP ALG
2019-11-11 17:06:36
File:
tplink_status1.jpgDownload
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Re:Archer 2600v Problem with TFTP ALG
2019-11-11 17:06:58
File:
tplink_status2.jpgDownload
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#5
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Re:Archer 2600v Problem with TFTP ALG
2019-11-17 13:35:54

@Kevin_Z 

 

Seems that TFTP ALG does not work at all. I have tried different combinations of TFTP ALG, Full-Cone NAT and SPI Firewall. SPI Firewall does not matter. But when the Full-cone NAT is on, then TPFT ALG option does nothing: TFTP acknoledgement packets run is in on or off. But TFTP data packets still do not reach network behind the router.

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