@Idhaya Well, this happens when the FW is not suitable for your device for some reason (I supose you used the extracted .bin file in the procedure). The last resort would be to contact the ISP who...

@Sai340 I believe the problem is with your egress bandwidth minimum values that you're trying to set - try with bigger values. There's a thread which describes this error message - here.

@Idhaya As already has been mentioned, this router model is distributed by the ISPs. Here's a newer FW release for this router model. Keep in mind that if you upgrade the router FW, you may no longer...

@h-maulwurf As you already guessed the problem is caused by the Archer C6 NAT - details. Use this guide - Case 2 to configure Archer C6 in AP mode without changing its operation mode and check if you...

@Bigboobselephan This change should only affect the domain name resolution but not the router SPI Firewall - go through this story for more details.

@Feb There are more suitable device for that purpose like Archer C54 (with RE mode) or Archer C64 (with WDS) - both cheaper than VR400. You could ask your retailer to swap the VR400 for one of these,...