Forum Discussion

Aspirant

Jun 05, 2016

Solved

wndr4500v2 dropping comcast connection

i have motorola sb6141 cable modem. when pc is directly connected to the cable modem comcast functions well. when i connect to the internet thru my wndr4500v2 router with ipv6 set to WAN/dhcp LAN//...

Advanced Features

Firmware

Troubleshooting

frankc1
Jun 11, 2016
Hi ElaineM,

I have found a solution to this problem. My firewall (Bitdefender) has a default setting to deny incoming ICMP v6 messages. Setting this to allow made the problem vanish.

What I do not understand is why direct connecting the PC to the cable modem worked OK as Bitdefender was still in the loop. Magic I guess.

I believe allowing ICMP messages poses a security risk which seems to be an IPV6 risk. Do you have a comment on this?

Thanks again :-)

ElaineM

NETGEAR Employee Retired

Jun 06, 2016

Hi frankc1

Welcome to the community!

Do you have the latest firmware installed on your router?

If you have not upgraded the firmware yet, here's the link.

After the firmware upgrade, kindly factory reset the router by pushing the reset button for 10 seconds with a use of a paperclip.

Once done, reconfigure the router to get the internet connection back and observe your connection.

frankc1

Aspirant

Jun 06, 2016

Hi, Elaine,

Firmware Version is V1.0.0.60_1.0.38

I will try the hard reset later today. BTW can I backup my configuration and restore after the hard reset without re-introducing problems?

ElaineM
NETGEAR Employee Retired
Jun 06, 2016
Yes, you may backup and restore.
- frankc1
  Aspirant
  Jun 06, 2016
  Hi ElaineM,
  
  Did a hard reset, reimported the backup and have the original results. Connects tp ipv6 for a short while then ipv6 times out.
  - ElaineM
    NETGEAR Employee Retired
    Jun 07, 2016
    One of our support team will follow-up with you for further diagnosis.
    
    They'll be contacting you separately.