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FVS336G v2 Very slow throughput

WyoDog
Luminary

FVS336G v2 Very slow throughput

NETGEAR ProSafe™ Gigabit Dual WAN SSL VPN Firewall FVS336Gv2

Firmware Version:   4.3.3-5

Windows 10

 

Cable modem (Charter/Spectrum)

Cisco DPC3216 DOCSIS 3.0 2-PORT Voice Modem

__________________________________________

 

I began seeing DNS messages. 

DNS address could not be found.
ERR_NAME_NOT_RESOLVED
DNS_PROBE_FINISHED_NXDOMAIN

 

The error appears for a few seconds before continuing on to that URL.

I'm using network settings provided by ISP. 

 

I tried using FreeDNS and Google DNS with no improvement. 

I noticed a new firmware upgrade so I upgraded to Firmware Version 4.3.3-6. Since doing the upgrade the throughtput of the modem is less than half of what it was.

 

Wired connection to the modem shows 66+ Mbps with no DNS errors.

 

Going through the FVS336Gv2 (wired) is 24 Mbps with the old DNS errors.

 

Troubleshooting:

1) factory reset

2) back to Firmware 4.3.3-5

3) configured settings

 

Same result: throughput approx 26Mbps with DNS errors.

 

I'm stumpted. Any advice will be apprectiated.

 

thanks

Terry

 

 

Model: FVS336Gv2|PROSAFE DUAL WAN GIGABIT FIREWALL WITH SSL & IPSEC VPN
Message 1 of 8
DaneA
NETGEAR Moderator

Re: FVS336G v2 Very slow throughput

Hi @WyoDog,

 

Welcome to the community! 🙂 

 

Since you have reverted the firmware of the FVS336Gv2 back to v4.3.3-5 were you able to perform a factory reset on it, then reconfigure the settings from scratch?  It is best to perform a factory reset after upgrading or downgrading the firmware then start from scratch in order to start clean using the firmware uploaded. 

 

If ever you are always using the WAN 1 port of the FVS336Gv2, I suggest you to try using its WAN 2 port in order to isolate the problem.  Then, check if same problem will occur.

 

 

Regards,

 

DaneA

NETGEAR Community Team

Message 2 of 8
WyoDog
Luminary

Re: FVS336G v2 Very slow throughput

DaneA

I will try both and report back. I hadn't thought of either fix.

Thanks

 

Message 3 of 8
WyoDog
Luminary

Re: FVS336G v2 Very slow throughput

DaneA

I apologize for not getting right back on this thread, I have been out of town (medical).

 

No Joy! I first switched to LanB. Same result. So that eliminates that as a source. I rolled back to the previous version, from Firmware Version 4.3.3-6, did a full reset, same result. I was now at Firmware 4.3.3-5. I went back to the previous version (before 4.3.3-5), reset and same result. It appears to me that the router isn't talking well with DNS servers. I called my IPS Charter/Spectrum to verify addresses and have them reset my cable modem, which they did. I got very little else from them (other than some attitude). It's the old, 'it's not our problem, it has to be your equipment, contact your hardware support group. So here I am.

 

Terry

 

Message 4 of 8
DaneA
NETGEAR Moderator

Re: FVS336G v2 Very slow throughput

@WyoDog,

 

Thanks for the update.  Let us try this.  On the web-GUI of the FVS336Gv2, go to Security > Firewall > Attack Checks.  Make sure to uncheck the boxes that says "Block TCP flood" and Block UDP flood."  Observe if it helps.  

 

Refer to the image below as reference:

 

 

 

Regards,

 

DaneA

NETGEAR Community Team

Message 5 of 8
DaneA
NETGEAR Moderator

Re: FVS336G v2 Very slow throughput

@WyoDog,

 

Just following up on this.  Were you able to try my suggestion?  If yes, do the same problem occur? 

 

 

Regards,

 

DaneA

NETGEAR Community Team

Message 6 of 8
WyoDog
Luminary

Re: FVS336G v2 Very slow throughput

Dane

 

Both boxes were unchecked.

Message 7 of 8
DaneA
NETGEAR Moderator

Re: FVS336G v2 Very slow throughput

@WyoDog,

 

Thanks for the feedback.  It seems that we have already exhausted the troubleshooting steps and still the same problem.  With regard to this, I suggest you to open a chat or online case with NETGEAR Support and state the status of your FVS336Gv2.  If ever your FVS336Gv2 is declared faulty, you will need to submit a .doc or .pdf copy of the Proof of Purchase or Sales Invoice of the FVS336Gv2 for warranty verification.  If ever the hardware warranty is still valid, an online replacement will follow.

 

 

Regards,

 

DaneA

NETGEAR Community Team

Message 8 of 8
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