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srx5308 slow internet speed

nextwavepc
Guide

srx5308 slow internet speed

we have the latest firmware installed, traffic metering off. 

is this device capable of handling 150Mb/25Mb internet. we cant get over 55.

 

Model: SRX5308|PROSAFE Gigabit Quad WAN SSL & IPSEC VPN Firewall
Message 1 of 10
DaneA
NETGEAR Employee Retired

Re: srx5308 slow internet speed

Hi nextwavepc,

 

The LAN-to-WAN Throughput of the SRX5308 is 924Mbps which is greater than your subscribed speed (150Mb/25Mb) from your internet service provider (ISP) and this should be fine.  Let us isolate the problem.  Kindly answer the questions below:

 

a. Was it working fine before even before upgrading the firmware of the SRX5308?

b. If you have just upgraded to the latest firmware which is v4.3.5-3, did you perform a factory reset right after upgrading the firmware of the SRX5308?  If not yet, I suggest you to factory reset the SRX5308 then reconfigure it from scratch to start clean using the latest firmware version.

c. Is the SRX5308 set as the main router wherein the WAN IP Address is registered to it?

d. How is everything connected?  It would be best if you post a diagram of your detailed network setup. 

 

 

Regards,

 

DaneA
NETGEAR Community Team

Message 2 of 10
nextwavepc
Guide

Re: srx5308 slow internet speed

Thanks for the reponse.

it was was not working well prior to the firmware upgrade, which is why we installed the current firmware as an attempt to resolve. 

Yes, the srx5308 is the main router, with all traffic going through it.

We have a netgear switch with all connetions in it, and the switch is then connected to the srx5308 on the lan and the wan1 is connected to our isp.

 

Message 3 of 10
DaneA
NETGEAR Employee Retired

Re: srx5308 slow internet speed

@nextwavepc,

 

Just following-up on this.  Here are my follow-up questions:

 

a. If you will disconnect the SRX5308 from the modem then connect a PC directly to the modem, are you able to access the internet just fine?

b. Are there any firewall rules configured on the SRX5308?  If yes, kindly try to disable all of it and check the internet connection.

 

 

Regards,

 

DaneA
NETGEAR Community Team

Message 4 of 10
nextwavepc
Guide

Re: srx5308 slow internet speed

Hi there, 

yes if we go direct to the modem we receive full speed. and we have no firewall rules in place. We do have vpn to connect to another site. 

Message 5 of 10
DaneA
NETGEAR Employee Retired

Re: srx5308 slow internet speed

@nextwavepc,

 

Kindly try the steps below:

 

1. On the web-GUI of the SRX5308, go to Security > Firewall > Attack Checks.

2. Uncheck the boxes that says "Block TCP flood" and "Block UDP flood."

 

Note: If both boxes are already uncheck, check both boxes then click Apply.  Then, uncheck both boxes and click Apply.  

 

3. Click Apply.

4. Observe the internet connection through the SRX5308. 

 

 

Regards,

 

DaneA

NETGEAR Community Team

Message 6 of 10
nextwavepc
Guide

Re: srx5308 slow internet speed

Thanks, 

We tried that and still it is running same. Download of 55

Message 7 of 10
DaneA
NETGEAR Employee Retired

Re: srx5308 slow internet speed

@nextwavepc,

 

Let us try to lower the MTU size on the SRX5308.  Here are the steps below: 

 

1.  On the web-GUI, go to Network Configuration > WAN Settings > WAN Setup.

2.  Click Edit on the respective WAN interface you are using.  The WAN IPv4 ISP Settings screen displays.  

3.  Click the Advanced option arrow in the upper right of the screen. The WAN Advanced Options screen displays for the WAN interface that you selected.

4. On the MTU size section, select Custom in order to change the MTU size.  Refer to the MTU size table below for the appropriate MTU size:

 

 

5. Click Apply to save the changes then observe the internet connection through the SRX5308.

 

Note: You might need to reboot the SRX5308 as well then observed again the internet connection through it. 

 

As reference, kindly read pages 71-76 of the SRX5308 reference manual here on how to change the MTU size.

 

 

Regards,

 

DaneA

NETGEAR Community Team

Message 8 of 10
nextwavepc
Guide

Re: srx5308 slow internet speed

thank you, just tried all of them. still running at 55 down. 

 

Message 9 of 10
DaneA
NETGEAR Employee Retired

Re: srx5308 slow internet speed

@nextwavepc,

 

I have re-read this forum thread and it seems that we have exhausted all of the possible troubleshooting steps.  I suggest you open a chat / online case with NETGEAR Support and let them know about your concern for further assistance.  

 

 

Regards,

 

DaneA

NETGEAR Community Team

Message 10 of 10
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