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SA 520 W Painfully slow

I recenly installed an SA 520 W for client using Verizon DSL (3 meg down). This box replaced an old Firebox firewall. Prior to the switch, download speeds were close to the advertised 3 meg. Now, with the SA 520 in place, we are receiving roughly 300kbps down with a massive ammount of latency. There have been no other changes introduced. This slowness is present even with all workstations powered off (there are 7). The firmware is up to date. Cisco support reccomends defaulting the box which I am reluctant to do as I beleive it to be a fools errand.

Any thoughts or suggestions?

Thanks!

Bob

Message was edited by: bfriend@casserlyconsulting.com

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13 REPLIES

Re: SA 520 W Painfully slow

Hi Bfriend,

Doesn't make sense, the box is infinitely more powerful compared to something like the WRVS4400N.

YES , do what Small Business Support Center suggest , factory reset and try the throughput test from your PC to something likespeedtest


Report on how it's running from a copper Ethernet connection from the SA520W to the Speed test location near you.

regards Dave

New Member

Re: SA 520 W Painfully slow

Just curious if anyone has found a solution to this? We just installed one on Friday and the client is complaining of this very situation where as either pages are timing out or browing is very slow.

Re: SA 520 W Painfully slow

What firmware are you running?  Are you running PPPoE through the SA520?

New Member

Re: SA 520 W Painfully slow

I'm not sure of the firmware ver but we are running PPPoe.

New Member

Re: SA 520 W Painfully slow

Latest firmware. I'm out of the office right now, but I believe it's 1.2.1. No PPOE.

Re: SA 520 W Painfully slow

To both of you, are you running your own DNS servers or is the SA 520 running the DNS proxy?

New Member

Re: SA 520 W Painfully slow

That would be DNS Proxy for our install.

Re: SA 520 W Painfully slow

Turn on logging...

Administration -> Logging -> Logging Facility and Severity

Turn on Debugging level for System, Kernel, Network, and Firewall.

Can you get a sniffer from Administration -> Diagnostics -> Packet Trace, do this on the WAN interface.

Use that and recreate the issue with the web pages. 

Get the sniffer and the logs and post them here please.

New Member

Re: SA 520 W Painfully slow

Event log not showing anything, however please see the attached packet capture.

Re: SA 520 W Painfully slow

Could you go to Firewall -> Attacks and uncheck the box for block fragmented packets?

New Member

Re: SA 520 W Painfully slow

As it turns out, it was the offsite backup that was killing the connection.

Re: SA 520 W Painfully slow

Good to hear.

Re: SA 520 W Painfully slow

Did this disable fragmented backs help?

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