Need a Managed Switch to filter out SIP/ALG

A client has a VOIP phone system, and a Comcast gateway. On the gateway, one cannot turn off  SIP/ALG, which makes the VOIP  calls inconsistent.  They have an unmanaged switch now that cannot be programmed to remove the SIP/ALG disturbance.  What I need to a 24 port gigabit switch that can be programmed to remove this SIP/ALG  setting and produce VLANS to segment the phone and other traffic.

I'm wondering budget-wise whether the Netgear JGS524E would allow me to turn off SIP/ALG as well as create the necessary VLANS.  If not, can you recommend one?
Mark LitinOwnerAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

masnrockCommented:
If I remember right, none of the Comcast gateways let you disable SIP ALG. Given how SIP ALG works, you're going to have to have a router or firewall that supports disabling it. I would recommend for you to purchase and install a firewall (i.e. a Sonicwall) at the client site, get static IP addresses from Comcast, and program one of them into the firewall that you've set up.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Mark LitinOwnerAuthor Commented:
Hi, and thanks for your insight.

The client has a newer router (an ASUS) that can be employed with which I can disable SIP ALG.  I can avoid double natting if I turn off DHCP on the Comcast side.  Does that sound like a decent plan?
0
masnrockCommented:
If you don't have static IP addresses from Comcast, then you're stuck doing double NAT to try to accomplish what you'd like. And of course, if you disable NAT and all of that goodness on the ASUS, you're not going to get to test disabling SIP ALG.

If you have static address, NAT from the Comcast gateway is a non issue because your ASUS would have a static public address.
0
Determine the Perfect Price for Your IT Services

Do you wonder if your IT business is truly profitable or if you should raise your prices? Learn how to calculate your overhead burden with our free interactive tool and use it to determine the right price for your IT services. Download your free eBook now!

nociSoftware EngineerCommented:
A switch will never filter IP traffic. so that will hardly help you.
VLANS can be done on the switch, but you first need a router to split the traffic to the right VLANs
0
Mark LitinOwnerAuthor Commented:
Thanks for your insights, masnrock and noci.

The client has a static IP, so I'll direct the router to that and block SIP ILG at that level.

We'll look into VLANs if still needed after the prior step.

Thanks.
0
nociSoftware EngineerCommented:
For VLAN's you will need managed switch btw.
0
Mark LitinOwnerAuthor Commented:
Yup.  Thanks.
0
Mark LitinOwnerAuthor Commented:
Directing the router to use the static IP ignoring the Comcast gateway did the trick in letting the phones be used without the prior static.
I will be setting up a VLN to isolate the phones from the rest of the traffic.

Thanks.
0
Mark LitinOwnerAuthor Commented:
Thanks to all for the solution.  Directing the router to the static IP from the ISP worked perfectly.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Switches / Hubs

From novice to tech pro — start learning today.