NAT issue pertaining to speed

[cornelius81]

My specs:

CTC Union modem/router (model ATU-R210)
Airport Base Station
Macbook Intel with 10.4.1
Costa Rican ISP (ICE)
Software: Transmission (however not other software works any better)

I have been reading up on how to open my ports to speed up my download/uploads and it seems to always come back to having NAT enabled on my modem. The main problem with this is whenever I enable NAT my connection speed slows to a snails space.

The configuration for the modem that my ISP set up (you can only use one of their approved modems and they will not provide them) disables DCHP and I think gives me a static IP address. The setup doesn't work at it's default settings but have to be manually configured. (I have all of this info if it would help.)

Is there a reason that NAT is slowing me down so much? Any thoughts on curing this issue?

My bandwith is 846.1 kbps, but the download speeds I'm getting is about 18Kb/s.

All help is greatly appreciated. And please bear with me as I'm still getting confused even after trying to school myself on these issues for over a week.

[Krell]

Network Address Translation = gives you a new subnet, 192.168.1.XXX

This is now your internal IP address, and your router can provide you with some firewall capabilities. You CAN have a static internal IP address on most routers, but this will depend on your particular model #.

Any time you set up NAT, you will need to Port Forward the proper ports for your applications.

1) know the app your using and which ports to forward - http://portforward.com/

2) read the manual for the ATU-R210 - http://www.ctcu.com.tw/download/atur210_man.pdf

http://www.ctcu.com.tw/component/opt...emid,37/id,64/


.

[cornelius81]

Krell,

Thanks for the info. I've been to portforward.com plenty (unfortunately they don't have my modem or its interface listed) and I've read the manual.

But I can't enable NAT if it's going to slow my overall use down as much as it has. Is there a reason that I'm getting slowed down when I enable NAT?

[Krell]

Yes, because you need some way to connect the dots in the NAT.

External IP and routing <-------> Internal IP and routing.

Unless you properly forward ports, the packet faeries cant jump the great devide.

No port forward means no request forward, and no downloady.

Read pages 34 - 39 again. If that doesnt click, find some kid at the mall and pay him $10.

.

[cornelius81]

Just to make sure I'm understanding, and because I'm an idiot on this issue.

This isn't a matter of just slow dwnld speeds, but taking 45 seconds to open an email in gmail. Does this seem normal?

[Krell]

Call your isp and ask them for some assistance. If this is what they provide you, they support it, call them every day from now on.

This is not normal behavior, but again it may be due to something not discussed in this thread, such as an OS firewall, which filters certain types of traffic, or incorrect settings affecting the dns on the router.

It could also be due to you trying to use P2P while you surf the internet with the improperly configured settings.

.

[cornelius81]

My ISP won't talk to me because they're a monopoly. So my choices are nill and the idea of service goes straight out the window.

I've had the OS firewall off while trying all of this.

It's possible I could have some settings in the modem slightly off, but since it seems to be a rare modem with minimal information online coupled with the ISP issue, I haven't been able to check it.

[cornelius81]

I'm going to post my configuration setup in separate posts.

[cornelius81]

[cornelius81]

[cornelius81]

[cornelius81]

[cornelius81]

[cornelius81]

[cornelius81]