Adsl Internet Access

[a-ippolito]

I am using 1751 serie router with 1-Adsl WIC to connect to the ISP for the internet access.

Wan IP is dynamic.

My router act as dhcp server for my local net and nat is implemented.

Question: how can I allow the router to forward IP protocols from/to the local net?

Attached the actual router config:

Thanks in advance.

Antonino antonino.ippolito@hp.com

[Georg Pauwen]

Hello Antonio,

with your current configuration, there is no restriction on the protocols being forwarded. What exactly are you running into ?

Regards,

GP

[a-ippolito]

Hello GP

thanks for your fast replay.

My problem is how to forward protocols different from UDP. The command to do this:"ip forward-protocol {udp [port] | nd | sdns}" , seems do not allow other different protocols. How I can forward for instance, TCP [port] ?

I have also a dubt in how to implement Dynamic DNS from my local net. Can you suggest me some useful docs ?

Thanks in advance.

Have a good time.

Ciao

Antonino

[Georg Pauwen]

Hello Antonino,

the ´ip forward-protocol udp´ is used to forward UDP broadcasts that would otherwise be dropped by the router. Which TCP broadcasts are you trying to get forwarded ?

Regarding the DDNS, check the links below, they might render some useful information. Basically, DDNS maps a DNS name to a dynamic IP address that you get assigned from your provider by means of DHCP.

DYNU Dynamic DNS Service

http://www.dynu.com/

No-IP.com

http://www.no-ip.com/

Regards,

GP

[a-ippolito]

Hi GP

I have implemented DynamicDNS from my local host and it seems to work fine , it can be accessed from the internet using the FQ domain name, I used the dyndns.org service. But I still have a problem, probably I need to change the phylosophy in my configuration: I need to have a static nat translation for the local pc. I'm getting a dynamic public IP from the ISP , this can be easily overtaked by putting the interface reference instead of its IP address:

ip nat inside source static 169.254.x.y interface dialer0

but how can I have a static relationship for the dhcp (169.254.x.y) assigned local IP addresses ? (of course the most simple probably can be assign a static IP addr. to each local client, but I prefer to have some different think, if that can be configurable).

Thanks in advance.

Ciao

Antonino