Servers and Linksys Wireless Router

[scirocco81]

Hello all, been searching my eyes out tying to find some info, and these forums kept coming up...figured I'd go ahead and ask here!

I have a Cisco 678 DSL modem, PPP mode, NAT enabled, DHCP server disabled. What I am trying to do, is get my Sun Sparc Server 1000 viewable to the web, FTP, Telnet, HTTP. The Cisco connects to a Linksys Wireless Router. The Linksys has DHCP disabled as well, and has the Sun box in the DMZ.

Problem: Even after manually adding NAT entires to the Cisco, my outside ftp requests don't ever make it to the Sun box. Just from link light activity, it *looks* like the Cisco is forwarding the packets...but the Linksys isn't passing it on. I am not sure on this though. Snooping the interface on the Sun box shows no incoming activity on port 21. Now, I am NOT using a static IP from my ISP on the Cisco...is this my problem? I would hope there was a way around this...the Cisco seems pretty good on functionality, but I have no idea how to go about properly setting it all up. I have played and played....to no avail. Suggestions/comments welcome. I would like to avoid static IP from my ISP, as it is cheaper and easier to go with a service like

http://www.dyndns.com.

Eric

 

[TheOldMan346]

scirocco81,

I think you've actually got a couple of issues here.

First off, as I read the Cisco docs, the 678 is a DSL modem AND router. So you've got two routers in your network and that imposes an extra configuration need.

Second, you got wired and wireless which, I believe, needs to be bridged. You may have already done this but there is not enough information to tell.

Short and sweet test - try hooking the ethernet from the 678 to the Sun box and see if the FTP packets get through. My gut is that they will. I suspect that what is happening is that the 678 is NATing the public address to a private address and then the Linksys is trying to do the same thing and it is getting lost in the process.

Try that and see what happens. Then we can try to work the other issues.

The Old Man

 

[scirocco81]

Thanks for the hints, that was one of my action items (taking the linksys outta the config)...but after more playing today, I got it working. After setting a wildcard NAT on the Cisco (ALL ports forwarded to the linksys) and turning off every linksys option I could find...boom it started working. I believe it was the linksys all along...and whatever I turned off (IPsec and all those other options) finally let things through!