Computers within network can't connect to each other

[EightySix Four]

I have 5 computers on a network in my home, whenever one tries to connect to another, no matter the method (FTP, RDP, SMB etc) they refuse to do it, but you can connect to all of them just fine from outside the network.

What is odd about this, is that they all worked fine just a few days ago. Nothing has been changed as far as I know, and the computers involved are Windows, Mac, and Linux boxes.


I'm at a complete loss.

Edit: when trying to ping other computers on the network it tells me "No route to host, the host is down"

Edit 2: they see each other in the network map, but are completely unable to connect.

Edit 3: when they do connect it's a mere bytes per second.

 

[Slowlearner]

Need More Info - your setup seems complicated - connect outside of Network? Are the devices assigned public IPs?
How are they connected? Router? switch? - Fixed local IPs or Dynamic?

 

[EightySix Four]

Alright, network is all controlled by a xincom dual wan router. The router is connected to 2 different wireless access points set-up as one big network to cover my house and the connected offices. There is another switch in the house to connect the server closet.

The server has an FTP, RDP, and HTTP server on it.

The xincom router uses dynamic dns to stay up no matter which WAN is operating in case either one goes down. By connecting from outside the network (at my college) I have a great connection to the RDP and around ~180kbps on the FTP.

Inside the network none of my shares work at all. When I connect to the FTP server I get around 100bps (yes, bytes) and no RDP at all. I have a Buffalo terabye NAS on the network which no machine can connect to either.

When pinging other computers in the network I get no route found.

When I connect to the ftp using its internal IP it doesn't work, if I connect through the DNS (*****.dnsalias.com) it works at 100bps.

Thanks,
Nick

 

[EightySix Four]

Just realized this began after the two macs updated to 10.5.2

 

[Slowlearner]

1. You need to assign fixed IPs to all your pcs and the Buffalo NAS (this one has to have a fixed IP)
2. Turn off DHCP on the router and make sure the access points are set up as APs (i.e. they are not handing out IPs as well)
3. Configure your Xircom router to port forward specifically HTTP/FTP etc to the server << you will need its manual

If you have already done all this, and still have problems, specially the low speeds, I would re-examine the configuration of the Xircom router very carefully - step by step - and test each step.

 

[EightySix Four]

That's exactly how the network has been set-up. I think I'll have to reset that router and just do it over again.Hopefully it'll fix the issue.


I've had quite a few issues with this router, can anyone recommend a better dual-wan router with VPN support? (and not the linksys one, I was not a fan)

 

[Slowlearner]

I have been using a Linksys RV042 dual wan router for the last 9 months without issues.

 

[EightySix Four]

I had the RV082 and seemed to have a lot of connections dropping etc. Odd...

Maybe I'll go back and give it a shot.