[SOLVED] server not working anymore with local network... please, please HELP!

jpollard · 07-12-2014, 01:18 PM

Quote:

Originally Posted by masavini

network topology is VERY simple:

a wireless modem router (linksys x2000 - 192.168.1.1) connected to the server (lan cable - 192.168.1.4).
several laptops and mobiles (yes, 192,168.1.129 is a nokia mobile) connected with wifi.

router can ping laptop (192.168.1.3) with no issue.

i tried what dorian33 suggested:

Code:

laptop:/tmp $ arping 192.168.1.4 -I wlan0
ARPING 192.168.1.4 from 192.168.1.3 wlan0
^CSent 53 probes (53 broadcast(s))
Received 0 response(s)
laptop:/tmp $ arp -n
Address                  HWtype  HWaddress           Flags Mask            Iface
192.168.1.1              ether   98:fc:11:cf:d4:79   C                     wlan0
192.168.1.4                      (incomplete)

Code:

server:/tmp $ arping 192.168.1.3 -I eth1 
ARPING 192.168.1.3 from 192.168.1.4 eth1
Unicast reply from 192.168.1.3 [C4:85:08:96:94:98]  20.534ms
^CSent 24 probes (1 broadcast(s))
Received 1 response(s)

And unless the wireless router can be configured to bridge you cannot ping anything connected to the wireless, and nothing using the wireless can ping anything on the other side - though you might read internet sites due to the wireless performing a NAT service, and passing on to another NAT router.

This is NOT a "simple network". It actually looks like:

Code:

            internet
               |
              router1 (has to provide NAT service)
               |
   +-----------+-----------+ (192.168.1.x)
   |                       |
   server              wireless router (has to provide NAT service, or be a bridge and not a router)
                           |
                           | (also 192.168.1.x)
                          laptop

Thus connections from the laptop to the server will fail, as will connections from the server to the laptop.

dorian33 · 07-12-2014, 01:23 PM

so I understand that:
- all devices which communicates via cable are connected to the "yellow" sockets
- laptop is using WiFi
- there is connection between:
a) server and router (cable link)
b) latpop and router (radio link)
- there is no connection between server and laptop
- both server and laptop are in the same network class

for me the only one thing should be checked: are wifi module and ethernet switch at linksys bridged?

since I see that "cabled" devices cannot communicate with "radio" devices

btw: are able ping from laptop any other wireles device?

or (I suspect) the server is connected to the WAN port...

masavini · 07-12-2014, 02:37 PM

can you believe it?
i just rebooted the router, and everything works fine, now...

i lost (and made you lose) a lot of time in debugging, and the issue was related to that f*****g router...

thanks so much for your support, i promise i will never post anything before rebooting the router...