Cannot ping to any local machine, wired and wireless

lestb · 2013-10-13 15:56:56

Hello.

Both my laptop and desktop computer can't ping to each other. When I tried the arping command from my desktop to my laptop, only one response is received. The same thing happen the other way around. I tried to look at the router configuration settings if there is a separation of wired and wireless but I didn't find any.

Any help?

ifconfig

laptop:

wlp2s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.3  netmask 255.255.255.0  broadcast 192.168.1.255
        inet6 fe80::26fd:52ff:fee9:c058  prefixlen 64  scopeid 0x20<link>
        ether 24:fd:52:e9:c0:58  txqueuelen 1000  (Ethernet)
        RX packets 101461  bytes 81617899 (77.8 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 124486  bytes 20850289 (19.8 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

desktop computer:

enp2s5: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.2  netmask 255.255.255.0  broadcast 192.168.1.255
        inet6 fe80::219:21ff:fe23:c447  prefixlen 64  scopeid 0x20<link>
        ether 00:19:21:23:c4:47  txqueuelen 1000  (Ethernet)
        RX packets 318  bytes 22864 (22.3 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 1401  bytes 120964 (118.1 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

ewaller · 2013-10-13 16:54:53

Let me try to piece this all together. You have a laptop, which is running Linux and uses a Wireless Network to talk to your wireless router.
You have a desktop, which is running Linux and uses a Wired Network to talk to the same router.

Both are on the same subnet.
I assume that both machines can connect to the Internet.
Can both (either) machine ping the router / gateway?
What make/model is the router? Is it running stock firmware?

Some routers have the ability to block computers on the LAN from seeing each other (not just wireless/wired, but any route between LAN devices)
Can you ping between two wired connections?
Can you ping between two wireless connections?

Also, as a sanity check, what is the output of ip route on each of your machines?

lestb · 2013-10-13 17:26:59

The model is FireHome AN5506-04 and I don't know if it is running stock firmware because the device is provided by my ISP.

I don't have any extra ethernet cable so I can't test whether I can ping through wired connection but I am able to ping when using wireless connection. I am also able to ping both the router and the gateway.

ip route
Laptop:

default via 192.168.1.1 dev wlp2s0  metric 303 
192.168.1.0/24 dev wlp2s0  proto kernel  scope link  src 192.168.1.3 
192.168.1.0/24 dev wlp2s0  proto kernel  scope link  src 192.168.1.3  metric 303 
192.168.1.3 via 127.0.0.1 dev lo  metric 303

Desktop PC:

default via 192.168.1.1 dev enp2s5 metric 202 
192.168.1.0/24 dev enp2s5  proto kernel  scope link  src 192.168.1.2 
192.168.1.0/24 dev enp2s5  proto kernel  scope link  src 192.168.1.2  metric 202 
192.168.1.2 via 127.0.0.1 dev lo  metric 202

ewaller · 2013-10-13 17:43:27

I hate to say it, but I fear it is a router problem -- and I know nothing of that router.

FiberHome or FireHome? Regardless, if it is what i think it is, I am jealous of you and your fiber-optic link .

Are these screen shots from your router config? http://screenshots.portforward.com/rout … 506_04_F2/

lestb · 2013-10-13 17:50:16

Sorry it is FiberHome. I just recently change my broadband because the previous one is really slow. The connection is good for me.

And yeah, those are my router's config screen shots.

ewaller · 2013-10-13 18:25:37

I don't see anything interesting in those screens either. You might poke around the LAN or Security tabs. You might see if there is a firmware upgrade available as well.

Regardless of 'Ping', can you see open ports on machines? It might be that the router drops ARP requests, but will still route. For example, have you tries to ssh from one box to the other?

cris9288 · 2013-10-13 18:35:13

I had kind of a similar situation with my router (Actiontec a1000c provided by Centurylink). Wireless devices would often just not be able to ping each other, as if for some reason they would disappear from each others arp table randomly. After some poking around, I stumbled across a setting called Wireless Multimedia Priority something-or-other where the router allocated certain connected devices higher router priority and resources based on the amount of bandwidth they were trying to use. I found this a little dumb since I just need my router to route and not micromanage bandwidth allocation. So anyways, after turning this off, my problems went away and I've been pretty happy.

Your router may or may not have this setting, and if it does it'll probably go by a different name. I would just look for settings that look suspicious or needless and turn them off.

lestb · 2013-10-14 06:43:01

Ok so I tried connecting my laptop using wired connection and it doesn't connect to the Internet. Pinging my deskop PC produces an error 'Destination Host Unreachable'. The same thing happens when pinging my laptop. Though sometimes ping just hangs. It weird that on my desktop PC I can connect to the Internet...

Last edited by lestb (2013-10-14 06:53:14)

Arch Linux

#1 2013-10-13 15:56:56

Cannot ping to any local machine, wired and wireless

#2 2013-10-13 16:54:53

Re: Cannot ping to any local machine, wired and wireless

#3 2013-10-13 17:26:59

Re: Cannot ping to any local machine, wired and wireless

#4 2013-10-13 17:43:27

Re: Cannot ping to any local machine, wired and wireless

#5 2013-10-13 17:50:16

Re: Cannot ping to any local machine, wired and wireless

#6 2013-10-13 18:25:37

Re: Cannot ping to any local machine, wired and wireless

#7 2013-10-13 18:35:13

Re: Cannot ping to any local machine, wired and wireless

#8 2013-10-14 06:43:01

Re: Cannot ping to any local machine, wired and wireless

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