wifi works, but doesn't respond to ping

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Quirken
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Posts: 26
Joined: Sat Nov 13, 2010 8:42 am

wifi works, but doesn't respond to ping

Post by Quirken »

I have a TP-Link TL-WN722N USB wifi adapter (Atheros AR9271 chipset, using the ath9k_htc driver). I'm connected to the internet and can ping other machines on the network, but this machine won't respond to incoming connections (ping says unreachable, can't connect Synergy, etc)

It's basically acting like it's behind a NAT, but it's on the right subnet.

I previously was using the internal PCI card (BCM4360), and had zero issues then. (I am now passing this through to a VM, so it's no longer available.)

Any idea why my computer seems to be isolating itself on the network?

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➜  ~ inxi -Fx
System:    Host: chaos Kernel: 4.13.0-37-generic x86_64 (64 bit gcc: 5.4.0) Desktop: Cinnamon 3.6.7 (Gtk 3.18.9)
           Distro: Linux Mint 18.3 Sylvia
Machine:   Mobo: Gigabyte model: Z97X-UD5H v: x.x Bios: American Megatrends v: F10 date: 08/03/2015
CPU:       Quad core Intel Core i5-4690K (-MCP-) cache: 6144 KB
           flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) bmips: 28001
           clock speeds: max: 3900 MHz 1: 3500 MHz 2: 3500 MHz 3: 3500 MHz 4: 3500 MHz
Graphics:  Card-1: Intel Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller bus-ID: 00:02.0
           Card-2: NVIDIA GK104 [GeForce GTX 770] bus-ID: 01:00.0
           Display Server: X.Org 1.18.4 driver: intel Resolution: 1920x1200@59.95hz
           GLX Renderer: Mesa DRI Intel Haswell Desktop GLX Version: 3.0 Mesa 17.2.8 Direct Rendering: Yes
Audio:     Card-1 Intel Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller
           driver: snd_hda_intel bus-ID: 00:03.0
           Card-2 Intel 9 Series Family HD Audio Controller driver: snd_hda_intel bus-ID: 00:1b.0
           Card-3 NVIDIA GK104 HDMI Audio Controller driver: vfio-pci bus-ID: 01:00.1
           Sound: Advanced Linux Sound Architecture v: k4.13.0-37-generic
Network:   Card-1: Intel Ethernet Connection I217-V driver: e1000e v: 3.2.6-k port: f080 bus-ID: 00:19.0
           IF: eno1 state: down mac: 74:d4:35:e9:16:25
           Card-2: Broadcom BCM4360 802.11ac Wireless Network Adapter driver: bcma-pci-bridge bus-ID: 06:00.0
           IF: N/A state: N/A mac: N/A
           Card-3: Atheros AR9271 802.11n driver: ath9k_htc usb-ID: 003-010
           IF: wlxb0487a8eaff7 state: N/A mac: N/A
Drives:    HDD Total Size: 3620.8GB (1.0% used) ID-1: /dev/sda model: SAMSUNG_HD403LJ size: 400.1GB
           ID-2: /dev/sdb model: SAMSUNG_HD403LJ size: 400.1GB ID-3: /dev/sdc model: WDC_WD3200KS size: 320.1GB
           ID-4: /dev/sdd model: ST2000DX001 size: 2000.4GB ID-5: /dev/sde model: CT500MX500SSD1 size: 500.1GB
Partition: ID-1: / size: 99G used: 18G (19%) fs: ext4 dev: /dev/sde4
           ID-2: swap-1 size: 17.02GB used: 0.25GB (1%) fs: swap dev: /dev/sde5
RAID:      No RAID devices: /proc/mdstat, md_mod kernel module present
Sensors:   System Temperatures: cpu: 29.8C mobo: 27.8C
           Fan Speeds (in rpm): cpu: N/A
Info:      Processes: 238 Uptime: 3 min Memory: 15047.7/15948.2MB Init: systemd runlevel: 5 Gcc sys: 5.4.0
           Client: Shell (zsh 5.1.1) inxi: 2.2.35

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➜  ~ ifconfig
eno1      Link encap:Ethernet  HWaddr 74:d4:35:e9:16:25  
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
          Interrupt:20 Memory:f7d00000-f7d20000 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:358 errors:0 dropped:0 overruns:0 frame:0
          TX packets:358 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:33067 (33.0 KB)  TX bytes:33067 (33.0 KB)

wlxb0487a8eaff7 Link encap:Ethernet  HWaddr b0:48:7a:8e:af:f7  
          inet addr:192.168.1.4  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::cb9:8b81:b854:5cc0/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:5484 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4702 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:6373518 (6.3 MB)  TX bytes:521028 (521.0 KB)

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➜  ~ iwconfig
eno1      no wireless extensions.

lo        no wireless extensions.

wlxb0487a8eaff7  IEEE 802.11  ESSID:"HorkiNet"  
          Mode:Managed  Frequency:2.452 GHz  Access Point: 10:C3:7B:A2:DE:20   
          Bit Rate=72.2 Mb/s   Tx-Power=20 dBm   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=42/70  Signal level=-68 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:24   Missed beacon:0
Last edited by LockBot on Wed Dec 28, 2022 7:16 am, edited 1 time in total.
Reason: Topic automatically closed 6 months after creation. New replies are no longer allowed.
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tovian
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Posts: 630
Joined: Sun Nov 22, 2015 1:17 pm
Location: Heart of Dixie

Re: wifi works, but doesn't respond to ping

Post by tovian »

You can tell a Windows firewall not to respond to a ping. That's probably a feature of other firewalls as well.

Just a thought.
“I think that this situation absolutely requires a really futile and stupid gesture be done on somebody's part"
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Quirken
Level 1
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Posts: 26
Joined: Sat Nov 13, 2010 8:42 am

Re: wifi works, but doesn't respond to ping

Post by Quirken »

it's not just ping though. the linux mint machine won't respond to anything I've tried.

additionally, the firewall is off and i've tried

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echo "0" > /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts
although in the grand scheme of things, I don't really care about ping. I just need it reachable, ping or not.
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