4 ms·

Nice! A network tool I've always wanted is one that automates the investigation you have to do manually if you are experienceing "internet issues". I mean, the

Nice! A network tool I've always wanted is one that automates the investigation you have to do manually if you are experienceing "internet issues". I mean, the check list is quite straightforward but still a pretty manual process, stuff like: - Do I have the expected IP? - Is there large packet loss or latency issues hinting at connectivity issues? - Can I ping the local gateway? - Can I ping to outside network? - Is my nearest DNS responding? - Is another, remote DNS responding? - What does Downdetector or similar say about the service I'm trying? It would be nice with a one click tool that just went through this in order and gave a diagnosis.

dtaht 5y ago
It's not "one click", but flent is the goto tool we use to probe networks for a multiplicity of problems. It's available for most OSes, including OSx. See flent.org.
zimbatm 5y ago
Check out https://github.com/ycd/dstp https://github.com/ycd/dstp . It's still pretty young but it tries to solve that problem. The author needs more feedback.
artificialLimbs 5y ago
#!/bin/zsh ip addr | grep $localNetworkPrefix ping $localGateway ping 1.1.1.1 ping $DNS01 ping $DNS02 open -a Safari https://downdetector.com/status/%1 Do `chmod +x ./scriptname.sh` to make executable and run with argument (e.g. net.sh facebook) to check a particular service. Edit: Thanks @Shared404
- Shared404 5y ago
  > Edit: Not sure how to do single spaced newline here. If you prepend each line with 4 spaces it'll format as code.
  - sbr464 5y ago
    I believe only 2 spaces are required.
- X-Istence 5y ago
  ip doesn't exist on macOS. That is a Linuxism. You can use the following: netstat -rn -f inet | grep default | head -n 1 | awk '{ print $2 }' To get the default gateway that is the preferred one on macOS, so you don't need to hard code it. scutil --dns Will display the DNS servers/split DNS configuration as well.
  - mzi 5y ago
    I'm on my phone but I think you can do this if you're using awk anyway: netstat -rn -f inet | awk '/default/ {print $2;exit}'
  - mobilemidget 5y ago
    I still type 'ip a s' on osx machines multiple times a week, even though I know it doesn't exist for many years. If on wifi one can also simply option click the wifi icon in the menu bar. Maybe some people don't know yet, it was a late discovery for me option click shows more information there. For quick internet access check I like 'curl ipconfig.sh'
perryizgr8 5y ago
This is what windows network troubleshooter was meant to be. But it never seems to work.
dzhiurgis 5y ago
I have xBar plugin (formely BitBar) that pings Cloudflare: ping -c 1 -n 1.1 2>/dev/null | awk -F '/' 'END {printf "%.2f ms\n", $5}' Also your router GATEWAY=$(netstat -nr | grep '^default' | grep en0 | grep -o '[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}') ping -c 1 -n -q $GATEWAY 2>/dev/null | awk -F '/' 'END {printf "%.2f ms\n", $5}'
toast0 5y ago
Needs something about MTU too. A popular way to mess up a network is to configure it for a too large MTU and not send the ICMPs that would tell you otherwise.

dtaht 5y ago

It's not "one click", but flent is the goto tool we use to probe networks for a multiplicity of problems. It's available for most OSes, including OSx. See flent.org.

zimbatm 5y ago

Check out https://github.com/ycd/dstp https://github.com/ycd/dstp . It's still pretty young but it tries to solve that problem. The author needs more feedback.

artificialLimbs 5y ago

#!/bin/zsh ip addr | grep $localNetworkPrefix ping $localGateway ping 1.1.1.1 ping $DNS01 ping $DNS02 open -a Safari https://downdetector.com/status/%1 Do `chmod +x ./scriptname.sh` to make executable and run with argument (e.g. net.sh facebook) to check a particular service. Edit: Thanks @Shared404

Shared404 5y ago
> Edit: Not sure how to do single spaced newline here. If you prepend each line with 4 spaces it'll format as code.
- sbr464 5y ago
  I believe only 2 spaces are required.
X-Istence 5y ago
ip doesn't exist on macOS. That is a Linuxism. You can use the following: netstat -rn -f inet | grep default | head -n 1 | awk '{ print $2 }' To get the default gateway that is the preferred one on macOS, so you don't need to hard code it. scutil --dns Will display the DNS servers/split DNS configuration as well.
- mzi 5y ago
  I'm on my phone but I think you can do this if you're using awk anyway: netstat -rn -f inet | awk '/default/ {print $2;exit}'
- mobilemidget 5y ago
  I still type 'ip a s' on osx machines multiple times a week, even though I know it doesn't exist for many years. If on wifi one can also simply option click the wifi icon in the menu bar. Maybe some people don't know yet, it was a late discovery for me option click shows more information there. For quick internet access check I like 'curl ipconfig.sh'

perryizgr8 5y ago

This is what windows network troubleshooter was meant to be. But it never seems to work.

dzhiurgis 5y ago

I have xBar plugin (formely BitBar) that pings Cloudflare: ping -c 1 -n 1.1 2>/dev/null | awk -F '/' 'END {printf "%.2f ms\n", $5}' Also your router GATEWAY=$(netstat -nr | grep '^default' | grep en0 | grep -o '[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}') ping -c 1 -n -q $GATEWAY 2>/dev/null | awk -F '/' 'END {printf "%.2f ms\n", $5}'

toast0 5y ago

Needs something about MTU too. A popular way to mess up a network is to configure it for a too large MTU and not send the ICMPs that would tell you otherwise.