For the last 3 months or so I'm having random errors where I can't bind a specific port where our Identity server is running on my local development workstation. At first I thought it's my broken machine, so I reset everything, which kinda fixed the issue for 2 months and now it is back.
In the meanwhile other developers saw the same issue. All of us who experience the issue are running Windows 10, but not everyone with Windows 10 has that issue.
Restarting windows after it was shut down with shutdown /s /f /t 0 is the only reliable solution to open up the port again. After I restart normally (due to windows updates or similar) the issue comes up again an I need to shut down windows with that command.
I wrote a small f# script to test which ports are affected. The exact error message I get is
An attempt was made to access a socket in a way forbidden by its access permissions
When I looked for it, the suggested solutions where to restart the machine, but that seems more like a work around, not a real solution. I've also found https://stackoverflow.com/a/10461978/621366 - but netstat -o doesn't list the port, neither does the tool TCPView. All of us are pretty sure that the port isn't occupied by anything. I also tried running netstat in an administrator console and similar commands inside bash on windows, but couldn't find anything. I can't even connect to the port via telnet, it says nothing is listening on the port.
those ports in question are for instance:
- 49670 - 49689
- 49710 - 49749
- 49760 - 49779
- 49811 - 49830
- 49843 - 49882
- 50197 - 50216
None of us modified anything on the windows firewall or has any additional anti virus tools installed except the windows 10 default ones. So everything should be on default values. And it also worked normally for ~10 months before it broke the first time and afterwards for 2 months. In both cases after some windows updates where installed. The last time it was a bios update (probably due to the meltdown / spectre issues?).
Also trying to open up the ports explicitly on the firewall didn't help.
According to this answer https://stackoverflow.com/a/23982901/621366 TCPView and netstat shouldn't miss any occupied ports, but even when I enable showing unconnected endpoints in TCPView, I don't see any of the ports where I get permission denied when trying to bind them. Here a screen from the occupied ports (I marked the bordering occupied ports which are right before or after the group of permission-denied-ports)
UPDATE:
I've noticed that it always seems to be 160 or 180 (exact numbers) of ports which have permission denied in the ranges of 40,000+ This seems oddly coincidental to me, so obviously something is occupying the ports on purpose, but what? I can't seem to find anything in the windows event logs (although I wouldn't know what to look for exactly) and none of those ports shows up any any of my firewall rules. Also shutting down docker for windows doesn't make any difference and when a colleague mentioned that for them it's enough to restart docker for windows (in the UI go to Reset->Restart) and right now for me, even restarting with the shutdown command doesn't work anymore.
UPDATE 2:
The output of netstat -ano run from an administrator powershell:
Proto Local Address Foreign Address State PID
TCP 0.0.0.0:135 0.0.0.0:0 LISTENING 1152
TCP 0.0.0.0:445 0.0.0.0:0 LISTENING 4
TCP 0.0.0.0:2179 0.0.0.0:0 LISTENING 4696
TCP 0.0.0.0:5040 0.0.0.0:0 LISTENING 6616
TCP 0.0.0.0:5357 0.0.0.0:0 LISTENING 4
TCP 0.0.0.0:5432 0.0.0.0:0 LISTENING 11100
TCP 0.0.0.0:7680 0.0.0.0:0 LISTENING 7056
TCP 0.0.0.0:17500 0.0.0.0:0 LISTENING 9668
TCP 0.0.0.0:49664 0.0.0.0:0 LISTENING 784
TCP 0.0.0.0:49665 0.0.0.0:0 LISTENING 1628
TCP 0.0.0.0:49666 0.0.0.0:0 LISTENING 2028
TCP 0.0.0.0:49667 0.0.0.0:0 LISTENING 3560
TCP 0.0.0.0:49800 0.0.0.0:0 LISTENING 856
TCP 0.0.0.0:49821 0.0.0.0:0 LISTENING 892
TCP 0.0.0.0:50000 0.0.0.0:0 LISTENING 11100
TCP 0.0.0.0:50001 0.0.0.0:0 LISTENING 11100
TCP 0.0.0.0:51000 0.0.0.0:0 LISTENING 11100
TCP 10.0.75.1:139 0.0.0.0:0 LISTENING 4
TCP 10.0.75.1:445 10.0.75.2:44848 ESTABLISHED 4
TCP 127.0.0.1:843 0.0.0.0:0 LISTENING 9668
TCP 127.0.0.1:944 0.0.0.0:0 LISTENING 688
TCP 127.0.0.1:944 127.0.0.1:50968 TIME_WAIT 0
TCP 127.0.0.1:944 127.0.0.1:50970 TIME_WAIT 0
TCP 127.0.0.1:944 127.0.0.1:50973 TIME_WAIT 0
TCP 127.0.0.1:944 127.0.0.1:50977 TIME_WAIT 0
TCP 127.0.0.1:944 127.0.0.1:50981 TIME_WAIT 0
TCP 127.0.0.1:944 127.0.0.1:50990 TIME_WAIT 0
TCP 127.0.0.1:944 127.0.0.1:50992 TIME_WAIT 0
TCP 127.0.0.1:944 127.0.0.1:50996 TIME_WAIT 0
TCP 127.0.0.1:944 127.0.0.1:51005 TIME_WAIT 0
TCP 127.0.0.1:944 127.0.0.1:51007 TIME_WAIT 0
TCP 127.0.0.1:944 127.0.0.1:51009 TIME_WAIT 0
TCP 127.0.0.1:944 127.0.0.1:51015 TIME_WAIT 0
TCP 127.0.0.1:944 127.0.0.1:51017 ESTABLISHED 688
TCP 127.0.0.1:4380 0.0.0.0:0 LISTENING 11024
TCP 127.0.0.1:6942 0.0.0.0:0 LISTENING 9296
TCP 127.0.0.1:17600 0.0.0.0:0 LISTENING 9668
TCP 127.0.0.1:49668 127.0.0.1:49669 ESTABLISHED 688
TCP 127.0.0.1:49669 127.0.0.1:49668 ESTABLISHED 688
TCP 127.0.0.1:50076 127.0.0.1:50077 ESTABLISHED 8828
TCP 127.0.0.1:50077 127.0.0.1:50076 ESTABLISHED 8828
TCP 127.0.0.1:50173 127.0.0.1:50174 ESTABLISHED 9668
TCP 127.0.0.1:50174 127.0.0.1:50173 ESTABLISHED 9668
TCP 127.0.0.1:50175 127.0.0.1:50176 ESTABLISHED 9668
TCP 127.0.0.1:50176 127.0.0.1:50175 ESTABLISHED 9668
TCP 127.0.0.1:50197 127.0.0.1:50198 ESTABLISHED 9668
TCP 127.0.0.1:50198 127.0.0.1:50197 ESTABLISHED 9668
TCP 127.0.0.1:50335 127.0.0.1:50336 ESTABLISHED 6424
TCP 127.0.0.1:50336 127.0.0.1:50335 ESTABLISHED 6424
TCP 127.0.0.1:50346 127.0.0.1:50347 ESTABLISHED 11100
TCP 127.0.0.1:50347 127.0.0.1:50346 ESTABLISHED 11100
TCP 127.0.0.1:51011 127.0.0.1:51012 ESTABLISHED 9296
TCP 127.0.0.1:51012 127.0.0.1:51011 ESTABLISHED 9296
TCP 127.0.0.1:51013 127.0.0.1:51014 ESTABLISHED 9296
TCP 127.0.0.1:51014 127.0.0.1:51013 ESTABLISHED 9296
TCP 127.0.0.1:51016 0.0.0.0:0 LISTENING 9296
TCP 127.0.0.1:51017 127.0.0.1:944 ESTABLISHED 8828
TCP 127.0.0.1:63342 0.0.0.0:0 LISTENING 9296
TCP 127.94.0.1:946 0.0.0.0:0 LISTENING 688
TCP 127.94.0.2:946 0.0.0.0:0 LISTENING 688
TCP 127.94.0.3:946 0.0.0.0:0 LISTENING 688
TCP 127.94.0.4:946 0.0.0.0:0 LISTENING 688
TCP 169.254.105.83:139 0.0.0.0:0 LISTENING 4
TCP 192.168.0.107:139 0.0.0.0:0 LISTENING 4
TCP 192.168.0.107:49415 111.221.29.134:443 ESTABLISHED 4316
TCP 192.168.0.107:49417 111.221.29.127:443 ESTABLISHED 4316
TCP 192.168.0.107:50185 162.125.66.3:443 CLOSE_WAIT 9668
TCP 192.168.0.107:50246 52.70.31.26:443 CLOSE_WAIT 9668
TCP 192.168.0.107:50253 35.177.204.73:443 ESTABLISHED 2804
TCP 192.168.0.107:50254 35.177.204.73:443 ESTABLISHED 2804
TCP 192.168.0.107:50256 35.177.204.73:443 ESTABLISHED 2804
TCP 192.168.0.107:50257 158.85.224.175:443 ESTABLISHED 10836
TCP 192.168.0.107:50258 13.69.14.160:443 ESTABLISHED 8620
TCP 192.168.0.107:50310 66.102.1.188:443 ESTABLISHED 11184
TCP 192.168.0.107:50329 157.240.20.15:443 ESTABLISHED 10836
TCP 192.168.0.107:50331 111.221.29.74:443 ESTABLISHED 10072
TCP 192.168.0.107:50332 162.125.18.133:443 ESTABLISHED 9668
TCP 192.168.0.107:50351 40.77.226.194:443 ESTABLISHED 8620
TCP 192.168.0.107:50460 66.102.1.189:443 ESTABLISHED 10836
TCP 192.168.0.107:50470 66.102.1.189:443 ESTABLISHED 10836
TCP 192.168.0.107:50501 192.30.253.125:443 ESTABLISHED 11184
TCP 192.168.0.107:50513 40.77.226.194:443 ESTABLISHED 8620
TCP 192.168.0.107:50529 87.98.218.198:443 ESTABLISHED 12540
TCP 192.168.0.107:50530 172.217.21.46:443 ESTABLISHED 10836
TCP 192.168.0.107:50616 172.217.21.46:443 ESTABLISHED 10836
TCP 192.168.0.107:50630 162.125.18.133:443 ESTABLISHED 9668
TCP 192.168.0.107:50641 172.217.21.37:443 ESTABLISHED 10836
TCP 192.168.0.107:50645 162.125.66.4:443 CLOSE_WAIT 9668
TCP 192.168.0.107:50668 87.98.218.198:443 ESTABLISHED 12540
TCP 192.168.0.107:50703 151.101.0.133:443 ESTABLISHED 11184
TCP 192.168.0.107:50709 192.30.253.125:443 ESTABLISHED 11184
TCP 192.168.0.107:50744 87.98.218.198:443 ESTABLISHED 12540
TCP 192.168.0.107:50828 162.125.66.3:443 CLOSE_WAIT 9668
TCP 192.168.0.107:50830 151.101.0.133:443 ESTABLISHED 11184
TCP 192.168.0.107:50831 151.101.0.133:443 ESTABLISHED 11184
TCP 192.168.0.107:50832 151.101.0.133:443 ESTABLISHED 11184
TCP 192.168.0.107:50834 151.101.0.133:443 ESTABLISHED 11184
TCP 192.168.0.107:50835 151.101.0.133:443 ESTABLISHED 11184
TCP 192.168.0.107:50836 151.101.0.133:443 ESTABLISHED 11184
TCP 192.168.0.107:50837 151.101.0.133:443 ESTABLISHED 11184
TCP 192.168.0.107:50839 192.30.253.125:443 ESTABLISHED 11184
TCP 192.168.0.107:50844 151.101.0.133:443 ESTABLISHED 11184
TCP 192.168.0.107:50847 192.30.253.124:443 ESTABLISHED 11184
TCP 192.168.0.107:50857 192.30.253.124:443 ESTABLISHED 11184
TCP 192.168.0.107:50863 162.125.34.137:443 CLOSE_WAIT 9668
TCP 192.168.0.107:50865 172.217.21.46:443 TIME_WAIT 0
TCP 192.168.0.107:50866 172.217.21.46:443 ESTABLISHED 10836
TCP 192.168.0.107:50910 35.186.213.138:
