Networking – Can’t access ip 0.0.0.0

ipnetworkingpython

I am am coding Python (Flask) on Windows 8. To expose a web-app to outside, I have in the past set host=0.0.0.0

Since I have a upgraded and/or installed Hyper-V with Internet access, I am unable to connect to Flask web app using

http://0.0.0.0:5000.

I have tried shutting down Windows Firewall to no avail.

This is the error:

This webpage is not available
The webpage at http://0.0.0.0:5000/ might be temporarily down or it may have moved permanently to a new web address.
Error 108 (net::ERR_ADDRESS_INVALID): Unknown error.

I also find it curious that I although the app is running at 0.0.0.0, I CAN get to it via localhost/127.0.0.1.

How can I open/enable access to 0.0.0.0?

>route print
===========================================================================
Interface List
 40...c8 60 00 cb fc 55 ......Hyper-V Virtual Ethernet Adapter #2
 18...94 db c9 8a c1 c5 ......Bluetooth Device (Personal Area Network)
 15...96 db c9 ac 27 c1 ......Microsoft Wi-Fi Direct Virtual Adapter
 14...94 db c9 ac 27 c1 ......Broadcom 802.11n Network Adapter
 12...c8 60 00 cc 03 5e ......Intel(R) 82579V Gigabit Network Connection
  1...........................Software Loopback Interface 1
===========================================================================

IPv4 Route Table
===========================================================================
Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
          0.0.0.0          0.0.0.0      192.168.1.1    192.168.1.143     20
        127.0.0.0        255.0.0.0         On-link         127.0.0.1    306
        127.0.0.1  255.255.255.255         On-link         127.0.0.1    306
  127.255.255.255  255.255.255.255         On-link         127.0.0.1    306
      192.168.1.0    255.255.255.0         On-link     192.168.1.143    276
    192.168.1.143  255.255.255.255         On-link     192.168.1.143    276
    192.168.1.255  255.255.255.255         On-link     192.168.1.143    276
        224.0.0.0        240.0.0.0         On-link         127.0.0.1    306
        224.0.0.0        240.0.0.0         On-link     192.168.1.143    276
  255.255.255.255  255.255.255.255         On-link         127.0.0.1    306
  255.255.255.255  255.255.255.255         On-link     192.168.1.143    276
===========================================================================
Persistent Routes:
  None

IPv6 Route Table
===========================================================================
Active Routes:
 If Metric Network Destination      Gateway
  1    306 ::1/128                  On-link
  1    306 ff00::/8                 On-link
===========================================================================
Persistent Routes:
  None

Best Answer

I also find it curious that I although the app is running at 0.0.0.0,
I CAN get to it via localhost/127.0.0.1.

That is because the app is not running at 0.0.0.0
0.0.0.0 is just a notation used for 'all IPs, from whereever`.

If the app is running on your own desktop then you can access it via:

  • Local host, IP v4 (aka 127.0.0.1)
  • Local host, IP v6 (aka ::1).
  • The IP on your NIC( in your case: 192.168.1.143 ), assuming you set those to allowed. This is usually done by setting allowed to 0.0.0.0. (aka allow from anywhere).