When an error regarding network connection occurs in Zoom App

If you get an error message like the one below, it may be related to the network connection, network firewall settings, or web security gateway settings.

  • Application remains in “Connecting” mode
  • “Network error, please try again”
  • If you’ve timed out due to “Unable to connect to the service. Please check your network connection and try again later”

Check1:
Open a browser, check the network connection, and confirm that you can access https://zoom.us . 
Recommend 1
from SSL inspection of web security gateway, Zoom.Us and  * .zoom.us the
it is recommended that you registered in the white list. 

Refer to the table below to configure the network firewall. 

protocol port sender destination
TCP 80, 443 All Zoom clients * .zoom.us
TCP 443, 8801, 8802 All Zoom clients IPv4: 3.80.20.128/25 
3.104.34.128/25 
3.120.121.0/25 
3.208.72.0/25 
3.211.241.0/25 
4.34.125.128/25 
4.35.64.128/25 
8.5.128.0/23 
13.52.6.128/25 
13.52.146.0 / 25 
18.205.93.128/25 
50.239.202.0/23 
50.239.204.0/24 
52.61.100.128/25 
52.202.62.192/26 
52.215.168.0/25 
64.69.74.0/24 
64.125.62.0/24 
64.211.144.0/24 
65.39.152.0 / 24 
69.174.57.0/24 
69.174.108.0/22 
99.79.20.0/25 
103.122.166.0/23 
109.94.160.0/24 
115.110.154.192/26 
115.114.56.192/26 
115.114.115.0/26 
115.114.131.0/26 
120.29.148.0 /twenty four
160.1.56.128/25 
161.199.136.0/22 
162.12.232.0/22 
162.255.36.0/22 
192.204.12.0/22 
202.177.207.128/27 
202.177.213.96/27 
204.141.28.0/22 
207.226.132.0/24 
209.9.211.0/24 
209.9.215.0/24 
210.57.55.0/24 
213.19.144.0/24 
213.19.153.0/24 
213.244.140.0/24 
221.122.88.64/27 
221.122.88.128/25 
221.122.89.128/25
IPv6: 
2620: 123: 2000 :: / 44
UDP 3478, 3479, 8801-8810 All Zoom clients IPv4: 3.80.20.128/25 
3.104.34.128/25 
3.120.121.0/25 
3.208.72.0/25 
3.211.241.0/25 
4.34.125.128/25 
4.35.64.128/25 
8.5.128.0/23 
13.52.6.128/25 
13.52.146.0 / 25 
18.205.93.128/25 
50.239.202.0/23 
50.239.204.0/24 
52.61.100.128/25 
52.202.62.192/26 
52.215.168.0/25 
64.69.74.0/24 
64.125.62.0/24 
64.211.144.0/24 
65.39.152.0 / 24 
69.174.57.0/24 
69.174.108.0/22 
99.79.20.0/25 
103.122.166.0/23 
109.94.160.0/24 
115.110.154.192/26 
115.114.56.192/26 
115.114.115.0/26 
115.114.131.0/26 
120.29.148.0 /twenty four
160.1.56.128/25 
161.199.136.0/22 
162.12.232.0/22 
162.255.36.0/22 
192.204.12.0/22 
202.177.207.128/27 
202.177.213.96/27 
204.141.28.0/22 
207.226.132.0/24 
209.9.211.0/24 
209.9.215.0/24 
210.57.55.0/24 
213.19.144.0/24 
213.19.153.0/24 
213.244.140.0/24 
221.122.88.64/27 
221.122.88.128/25 
221.122.89.128/25
IPv6: 
2620: 123: 2000 :: / 44

Connection type: Zoom website

protocol port sender destination
TCP 80, 443 All Zoom clients * .zoom.us 
* .cloudfront.net

 Available web browsers are Google Chrome, Safari, Firefox, Microsoft Edge, and Internet Explorer. Please refer to Internet Explorer for the requirements of each browser .

Proxy server

Zoom supports https / SSL proxy servers via port 443.

Zoom automatically detects proxy settings.

In some cases, you may be prompted to enter a proxy username / password.

See the Zoom homepage for the latest information.

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