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Network firewall or proxy server settings for Zoom Follow

Overview

If your app stays in a "connecting" mode or has timed out due to "Network error, please try again" or "Can't connect to our service, please check your network connection and try again" issues, it could be related to your network connection, network firewall settings, or web security gateway settings.

Note: Check your network connection by opening a browser and ensure that you can access https://zoom.us

This article covers:

Zoom firewall rules

To configure your network firewall, please see the following table. The following rules should be applied to outbound traffic. Zoom will communicate to the destination port received when the client makes its connection. The firewall should be configured to allow these return connections.

Protocol Ports Source Destination
TCP 80,443 All Zoom clients *.zoom.us
TCP 443, 8801, 8802 All Zoom clients

IPv4:

3.7.35.0/25
3.21.137.128/25
3.22.11.0/24
3.23.93.0/24
3.25.41.128/25
3.25.42.0/25
3.25.49.0/24
3.80.20.128/25
3.96.19.0/24
3.101.32.128/25
3.101.52.0/25
3.104.34.128/25
3.120.121.0/25
3.127.194.128/25
3.208.72.0/25
3.211.241.0/25
3.235.69.0/25
3.235.82.0/23
3.235.71.128/25
3.235.72.128/25
3.235.73.0/25
3.235.96.0/23
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
18.157.88.0/24
18.205.93.128/25
50.239.202.0/23
50.239.204.0/24
52.61.100.128/25
52.81.151.128/25
52.81.215.0/24
52.202.62.192/26
52.215.168.0/25
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
101.36.167.0/24
103.122.166.0/23
111.33.115.0/25
111.33.181.0/25
115.110.154.192/26  
115.114.56.192/26
115.114.115.0/26 
115.114.131.0/26
120.29.148.0/24
129.151.0.0/19
129.151.40.0/22
129.151.48.0/20
129.159.0.0/20
129.159.160.0/19
129.159.208.0/20
130.61.164.0/22
134.224.0.0/16
140.238.128.0/24
140.238.232.0/22
144.195.0.0/16
147.124.96.0/19
149.137.0.0/17
152.67.20.0/24
152.67.118.0/24
152.67.152.0/21
152.67.168.0/22
152.67.180.0/24
152.67.184.0/22
152.67.240.0/21
158.101.64.0/24
158.101.184.0/22
160.1.56.128/25
161.189.199.0/25
161.199.136.0/22
162.12.232.0/22
162.255.36.0/22
165.254.88.0/23
168.138.16.0/22
168.138.48.0/24
168.138.56.0/21
168.138.72.0/24
168.138.74.0/25
168.138.80.0/21
168.138.96.0/22
168.138.116.0/22
168.138.244.0/24
170.114.0.0/16
173.231.80.0/20
192.204.12.0/22
193.122.16.0/20
193.122.32.0/20
193.122.208.0/20
193.122.224.0/20
193.122.240.0/20
193.123.0.0/19
193.123.40.0/21
193.123.176.0/20
193.123.128.0/19
193.123.168.0/21
193.123.192.0/19
198.251.128.0/17
202.177.207.128/27
204.80.104.0/21
204.141.28.0/22
207.226.132.0/24
209.9.211.0/24
209.9.215.0/24
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
221.123.139.192/27


IPv6:
2620:123:2000::/40
UDP

3478, 3479, 8801 - 8810

 All Zoom clients

IPv4:

3.7.35.0/25
3.21.137.128/25
3.22.11.0/24
3.23.93.0/24
3.25.41.128/25
3.25.42.0/25
3.25.49.0/24
3.80.20.128/25
3.96.19.0/24
3.101.32.128/25
3.101.52.0/25
3.104.34.128/25
3.120.121.0/25
3.127.194.128/25
3.208.72.0/25
3.211.241.0/25
3.235.69.0/25
3.235.82.0/23
3.235.71.128/25
3.235.72.128/25
3.235.73.0/25
3.235.96.0/23
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
18.157.88.0/24
18.205.93.128/25
50.239.202.0/23
50.239.204.0/24
52.61.100.128/25
52.81.151.128/25
52.81.215.0/24
52.202.62.192/26
52.215.168.0/25
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
101.36.167.0/24
103.122.166.0/23
111.33.115.0/25
111.33.181.0/25
115.110.154.192/26  
115.114.56.192/26
115.114.115.0/26 
115.114.131.0/26
120.29.148.0/24
129.151.0.0/19
129.151.40.0/22
129.151.48.0/20
129.159.0.0/20
129.159.160.0/19
129.159.208.0/20
130.61.164.0/22
134.224.0.0/16
140.238.128.0/24
140.238.232.0/22
144.195.0.0/16
147.124.96.0/19
149.137.0.0/17
152.67.20.0/24
152.67.118.0/24
152.67.152.0/21
152.67.168.0/22
152.67.180.0/24
152.67.184.0/22
152.67.240.0/21
158.101.64.0/24
158.101.184.0/22
160.1.56.128/25
161.189.199.0/25
161.199.136.0/22
162.12.232.0/22
162.255.36.0/22
165.254.88.0/23
168.138.16.0/22
168.138.48.0/24
168.138.56.0/21
168.138.72.0/24
168.138.74.0/25
168.138.80.0/21
168.138.96.0/22
168.138.116.0/22
168.138.244.0/24
170.114.0.0/16
173.231.80.0/20
192.204.12.0/22
193.122.16.0/20
193.122.32.0/20
193.122.208.0/20
193.122.224.0/20
193.122.240.0/20
193.123.0.0/19
193.123.40.0/21
193.123.176.0/20
193.123.128.0/19
193.123.168.0/21
193.123.192.0/19
198.251.128.0/17
202.177.207.128/27
204.80.104.0/21
204.141.28.0/22
207.226.132.0/24
209.9.211.0/24
209.9.215.0/24
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
221.123.139.192/27


IPv6:
2620:123:2000::/40

 

Firewall rules for Zoom Phone

Note:

Protocol Ports Source Destination
TCP 5091 All Zoom clients

8.5.128.0/24
64.211.144.0/24
65.39.152.0/24
69.174.57.0/24
103.122.166.0/23
120.29.148.0/24
147.124.96.0/19
149.137.0.0/17
149.137.25.0/24
149.137.41.0/24
162.12.232.0/22
173.231.92.0/24
173.231.94.0/24
192.204.12.0/22
209.9.215.0/24
213.19.144.0/24
213.19.153.0/24
213.244.140.0/24
TCP 390 (see note) All Zoom clients

3.21.137.128/25
3.235.96.0/23
UDP 20000-64000 All Zoom Clients

64.211.144.0/24
65.39.152.0/24
69.174.57.0/24
103.122.166.0/23
147.124.96.0/19
149.137.0.0/17
149.137.25.0/24
149.137.41.0/24
162.12.232.0/22
173.231.92.0/24
173.231.94.0/24
207.226.132.0/24
209.9.211.0/24
213.19.144.0/24
213.244.140.0/24

 

Firewall rules for Zoom website

Protocol Ports Source Destination
TCP 80, 443 All Zoom Clients *.zoom.us
*.cloudfront.net

 

Firewall rules for certificate validation

The Zoom client 5.5.0 or later requires whitelisting the following URLs for certificate validation.

Protocol Ports Source

Destination
HTTP 80 Zoom client ocsp.digicert.com
crl3.digicert.com
crl4.digicert.com
crl.godaddy.com
certificates.godaddy.com
crl.starfieldtech.com
certificates.starfieldtech.com
ocsp.godaddy.com
ocsp.starfieldtech.com

 

Additional IP ranges

Additional IP ranges to be allowed can also be found in the following lists:

Proxy server

We support https/SSL proxy server via port 443 for Zoom traffic.

Note: This does not apply to the Zoom Phone service. 

Zoom automatically detects your proxy settings. In some instances, you may be prompted to enter the proxy username/password.

Note: We recommend allowing zoom.us and *.zoom.us from proxy or SSL inspection. 

Firewall rules for  other Zoom services