Resources

Products

NAT IP address whitelisting for SSO

Modified on: Sat, 14 Mar, 2026 at 11:02 AM

If your organization enforces IP whitelisting for incoming authentication requests, add our public NAT IP addresses to your allowlist to ensure uninterrupted SSO login flows.

Public NAT IP Addresses:

If your organization implements IP whitelisting as a security measure for incoming authentication requests, it is essential to include our public NAT IP addresses in your allowlist. This step is crucial to ensure that Single Sign-On (SSO) login processes remain uninterrupted and function seamlessly.


Failure to add these IP addresses to your allowlist could result in SSO login failures, as the authentication requests originating from our service would be blocked. This is in case IP restriction/whitelisting is mandated by your Organization.


Please ensure that your network security team or the relevant personnel responsible for managing your firewall configurations are aware of this requirement. They will need to add the following Public NAT IP Addresses to your organization's allowlist:


SSO NAT IPs

Region

IP

EUN

18.99.96.100
18.99.96.101
18.99.96.102
16.170.3.97
13.63.163.169
51.21.98.22

ap-southeast-2

13.237.130.193

13.238.108.137

13.238.181.238
52.62.216.211
54.206.47.212
54.79.94.95

ap-south-1

13.126.228.113

13.127.236.188

13.233.78.192

13.234.254.220

65.1.183.201

me-central-1

51.112.18.242

51.112.18.242

3.28.139.238

eu-central-1

35.156.130.117

3.66.115.16

18.197.225.139

18.194.35.50

18.194.199.3

18.184.82.138

us-east-1

54.227.64.103

54.221.106.6

54.165.99.40

54.146.103.253

44.216.174.188

34.230.240.236

3.234.114.191

3.208.162.241


We recommend that you regularly check for updates to our Public NAT IP Addresses, as these may change occasionally. We will notify you of any changes, but it is also good practice to periodically review your allowlist to ensure it is up-to-date.


If you have any questions or concerns about this process, please do not hesitate to contact our support team at support@freshworks.com. We are here to assist you in ensuring a smooth and secure SSO experience.