Hi All, How can I connect to an SFTP server from NetSuite using N/sftp if the SFTP server has a firewall that requires specific IP addresses to be allowed? What steps can I take to resolve this issue and establish the connection?

You educate the owner of the SFTP server & tell them that IP address whitelisting was a thing in the 1990s

Is using a reverse proxy with a static IP to connect to an SFTP server a good approach?

I would suggest to use DNS instead. Any firewall should be able to cope with DNS instead of the IP. And the reason is that the NetSuite IP addresses (both inbound and outbound) are dynamic and can be changed. Here is a link for more info:https://docs.oracle.com/en/cloud/saas/netsuite/ns-online-help/section_N251955.html#subsect_157062775551

However if you prefer to use IP's, please try these: https://docs.oracle.com/en/cloud/saas/netsuite/ns-online-help/section_162859452018.html

Are these specific to NetSuite Connector?