Troubleshooting Outbound WebDAV

Outbound WebDAV connection issues usually trace to a firewall or other restriction on the remote server that requires an IP address to be allowlisted. They can also occur when the outbound server does not actually accept WebDAV, or when the configured port, hostname, or other settings are wrong.

Check with your counterparty about any IP address restrictions or allowlisting in place. When restrictions apply, follow the instructions below carefully.

IP Addresses Used For Connection

When you have a Custom Domain installed on your site, Files.com has provisioned two dedicated IP addresses for your site and uses them by default for outbound connections to the remote server. Provide these two IP addresses to your counterparties and ask them to allowlist them in any applicable firewall.

When you do not have a Custom Domain installed on your site, you do not have dedicated IP addresses provisioned, and Files.com uses its entire pool of IP addresses for connecting outbound to the remote server. When your counterparties maintain an IP address allowlist, they need to allowlist all of the IPs on this list.

Customers often ask for dedicated IP addresses as a way to avoid having to ask their counterparty to allowlist a long list of IP addresses. Files.com offers that for Remote Server connection purposes through adding a Custom Domain to your site. The custom domain provides the justification for the dedicated IP address.

Files.com automatically provisions a pair of dedicated IP addresses for every site that has a custom domain enabled. FTP, unlike HTTP, requires that every custom domain be hosted on a dedicated IP address in order to have a custom SSL Certificate that matches the domain.

When you have users who restrict outbound access through a firewall, they only need to allowlist your two dedicated IP addresses rather than the entire published list of Files.com IP addresses.

Custom domains, and therefore dedicated IPs, are only available on the Power and Enterprise plans.

Once provisioned, dedicated IPs are used for both inbound connections to your site through your custom domain and outbound connections from Files.com to applicable Remote Servers used for Sync and Remote Server Mount.

By default, Files.com uses your dedicated IP addresses for outbound connections to FTP, SFTP, WebDAV, and S3 Compatible remote servers. You can disable the use of your dedicated IP in these cases if you need to — for example, when your counterparty has already allowlisted the main Files.com IP range.