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In this scenario we have an FTP server behind the SonicWall listening on port 2121 configured in Passive Mode.

The below resolution is for customers using SonicOS 6.5 firmware. This release includes significant user interface changes and many new features that are different from the SonicOS 6.2 and earlier firmware. This article describes the method to set a custom control port for FTP. Enabling this option would help SonicWall identify traffic to and from the custom port as FTP traffic. A new option has been introduced to set custom control port for FTP traffic called "Enable FTP Transformations for TCP port(s) in Service Object". 2020, 2121), SonicWall drops the packet as it is not able to identify it as FTP traffic. However, when using non-standard ports (eg. Copy URL The link has been copied to clipboardįile Transfer Protocol (FTP) operates on TCP ports 20 and 21 where port 21 is the Control Port and 20 is Data Port.Content Filtering Client Control access to unwanted and unsecure web content.Capture Client Stop advanced threats and rollback the damage caused by malware.Cloud Firewall (NS v) Next-generation firewall capabilities in the cloud.Cloud App Security Visibility and security for Cloud Apps.Email Security Protect against today’s advanced email threats.Switches High-speed network switching for business connectivity.Wireless Access Points Easy to manage, fast and secure Wi-FI.Secure Mobile Access Remote, best-in-class, secure access.Cloud Edge Secure Access Deploy Zero-Trust Security in minutes.Capture Security appliance Advanced Threat Protection for modern threat landscape.Capture ATP Multi-engine advanced threat detection.Network Security Manager Modern Security Management for today’s security landscape.Security Services Comprehensive security for your network security solution.