FileCatalyst requires specific ports to be open for both the "Command Channel" and the "Data Channel." If these are blocked by a router or network gateway, transfers will fail. YouTube·TechDirectArchive
: Update to the latest FileCatalyst version to patch known security exploits. Banned IP Filters Too many failed login attempts triggering "Auto-Block". filecatalyst blocked
If you are encountering a "FileCatalyst blocked" error, it typically stems from security software, network firewalls, or browser-level restrictions preventing the application from communicating with the server. As a high-performance, UDP-based acceleration tool, FileCatalyst often triggers security flags because it behaves differently than standard TCP-based web traffic. 1. Firewall and Antivirus Blocks FileCatalyst requires specific ports to be open for
Change the FileCatalyst port in the Server Remote Admin Application . Outdated software version (pre-March 2024). If you are encountering a "FileCatalyst blocked" error,
Check the section in the Admin Console and clear your IP from the "Banned" list. Expert Tip
| Test | Command / Action | Expected Result | |------|------------------|------------------| | Connectivity | fcclient --test <server> -p 33001 | SUCCESS: UDP reachable | | Throughput | fcclient --send testfile.dat --rate 100M | Sustained >90% of line rate | | Log check | grep "blocked" /var/log/filecatalyst/* | No entries |