Reclassify FileCatalyst UDP traffic to a high-priority queue (DSCP EF or AF41) instead of dropping it as “bulk data.”
Add the following paths to antivirus exclusions: filecatalyst blocked
| Layer | Typical Blocking Mechanism | Specific Examples | |-------|----------------------------|--------------------| | | Stateful packet inspection, port blocking | UDP ports 33000–33009 (default) closed; SPI drops non-ICMP responses | | NAT Device | Port exhaustion or mapping failures | Symmetric NAT fails to maintain UDP hole-punching | | Proxy Server | Unsupported CONNECT methods or UDP proxying | HTTP/S proxies intercepting raw UDP traffic | | Endpoint Security | Application whitelisting, DLP rules | Antivirus heuristic blocks FileCatalyst’s kernel driver; DLP blocks file types | | QoS / Traffic Shaping | Rate limiting or drop of UDP bulk traffic | Router polices UDP flows >5 Mbps as “non-essential” | | IDS/IPS | Signature-based drop | False positive match on proprietary UDP pattern | Reclassify FileCatalyst UDP traffic to a high-priority queue
iptables -L -n -v | grep 33000