UDP blocked by corporate firewalls and NAT middleboxes

7/10 High

Middleboxes block non-TCP protocols (UDP, DCCP, SCTP) in corporate networks and censoring countries, forcing applications back to TCP despite TCP being unsuitable for many use cases.

UDPTCPDCCPSCTP
Category
networking
Workaround
hack
Stage
deploy
Freshness
persistent
Scope
cross_platform
Recurring
Yes
Buyer Type
enterprise

Sources

Collection History

Query: “What are the most common pain points with TCP/IP for developers in 2025?”4/9/2026

The fact that we have a whole bunch of middle-boxes that don't allow DCCP, SCTP, etc, is hardly the fault of Cerf et al... TCP should have been a layer above UDP, not beside it... This would prevent the blocking of UDP in corporate networks and countries trying to stop P2P networks.

Created: 4/9/2026Updated: 4/9/2026