Harvesting attacks try to gather the IP addresses of all operating Service Nodes on the network and use ISP level firewalls to block connections to those particular addresses. This censorship is performed mainly on the Tor network. 

Harvesting Attacks in Loki

Deep packet inspection tries to investigate the structuring of each individual packet that passes through a firewall, and drop or block packets that appear to relate to a particular service. 

Deep Packet Inspection in Loki

- Harvesting Attacks
- Deep Packet Inspection

University of Connecticut

Although the Service Node network has no central points of failure, there are two significant censorship threats to the network, being harvesting attacks and deep packet inspection 

IP and Packet Blocking

https://loki.network/wp-content/uploads/2018/10/LokiWhitepaperV3_1.pdf

Loki Whitepaper

Censorship Threats

Users can leverage types of pluggable transports which alter the signature of each packet aiming to appear as normal unblocked traffic. IP blocking is generally avoided by running domain fronting bridges which will encrypt traffic as HTTPS requests to unblocked services like Azure or Cloudflare. Once they reach the unblocked service, the bridge will forward the request to the desired location. In the case of domain fronting, it becomes difficult for a state level actor to prevent the flow of all traffic to popular bridges without causing significant disruption to the general usage of the internet. 

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