List

For Network packets, the below network functions can be used to control the traffic:

• Routing
• Network - Firewall
• Network Translation (NAT, Masquerade,…)
• Net proxy (socks proxy)

Implementation

Note that they can be implemented by:

• software: Net Server
• or hardware: Router

Protocol

For packets with a known payload structure, the servers build on Net Server can also implement routing for their protocol. For example:

• for HTTP, HTTP - Proxy
• for SMTP, What is a Mail Transfer Agent (MTA) or Relay in SMTP? (Email Smtp Server)

tc (Traffic Control)

Traffic Control

• Simulate Latency

tc qdisc add dev eth0 root netem delay 2000ms

• Remove the rule

tc qdisc add del eth0 root netem