Only monitor UDP and TCP traffic using iftop.

Only monitoring UDP or TCP traffic via the iftop command, the following options are available:

Monitor Only TCP Traffic:

    sudo iftop -P -f "tcp"

Monitor Only UDP Traffic :

    sudo iftop -P -f "udp"

Here’s a quick breakdown:

• -P: 此选项显示端口号而非服务名称。
  • -f "tcp": 此选项过滤流量以仅显示TCP。
  • -f "udp": 此选项过滤流量以仅显示UDP。

you may integrate these alongside iftop options for additional customization.