cnbatch
commented
11 months ago Both kcptube and udphop have the same meaning for "dport_refresh": it can be either a destination or dynamic. 无论是 kcptube 还是 udphop，这个 dport_refresh 的意思都是一样的：既可以是 destination，又可以是 dynamic。
I have mentioned in https://www.v2ex.com/t/956158 under ‘features’: ‘unconditional port jumping (even when the server is in single-port mode, the client still changes the sending port).’ 我在 https://www.v2ex.com/t/956158 列出“特点”时就提到过：“无条件端口跳跃（服务器单端口模式时客户端照样更换发送端口）”
In other words, the source port of the client will always be changed. 换句话说，客户端的源端口一定会更换的。
There is one difference between kcptube and udphop — dport_refresh=0 can be set in kcptube to completely disable port refreshing. Once disabled, no ports will be changed anymore.
相较于 udphop，kcptube 有个不同之处——可以设置 dport_refresh=0 彻底禁用端口刷新，禁用后就不再更换任何端口了。
Is d an abbreviation for destination? 这里的d是否是destination的缩写词？
Based on the above guesses, I think that dport_refresh refers to the refresh interval of the UDP target port, is my understanding correct? 基于以上猜测，我认为dport_refresh指的是udp目标端口刷新的时间间隔，我的理解是否正确？
I'm also wondering, why would flushing the destination port be considered, rather than modifying the source port? 我还想知道，为什么会考虑刷新目标端口，而不是修改源端口？