UBLink技術團隊討論區

> srv nat sessiontimer ?
Usage:
sessiontimer [-<command> <parameter> | ... ]
-t <TCP>
-u <UDP>
-i <IGMP>
-w <TCP WWW>
-s <TCP SYN>
-l <List> : List your all setting

> srv nat sessiontimer -l
-------Your setting (seconds)------
-------TCP Time: 86400 ------
-------UDP Time: 180 ------
-------IGMP Time: 10 ------
-------TCP WWW Time: 60 ------
-------TCP SYN Time: 60 ------

試了一下,照上面指令會出現錯誤,後來試成功的指令如下:

[查看portmaptime 指令]
> portmaptime ?
Usage:
PortmapTimeSetting [-<command> <parameter> | ... ]
-t <sec> : set TCP protocol session timeout.
-u <sec> : set UDP protocol session timeout.
-i <sec> : set IGMP protocol session timeout.
-w <sec> : set TCP WWW protocol session timeout.
-s <sec> : set TCP SYN protocol session timeout.
-f : flush all portmaps (useful for diagnostics)
-l <List> : List your all setting

[檢視目前protmaptime 的設定狀態]
> portmaptime -l
------ Current setting ------
TCP Timeout : 86400 sec.
UDP Timeout : 180 sec.
IGMP Timeout : 10 sec.
TCP WWW Timeout: 60 sec.
TCP SYN Timeout: 60 sec.

[範例:調整tcp time out為 600 sec]
>portmaptime -t 600
> portmaptime -l
------ Current setting ------
TCP Timeout : 600 sec.
UDP Timeout : 180 sec.
IGMP Timeout : 10 sec.
TCP WWW Timeout: 60 sec.
TCP SYN Timeout: 60 sec.

這個設定有什麼用處?

NAT外對內的Port Mapping idle time

TCP Timeout : 86400

有必要這麼大嗎?

Mail SMTP或是POP3收100Mbps

線路上傳只有64kbps時