Cisco clock設定

Cisco#show clock
15:19:42.215 UTC Thu Mar 1 2012

Cisco#clock ?
set Set the time and date

Cisco#clock set ?
hh:mm:ss Current Time

Cisco#clock set 16:03:00 ?
<1-31> Day of the month
MONTH Month of the year

Cisco#clock set 16:03:00 1 march ?
<1993-2035> Year

Cisco#clock set 16:03:00 1 march 2012
Cisco#
Mar 1 16:03:00: %SYS-6-CLOCKUPDATE: System clock has been updated from 15:20:15 UTC Thu Mar 1 2012 to 16:03:00 UTC Thu Mar 1 2012, configured from console by vty0 (127.0.0.4).
Cisco#

自動計算IP及Subnet Mask

輸入 IP Address，會自動計算各個 Subnet Mask 的資料：
不用再自己用二進制的算法求 IP Range、Broadcast IP了

檔案下載來源：
http://www.ublink.org/products/IPCalc/IPCalc.php

如何阻擋Team Viewer軟體

TeamViewer 是一款可以穿透防火牆以及代理伺服器的桌面分享及遠端搖控的免費軟體。

Teamviewer連線之前需與Server連線
Connect的Server是 : master.dyngate.com --> 87.230.73.23
可以試著封鎖這個 IP Address

參考網站：http://www.teamviewer.com/index.aspx

路由表

cora@host[/tmp]>#route  <-看路由的資訊
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.30.0    *               255.255.255.0   U     0      0        0 eth1
169.254.0.0     *               255.255.0.0     U     0      0        0 eth1
default         192.168.30.254  0.0.0.0         UG    0      0        0 eth1
cora@host[/tmp]>#route -n  <-以IP方式顯示路由
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.30.0    0.0.0.0         255.255.255.0   U     0      0        0 eth1
169.254.0.0     0.0.0.0         255.255.0.0     U     0      0        0 eth1
0.0.0.0         192.168.30.254  0.0.0.0         UG    0      0        0 eth1
cora@host[/tmp]>#netstat -r  <-看路由的資訊
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
192.168.30.0    *               255.255.255.0   U         0 0          0 eth1
169.254.0.0     *               255.255.0.0     U         0 0          0 eth1
default         192.168.30.254  0.0.0.0         UG        0 0          0 eth1
cora@host[/tmp]>#