Category Archives: Network

Connect via VPN Client

Overview

Virtual Private Networking (VPN) software creates a secure, encrypted connection between your off-campus computer and the campus network. Members of the University community can use VPN software to connect securely to the campus network from off-campus.  This software, called Junos Pulse, must be downloaded to your computer,  installed and configured. To connect using the full VPN client, download it below, install and configure it as directed.

Install and Configure Junos Pulse Client for iOS and Android devices

The Junos Pulse client app is available for iOS and Android mobile operating systems. Visit the Google Play Store or Apple App Store  to obtain it.

 

Install and Configure Junos Pulse Client for Windows and Mac OS X Systems

Please use the following instructions to configure your new VPN client. After installing, users should login via the client and not via the Connect button at sslvpn.uconn.edu

Step 1:

Download the installer that is appropriate for your OS.

Apple OS X
j-pulse-mac-5.0r11.0-b56747-installer
MD5: fbf0b5dbcefadc6bc87d5b6dac19bcd1
Windows 32 bit
j-pulse-win-5.0r11.0-b56747-32bitinstaller
MD5: 3b283b9a8183f6d052cf1f868d916a37

Windows 64 bit
j-pulse-win-5.0r11.0-b56747-64bitinstaller
MD5: 529f039c4b7528479b29fc3514cdab16

Step 2:

Run the downloaded installer.

  • Note: Some users on OSX may need to command-click/control-click, and then select “Open” if an error about an unidentified developer is encountered.

Step 3:

Launch the now-installed application.
Click the ‘+’ button to add a new connection and enter sslvpn.uconn.edu for the Server URL and “UConn VPN” for the Name.
If ‘Type’ is requested, choose the option that lists SSL-VPN.
Click Add.
Click Connect, and enter your NetID and password into the form, clicking Connect again.

You should now be successfully connected and able to access UConn resources.

 

Compatibility

Junos Pulse VPN client software is compatible with a wide range of operating systems and configurations. It is available  Mac OS X and Windows clients as well as Android and iOS mobile devices.

The software has been tested on the following platforms:

 

Platform Operating System Browser and Java Environment
Windows Windows 8.1, 32 bit Internet Explorer 9.x, 10, 11
Windows 8.1 Enterprise, 64 bit Internet Explorer 8.x, Java 7
Windows 8 Enterprise, 64 bit Internet Explorer 8.x, Java 7
Windows 7 SP1 Enterprise, 64 bit Internet Explorer 8.x, Java 7
Mac OS X Mac OS X 10.9, 64 bit Safari 7.0, Oracle JRE 7
Mac OS X 10.8, 64 bit Safari 6.0, 6.1, Oracle JRE 7
Mac OS X 10.7.3, 64 bit Safari 6.0, 6.1, Oracle JRE 7
  • Notes:
    – Although the software is also compatible with most Windows 8.x, Windows 7, Windows Vista and Windows XP operating systems, specific configurations may not work.
    – Junos Pulse is not supported on Windows Server platforms and Linux platforms.

refer from : http://remoteaccess.uconn.edu/vpn-overview/connect-via-vpn-client/

使用 NetworkManager 設定網路

從 RHEL7/CentOS7 開始,NetworkManager 已經過更好的改良,使用 NetworkManager 服務可以一次設定好網路組態與DNS,而不用再一個一個檔案修改。
nmcli 為 NetworkManager 主要的設定指令,包含豐富的參數選項,更容易調整網路位置,以往在同一張網卡綁定多個 IP 時需要設定多個網路卡網態,現在也需要使用一行指令即可隨意增加或修改。

開始設定

IP 與閘道

  • NIC Name: eno16780032
  • Tag Name: eth0
  • Type: ethernet
  • 1st IPv4 IP: 192.168.1.192/24
  • 2nd IPv4 IP: 192.168.1.25/24
  • IPv4 Default Getway: 192.168.1.1
  • ifname:網路卡名稱(Deivce 編號)
  • con-name:網路卡別名
  • type:網路型態
  • ip4:IPv4 位置,需加上網路區段
  • gw4:IPv4 閘道位置

設定 DNS

  • DNS1: 192.168.1.191
  • DNS1: 8.8.8.8
  • ipv4.dns:設定第 1 組 DNS 位置
  • +ipv4.dns:設定第 2 組 DNS 位置(若有多個會累加)

Start eth0

檢查設定

查看 IP

查看 Routing table

查看 DNS

 

use the Spike-Filter-Option to remove such peaks from being displayed:

You can add spike filters in a sensor’s channel settings. Each filter is valid for the selected channel only. Spike filters are active immediately after saving. They are applied to historic and live data in both tables and graphs.

  • Enter a number into the Spike Filter Max. Value. Values above this value will be disregarded.
  • Enter a number into the Spike Filter Min. Value field. Values below this value will be disregarded.

As you’re using negative values, please try to exchange the two numbers.

ScreenShot 2015-08-17 12.04.02 ScreenShot 2015-08-17 12.03.49

 

http://www.paessler.com/manuals/prtg8/sensor_channels_settings

關于Cisco 3750交換機的堆疊介紹

3750堆疊不同于3550,是真正的堆疊,Catalyst 3750系列使用StackWise技術,它是一種創新性的堆疊架構,提供了一個32Gbps的堆疊互聯,連接多達9台交換機,並將它們整合爲一個統一的、邏輯的、針對融合而優化的設備,從而讓客戶可以更加放心地部署語音、視頻和數據應用,3750采用的是背板堆疊的方式,機器本身有堆疊口需專門的堆疊線可以達到32G帶寬,交換機堆疊後,從邏輯上來說,它們屬于同一個設備。這樣,假如你想對這幾台交換機進行設置,只要連接到任何一台設備上,就可看到堆疊中的其他交換機(3750做堆疊需要專用堆疊線纜,産品自帶0.5米堆疊線纜)。
  一、基本要求:
  ios版本要一致(最好一致)、專用的堆疊模塊和堆疊線纜、最大堆疊個數 9
  二、堆疊的好處:
  高密度端口、便于治理(配置時顯示的是一台交換機,slot號不同)
  三、堆疊實例:
  1:物理連接好堆疊線纜,連接方法爲master的stack1連接到slave的stack2上面。
  2:開master,不作任何的配置。等完全啓動後。
  3:開slave的機器。
  4:不作任何的配置。(線插好,開機自動堆疊選舉,亮 master的就是主)
  注:也可以先做堆疊配置:如IP地址、優先級等等
  四、察看當前堆疊狀態:
  show platform stack-manager all 顯示所有交換堆疊的信息
  show switch 顯示堆疊交換機的彙總信息
  show switch 1 顯示一號交換機的信息
  show switch detail 顯示堆疊成員明細的信息
  show switch neighbors 顯示堆疊鄰居的完整信息
  show switch stack-ports 顯示堆疊交換機的完整端口信息
  五、注重事項
  1、 型號可以不同,但版本一定要想同
  2、 最好斷電下操作,但帶電操作也可以
  3、 3750不能與3550進行堆疊

http://www.cisco.com/c/dam/en/us/products/collateral/switches/catalyst-3560-series-switches/CatalystPoster_Final.pdf