Data Networking/Fall 2014/Priya/Testing Results
CASE 1
BACK UP WEB-SERVER
When the Primary Web server is down then the secondary web server goes up, this is tested and shown below.
![](http://upload.wikimedia.org/wikiversity/en/thumb/8/8a/DNS_-_Webserver_-_Backups.png/500px-DNS_-_Webserver_-_Backups.png)
CASE 2
DNS Load Balancing
When there are two many requests, then the load is shared between the Master and Slave.
![](http://upload.wikimedia.org/wikiversity/en/thumb/b/b7/DNS_-_Load_balancing.png/500px-DNS_-_Load_balancing.png)
CASE 3
Testing NFS
A file is shared by mounting it to particular client and can avoid sharing from others. This is tested and shown below
Mount Working -
![](http://upload.wikimedia.org/wikiversity/en/thumb/4/4d/Mount_-_working.png/500px-Mount_-_working.png)
Unmount working -
![](http://upload.wikimedia.org/wikiversity/en/thumb/9/9f/Umount_-_working.png/500px-Umount_-_working.png)
CASE 4
Testing FIREWALL
A Firewall is implemented in the Webserver, which denies ping from a specific host but it is capable of pinging others in the network.
Here, the Webserver has created a firewall blocking ping from DNS server but it can ping the DNS sever
PING not working from DNS server to the WEB server:
![](http://upload.wikimedia.org/wikiversity/en/thumb/6/61/Ping_failed.png/400px-Ping_failed.png)
PING working from WEB server to the DNS server:
![](http://upload.wikimedia.org/wikiversity/en/thumb/6/68/Pingweb-dns.png/500px-Pingweb-dns.png)
CASE 5
Testing SSH
SSH has failed to DNS server as the webserver has denied permmission whereas web server provided permission to a particular client.
SSH Failed on DNS server machine
![](http://upload.wikimedia.org/wikiversity/en/thumb/8/8b/Ssh_failed.png/500px-Ssh_failed.png)
SSH working on Client machine
![](http://upload.wikimedia.org/wikiversity/en/2/2c/Ssh_working.png)
CASE 6
Testing rsync
rsync working from DHCP sever to WEB server
![](http://upload.wikimedia.org/wikiversity/en/thumb/7/74/Rsyncc.png/500px-Rsyncc.png)
CASE 7
Testing DHCP
The leases of IP addresses given by DHCP are tested as shown below
![](http://upload.wikimedia.org/wikiversity/en/0/0c/Leases.png)