Solved

Ping basics

Posted on 2012-03-21
4
380 Views
Last Modified: 2012-06-27
I was given a list of public IP addresses for servers in the DMZ (approx 10). I was asked to try a ping from outside the network to ensure I get a response. Can I ask a very basic (please keep answers basic) question - if you ping one public IP address, often you "get a response from" a totally different IP address. Why would that be. The servers are either related to mail, websites or citrix.
0
Comment
Question by:pma111
  • 2
4 Comments
 
LVL 11

Accepted Solution

by:
rowansmith earned 250 total points
ID: 37746553
What does the actual response look like?  Can you paste here?  Feel free to obscure the first number of the IP addresses if you like.
0
 
LVL 3

Author Comment

by:pma111
ID: 37746579
C:\>ping xx.xx.xxx.xx2

Pinging xx.xx.xxx.xxx with 32 bytes of data:

Reply from xx.xx.xxx.xx0: bytes=32 time=9ms TTL=240
Reply from xx.xx.xxx.xx0: bytes=32 time=9ms TTL=240
Reply from xx.xx.xxx.xx0: bytes=32 time=9ms TTL=240
Reply from xx.xx.xxx.xx0: bytes=32 time=9ms TTL=240

Ping statistics for xx.xx.xxx.xx2:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 9ms, Maximum = 9ms, Average = 9ms
0
 

Assisted Solution

by:greensuman
greensuman earned 250 total points
ID: 37746586
Hi,

i hope there may be some NAT  (Network Address Translation) has been done to reach the DMZ servers. due to that your getting some different ip address

Thanks
greensuman
0
 
LVL 11

Expert Comment

by:rowansmith
ID: 37746615
Heh, you've probably hidden a bit to much information....

But the Firewall could be responding, it could be that the IP address is a secondary and the primary address is responding.  There are actually quite a few reasons why this could occur.

It could also be a NAT issue with the Firewall, not rewriting the IP address inside the PING packet...

You'd need to put a network analyser on to figure out exactly why it is happening.
0

Featured Post

PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

PRTG Network Monitor lets you monitor your bandwidth usage, so you know who is using up your bandwidth, and what they're using it for.
When it comes to security, there are always trade-offs between security and convenience/ease of administration. This article examines some of the main pros and cons of using key authentication vs password authentication for hosting an SFTP server.
Viewers will learn how to connect to a wireless network using the network security key. They will also learn how to access the IP address and DNS server for connections that must be done manually. After setting up a router, find the network security…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

803 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question