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Author Topic: IP Address changing on Visualroute????
Mikebyrne
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Icon 5 posted May 03, 2006 08:11      Profile for Mikebyrne     Send New Private Message       Edit/Delete Post   Reply With Quote 
Why do IP address change each day when on route to a destination such as www.yahoo.com??

For example if there are 10 hops on route why is step 7 diffrent each day??

Posts: 127 | From: Ireland | Registered: May 2006  |  IP: Logged
drunkennewfiemidget
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Icon 1 posted May 03, 2006 08:56      Profile for drunkennewfiemidget     Send New Private Message       Edit/Delete Post   Reply With Quote 
Google for:

BGP, round-robin DNS, DNS failover, and routing redundancy.

Posts: 4897 | From: Cambridge, ON, Canada | Registered: Jun 2004  |  IP: Logged
Mikebyrne
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Icon 1 posted May 03, 2006 09:40      Profile for Mikebyrne     Send New Private Message       Edit/Delete Post   Reply With Quote 
Cheers!

Any other suggestions from the world?

Posts: 127 | From: Ireland | Registered: May 2006  |  IP: Logged
Stereo

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Icon 1 posted May 03, 2006 10:42      Profile for Stereo     Send New Private Message       Edit/Delete Post   Reply With Quote 
I think DNF said it all. In techno-talk, sure, but what do you expect from a site called Geek Culture?

Ok, so here's the translation: the main point of the Internet is to have many paths between two given computers. This way, if one relay breaks, you can still access the data. Now, there are many ways to achieve that. Some are a given (when one computer fails or is overloaded, the packets are relayed to another one), some are planned (load balance between servers). DNF named you a few techniques you can look up if you want to know more.

So, chances are your 7th relay uses some kind of planned load balancing (or all the possible paths are very busy, but I doubth it), and the other ones are either set (as between your computer and your ISP) or otherwise usually available.

Have fun tracing the steps of your pings! (whois can be your friend, too!)

--------------------
Eppur, si muove!

Galileo Galilei

Posts: 2289 | From: Gatineau, Quebec, Canada | Registered: Apr 2001  |  IP: Logged
dragonman97

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Icon 1 posted May 03, 2006 11:17      Profile for dragonman97   Author's Homepage     Send New Private Message       Edit/Delete Post   Reply With Quote 
Stereo: In this case, the main point is load balancing.

code:
$ dig www.yahoo.com a

; <<>> DiG 9.3.1 <<>> www.yahoo.com a
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 2039
;; flags: qr rd ra; QUERY: 1, ANSWER: 9, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.yahoo.com. IN A

;; ANSWER SECTION:
www.yahoo.com. 37 IN CNAME www.yahoo.akadns.net.
www.yahoo.akadns.net. 7 IN A 216.109.118.73
www.yahoo.akadns.net. 7 IN A 216.109.118.75
www.yahoo.akadns.net. 7 IN A 216.109.118.76
www.yahoo.akadns.net. 7 IN A 216.109.118.77
www.yahoo.akadns.net. 7 IN A 216.109.117.107
www.yahoo.akadns.net. 7 IN A 216.109.117.204
www.yahoo.akadns.net. 7 IN A 216.109.117.206
www.yahoo.akadns.net. 7 IN A 216.109.118.70

;; Query time: 0 msec
;; SERVER: a.b.c.d#53(a.b.c.d)
;; WHEN: Wed May 03 14:07:38 2006
;; MSG SIZE rcvd: 193

Yahoo! uses Akamai, a major load balancing/content delivery company. Akamai's core business is its ability to guarantee that your content can be accessed by *lots* of people. This requires lots of servers, and needless to say, these servers can't serve pages out to people if the traffic isn't directed at them - hence round-robin DNS. Some of the root servers run anycast, but I'm not sure that many companies use it for their DNS - I'm not an expert in this area.

Seriously...google it and/or read up in Wikipedia.

--------------------
There are three things you can be sure of in life: Death, taxes, and reading about fake illnesses online...

Posts: 9332 | From: Westchester County, New York | Registered: May 2001  |  IP: Logged
Mikebyrne
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Icon 7 posted May 03, 2006 12:47      Profile for Mikebyrne     Send New Private Message       Edit/Delete Post   Reply With Quote 
I'm tracing the route of 5 address over 5 days

www.yahoo.com
www.ibm.com
www.amazon.com
www.amazon.co.uk
www.google.com

Noting the diffrence over the 5 day period

Do any of these sites block the use of tracing programs by any chance??

Is there anything else I should look into??

THANKS FOR ALL THE HELP GUYS!!!!

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drunkennewfiemidget
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Icon 1 posted May 03, 2006 13:51      Profile for drunkennewfiemidget     Send New Private Message       Edit/Delete Post   Reply With Quote 
I'd suggest you look into how tracerouting works, then, because it's not up to the final host as to whether you can trace your way there. They can only stop specific routers that are within their control along the path from sending out ICMP TTL-EXCEEDED packets.
Posts: 4897 | From: Cambridge, ON, Canada | Registered: Jun 2004  |  IP: Logged
Mikebyrne
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Icon 1 posted May 03, 2006 14:04      Profile for Mikebyrne     Send New Private Message       Edit/Delete Post   Reply With Quote 
Again, thanks for the info.

If anyone else has a comment feel free to respond

Posts: 127 | From: Ireland | Registered: May 2006  |  IP: Logged
dragonman97

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Icon 1 posted May 03, 2006 14:11      Profile for dragonman97   Author's Homepage     Send New Private Message       Edit/Delete Post   Reply With Quote 
quote:
Originally posted by Mikebyrne:
Again, thanks for the info.

If anyone else has a comment feel free to respond

READ!!!!

Seriously...it's the best way to learn, and honestly, it can be tiring for the rest of us to explain all of it. Some very competent people have already published helpful guides online - it's up to you to read them.

Want to know the nitty-gritty: read the RFCs. That's the good sh*t.

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There are three things you can be sure of in life: Death, taxes, and reading about fake illnesses online...

Posts: 9332 | From: Westchester County, New York | Registered: May 2001  |  IP: Logged
Mikebyrne
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Icon 1 posted May 03, 2006 14:24      Profile for Mikebyrne     Send New Private Message       Edit/Delete Post   Reply With Quote 
Haven't had time to read up on all the info yet.

Currently typing up the 25 Routing Tables (THE JOYS!!!)

In relation to my last point about blocking packets. Some hops come back with no reading at all??

Posts: 127 | From: Ireland | Registered: May 2006  |  IP: Logged
Mikebyrne
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Icon 1 posted May 03, 2006 14:41      Profile for Mikebyrne     Send New Private Message       Edit/Delete Post   Reply With Quote 
Right the tables are finaly done and a big thank you to everyone who helped!!

Its all making sense up untill i trace www.ibm.com

Its all over the place!!!

Posts: 127 | From: Ireland | Registered: May 2006  |  IP: Logged


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