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192.168.22.X on public internet?

Posted on 2009-07-16
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Trying to figure out why a client's internet is slow-did a tracert from there to a few webservers, and noticed that after packets are handed off from office router to Covad, it passes thru routers with 192.168.22.122 and 192.168.22.73 addresses.  (As a routine matter, when setting up client networks, I use different numbers for the third octet in each case so that I can connect via VPN if at one client and get an emergency call from another).  Seems to me that the above numbers should NOT be used by Covad equipment!  Just fortunate that I haven't used .22. on any other clients, or I might have run into problems earlier.  Can someone confirm that the Covad numbering above should NOT be used on the public internet?
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Question by:davewiecking
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carlson777 earned 500 total points
ID: 24872001
The 192.168.22.0 address space is indeed designated a private address space, but that does not mean that convad could not use them on their own equipment.  Just means that other ISPs will not route the traffic beyond Convad.  This will not interfere with your client even if you did use this address space as your client would never use this address to talk to anything past their own internal network and it will not be shared with your client via any networking protocol.  You will be NATing the address to a public address to anything on the internet.  If you are concerned you can block at the boarder router all private addresses.
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by:carlson777
ID: 24874398
What I meant by not route other traffic beyond Convad, is that the Convad network is a private network and can use private addresses on their network.  The Internet is a collection of ISPs and will only route public addresses between themselves.  So Convad's use of a private IP address space does not cause any issues for you.
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by:davewiecking
ID: 24874502
Thanx for the reply/clarification.  It just seemed to me that if my laptop on the existing network would VPN connect to a 192.168.20.X network, packets intended for the other network would get misdirected by Covad's routers.  But of course that's for the routing tables to determine...
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by:carlson777
ID: 24874714
yes that is what routing is for, but also using the VPN tunnel none of the Convad routers would know your IP address as all packets are encrypted.  Have good one.
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