fish77
join:2008-05-08
Ethiopia
| [Windows] Can a router take its public IP address from the priva
My OS is Windows XP sp2. When I run the tracert of a certain website in the command window, it displays the lists of the hops(routers) between my PC and the destination website. Some of the routers have an IP address from the private IP range as their public IP. Is it possible? how can it communicate with the other routers while it has a ip address from the private range?
Here is the result when I run the command
'tracert www.google.com'
Tracing route to www.l.google.com [66.249.91.103]
over a maximum of 30 hops:
1 1 ms 1 ms 1 ms 192.168.1.1
2 700 ms 734 ms 814 ms 10.40.14.125
3 * * * Request timed out.
4 757 ms 824 ms 842 ms 10.1.1.4
5 759 ms 826 ms * 10.1.1.21
6 * * * Request timed out.
7 707 ms * 941 ms serial5-5.gw4.lnd2.alter.net [158.43.30.53]
8 834 ms 687 ms 741 ms GigabitEthernet5-0.CR2.LND5.ALTER.NET [158.43.157.129]
9 967 ms 1045 ms 1035 ms so-7-0-0.XR2.LND2.ALTER.NET [158.43.233.246]
10 1034 ms 1023 ms 1051 ms so-3-0-0.TL2.LND2.ALTER.NET [146.188.7.234]
11 889 ms 951 ms 995 ms POS1-0-1.BR1.LND18.ALTER.NET [146.188.6.118]
12 1014 ms 878 ms 664 ms ge-6-15.car3.London1.Level3.net [4.68.63.153]
13 863 ms 949 ms 1014 ms ae-32-52.ebr2.London1.Level3.net [4.68.116.62]
14 976 ms 945 ms 981 ms ae-2.ebr2.Amsterdam1.Level3.net [4.69.132.134]
15 988 ms 943 ms 899 ms ae-21-54.car1.Amsterdam1.Level3.net [4.68.120.111]
16 1082 ms 842 ms 873 ms GOOGLE-INC.car1.Amsterdam1.Level3.net [212.72.46.230]
17 939 ms 1122 ms 1131 ms 64.233.175.246
18 1175 ms 977 ms 1041 ms 72.14.233.81
19 1161 ms 1013 ms 806 ms 66.249.94.154
20 873 ms 993 ms 1103 ms ik-in-f103.google.com [66.249.91.103]
Trace complete.
Thank you in advance, |
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PetePuma
How many lumps do you want
Premium,MVM
join:2002-06-13
Arlington, VA | Re: [Windows] Can a router take its public IP address from the p
Private IPs are still routable, just not publicly routable. However, that doesnt' prevent your ISP from using those IPs internally. |
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Kilroy
Premium,MVM
join:2002-11-21
Ann Arbor, MI
 ·WOW Internet and C..
| reply to fish77
As PetePuma  said, this are most likely your ISP's internal network that you're seeing.
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How hard does DRM have to bite before business abandon it? |
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fish77
join:2008-05-08
Ethiopia | Thank you for your replies,
Is there any mechanism that I know the public ip addresses of these routers, that respond their internal address for the tracert command? |
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vpoko
Premium
join:2003-07-03
Jamaica Plain, MA
| said by fish77 :Thank you for your replies, Is there any mechanism that I know the public ip addresses of these routers, that respond their internal address for the tracert command? Just have someone run a tracert to you. |
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Kilroy
Premium,MVM
join:2002-11-21
Ann Arbor, MI
·WOW Internet and C..
| reply to fish77
The routers don't have a public and private address unless they are the last one. The forward facing address will be the public IP address and the rear facing address will be the private 10. address. The address is either on the 6th or 7th hop from the tracert you posted. Proir to the 6th hop you are on your ISP's internal network.
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How hard does DRM have to bite before business abandon it? |
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LLigetfa
join:2006-05-15
Fort Frances, ON | reply to fish77
My guess is somewhere around hop 6 is a NAT/PAT device and that the OP is getting a private IP at his/her router. |
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PetePuma
How many lumps do you want
Premium,MVM
join:2002-06-13
Arlington, VA
| said by LLigetfa :My guess is somewhere around hop 6 is a NAT/PAT device and that the OP is getting a private IP at his/her router. Not necessarily. The ISP can have privately-addressed routers internally yet still be routing traffic for public IPs at the edge. With Verizon, my first hop is a 10.x.x.x address, though I definitely have a public IP. |
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vpoko
Premium
join:2003-07-03
Jamaica Plain, MA | Likewise with my old Earthlink DSL account. Had a private IP on the first few outbound hops, but had a public IP address. |
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LLigetfa
join:2006-05-15
Fort Frances, ON
| With all due respect, given the OP's contry of origin and the terrible ping times to the 2nd hop and beyond, I still believe the ISP is giving a private IP and doing NAT/PAT.
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Strange as it seems, no amount of learning can cure stupidity, and formal education positively fortifies it. -- Stephen Vizinczey |
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