Connectivity
Connectivity and managing Your Comcast Business network
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private IP addresses being sent across internet

I have been using a tool to find all of my IP addresses and I am finding more ip's than I am using localy.  when I do a tracert of one of  the IPs,  I am getting the following info (my IP's have been removed)

yes - i am using private ip address space.

Tracing route to xxx.xxx.xxx.xxx over a maximum of 30 hops

  1    <1 ms    <1 ms    <1 ms  XXX.XXX,XXX.YYY
  2    <1 ms    <1 ms    <1 ms  XXX.XXX.XXX.VVV
  3     7 ms     1 ms     1 ms  XXX.XXX.XXX.CCC
  4     *        *       13 ms  te-4-1-ur02.invergrove.mn.minn.comcast.net [68.85.166.21]
  5    11 ms    10 ms     8 ms  te-2-1-ur02.sims.mn.minn.comcast.net [68.87.174.81]
  6    10 ms     8 ms    12 ms  te-8-3-ur01.sims.mn.minn.comcast.net [68.87.174.77]
  7    25 ms    20 ms    10 ms  te-0-2-0-4-ar01.roseville.mn.minn.comcast.net [69.139.176.118]
  8    19 ms    22 ms    22 ms  pos-0-12-0-0-cr01.350ecermak.il.ibone.comcast.net [68.86.93.217]
  9    48 ms    49 ms    50 ms  pos-3-15-0-0-ar01.woburn.ma.boston.comcast.net [68.86.93.58]
 10    49 ms    52 ms    50 ms  pos-3-15-0-0-ar01.woburn.ma.boston.comcast.net [68.86.93.58]
 11    58 ms    52 ms    68 ms  pos-3-0-0-0-ar01.needham.ma.boston.comcast.net [68.87.146.14]
 12    57 ms    48 ms    46 ms  XXX.XXX.XXX.XXX

Trace complete.

 

Does comcast have somthing setup in their routers wrong since it is routing this private ip space?

 

thanks

 

Lee A.

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Community Manager
Community Manager

Re: private IP addresses being sent across internet

Welcome Lee.   The Comcast gateway routing schema for static ip's is RIP V2, for the D3 gateways the Cable interface has the source IP instead of the WAN interface.  I can check the gateway configuration.   

VIA PM (private message) please send me the full trace data, the MAC Address of the gateway also any info on the hierarchy, ieSmiley TongueC>>switch>>router>>gateway. Etc.. Also are you testing from you private IP space to your public IP address?

 

Thank you

 

 

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Community Manager
Community Manager

Re: private IP addresses being sent across internet

Welcome Lee.   The Comcast gateway routing schema for static ip's is RIP V2, for the D3 gateways the Cable interface has the source IP instead of the WAN interface.  I can check the gateway configuration.   

VIA PM (private message) please send me the full trace data, the MAC Address of the gateway also any info on the hierarchy, ieSmiley TongueC>>switch>>router>>gateway. Etc.. Also are you testing from you private IP space to your public IP address?

 

Thank you

 

 

View solution in original post

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