172.16.x.x routable?

From: null (null_at_null.null)
Date: 10/15/05 

Date: Sat, 15 Oct 2005 05:41:15 GMT

I was under the impression that 172.16.x.x-172.31.x.x addresses were
used for private ip addresses like the 192.168.x.x addresses are. I
also thought that meant they're not routable. The other day while I was
helping someone they pinged me and the return address on their packets
was 172.16.x.x. They were several hundred miles away so their packets
had to get routed through a number of hops before it got to me. Can
someone explain why this worked? Thanks.

Relevant Pages

  • Re: 172.16.x.x routable?
    ... >I was under the impression that 172.16.x.x-172.31.x.x addresses were used ... >for private ip addresses like the 192.168.x.x addresses are. ... They were several hundred miles away so their packets had to ... that's NATing them or otherwise introducing the packet to your network. ...
    (comp.security.firewalls)
  • Re: Weird IP
    ... usually it's no problem to send packets with private source IP ... IP addresses inside his own network, as long as packets traversing his ... If the attacker and your server are ...
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  • Re: multiple IP addresses on a single machine
    ... send the packets to get those packets to you. ... If you use the private address range 10.x.x.x 192.168.x.x then you can do ... over the public nets. ... you had better agree with your network admin. ...
    (comp.os.linux.networking)
  • Re: 172.16.x.x routable?
    ... >>for private ip addresses like the 192.168.x.x addresses are. ... They were several hundred miles away so their packets had to ... He had a router between his DSL modem and his ... received the ping replies. ...
    (comp.security.firewalls)
  • RE: IP Spoofing/Masquarading
    ... using private address space, ... Routers, firewalls, etc, need to be able to route the ... Private IPs cannot be routed over internet. ... I understand that IP packets can be spoofed ie change the source ...
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