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Like Is It even possible or true a person can take a websites IP address and insatll It or clone It to his or her modem?

Taking a websites IP and modifying It with his modem

so the modem and the websites IP Matches...

then the person can cause trouble or wreck havor and download a million things which leads the website getting blamed and the person not getting caught.

Is this true or Is It a myth?

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Dani AI

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As already noted, simply changing the IP on a home modem to match a website’s public address will not make the Internet deliver that website’s traffic to the modem. Global routing is controlled by upstream networks and BGP announcements, so a local address change does not reassign the public route. For the scenario described by — “modem and website IP matches” — that alone does not enable anonymous misuse of the real site.

There are, however, real techniques an attacker might use that can look like “someone else is using my IP”:

  • IP spoofing: forging the source IP in packets. Useful for UDP-based reflection/amplification DDoS, but replies normally go to the genuine IP, not the forger, unless the attacker is on-path.
  • ARP poisoning: works only on a local LAN to intercept traffic by lying about MAC-to-IP mappings.
  • BGP prefix hijacking: announcing someone else’s prefix to attract traffic at the routing level. This is powerful and has happened in the wild, but it requires control or cooperation of an upstream AS.
  • DNS hijack or reverse proxying: pointing a domain to a different server or proxying content so visitors see the attacker’s host instead of the original.

Ways to investigate: run traceroute from multiple public locations, check whois/registrant and BGP origin for the prefix, verify authoritative DNS answers and TLS certificate fingerprints, and check server logs for unexpected source IPs or connection patterns. Public BGP viewers and multiple recursive DNS resolvers are useful for cross-checks.

Mitigations include using HTTPS/TLS (so certificates prevent silent impersonation), DNSSEC, hosting behind reputable CDNs/anycast, keeping detailed logs, and asking the ISP to enable ingress filtering (BCP38) and proper route filtering or RPKI ROAs for prefixes. Any attempt to hijack or spoof others’ addresses is illegal and should be reported to the affected hosting provider or upstream ISP.

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Member Avatar for JorgeM

Like Is It even possible or true a person can take a websites IP address and insatll It or clone It to his or her modem?

You can configure any IP address you wish. It doesn't mean it's going to work. First, most importantly, the IP must be public and routable. Second, it must be configured within the correct subnet.

So because routes and subnets controlled by the provider, no... You cannot clone an IP from another Internet host.

Member Avatar for Member #956681

Thanks for the Info.

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