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Rupt keeps a short sliding window of each user's recent addresses; an evaluation from outside that set flips the ",[212,213,214],"code",{},"is_new_ip"," ",[217,218,219],"a",{"href":106},"check"," to true.",[208,222,223],{},"On its own this is one of the weakest signals there is. IP addresses change constantly: mobile networks rotate them, people move between Wi-Fi and cellular, ISPs reassign them overnight. A new IP is normal for almost everyone almost all the time.",[225,226,228],"h2",{"id":227},"why-it-still-matters","Why it still matters",[208,230,231,232,235,236,239,240,243,244,247],{},"The value shows up in combination. A new IP next to a ",[217,233,234],{"href":142},"new fingerprint",", or one that triggers ",[217,237,238],{"href":130},"impossible travel",", or one that resolves to an ",[217,241,242],{"href":178},"anonymizing network",", is part of the ",[217,245,246],{"href":154},"account takeover"," story. The address being unfamiliar is what makes the rest of the context meaningful.",[225,249,251],{"id":250},"using-it","Using it",[208,253,254,256,257,260,261,264],{},[212,255,214],{}," is available as a ",[217,258,259],{"href":118},"policy"," condition, but rarely as a hard rule on its own, since too many real users would trip it. It's most useful weighted into a ",[217,262,263],{"href":110},"risk"," score alongside stronger checks.",[208,266,267,268,270],{},"The raw IP also feeds geolocation and the ",[217,269,242],{"href":178}," flags. The address itself is internal context, not something Rupt exposes back to your users.",{"title":272,"searchDepth":273,"depth":273,"links":274},"",2,[275,276],{"id":227,"depth":273,"text":228},{"id":250,"depth":273,"text":251},"A new IP is an address Rupt hasn't seen for this user recently. Weak on its own, but a building block for account takeover and a useful policy condition.","md",{},true,"---\ntitle: New IP\ndescription: A new IP is an address Rupt hasn't seen for this user recently. Weak on its own, but a building block for account takeover and a useful policy condition.\n---\n\n# New IP\n\nA new IP means the connecting address isn't one Rupt has recently associated with this user. Rupt keeps a short sliding window of each user's recent addresses; an evaluation from outside that set flips the `is_new_ip` [check](\u002Fdocs\u002Fv3\u002Fconcepts\u002Fchecks) to true.\n\nOn its own this is one of the weakest signals there is. IP addresses change constantly: mobile networks rotate them, people move between Wi-Fi and cellular, ISPs reassign them overnight. A new IP is normal for almost everyone almost all the time.\n\n## Why it still matters\n\nThe value shows up in combination. A new IP next to a [new fingerprint](\u002Fdocs\u002Fv3\u002Fconcepts\u002Ffingerprints), or one that triggers [impossible travel](\u002Fdocs\u002Fv3\u002Fconcepts\u002Fimpossible-travel), or one that resolves to an [anonymizing network](\u002Fdocs\u002Fv3\u002Fconcepts\u002Fanonymizing-network), is part of the [account takeover](\u002Fdocs\u002Fv3\u002Fconcepts\u002Faccount-takeover) story. The address being unfamiliar is what makes the rest of the context meaningful.\n\n## Using it\n\n`is_new_ip` is available as a [policy](\u002Fdocs\u002Fv3\u002Fconcepts\u002Fpolicies) condition, but rarely as a hard rule on its own, since too many real users would trip it. It's most useful weighted into a [risk](\u002Fdocs\u002Fv3\u002Fconcepts\u002Frisks) score alongside stronger checks.\n\nThe raw IP also feeds geolocation and the [anonymizing network](\u002Fdocs\u002Fv3\u002Fconcepts\u002Fanonymizing-network) flags. The address itself is internal context, not something Rupt exposes back to your users.\n",{"title":173,"description":277},"CyRt9G7r_WNS8yytOF7p1H4lTnYhPULaGIk_QqW9Ugg",1780344893626]