I discovered this while running a check on fawiki.
P17783 (not public) shows the details.
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Why do you say they are logged with an *invalid* IP? I think that is the private network segment used inside WMF's network, and with IABot running on WM cloud services, it seems reasonable for this IP to be used.
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@ST47's comment indeed sounds correct as Cloud VPS (and Toolforge) currently use the 172.16.0.0/21 network for internal addressing and requests to the wikis. I van't verify without seeing the paste though.
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Maybe I am misunderstanding the situation then. Does IABot somehow log in as a user and do edits on their behalf?
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Ah, I did not know that. I thought its a script that the user runs locally, and was surprised to see internal IPs for the user in question. Closing as invalid.
However, do you happen to know why we are allowing Cloud to access WMF production servers via internal IP? As opposed to a public IP?
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Historical reasons that are very hard to change... T209011: Change routing to ensure that traffic originating from Cloud VPS is seen as non-private IPs by Wikimedia wikis