Hi. Thank you all for this valuable info. What IPs does discourse actually collects? I can see user registration IP and last used IP in user details. Don’t know where to get IPs for every action, such as topic reply etc… If the police comes and asks for logs for a specific topic reply, which Discourse logs exactly should forum owner provide?

Well, in Finland a log that only ISP has, because IP we see isn’t proving anything and never tells person.

The police would still want an IP from you because they would then go to the ISP to ask which house that IP is registered to, or was registered to on the date the alleged offence took place if it’s a dynamic address. Even the ISP can’t link it absolutely with an individual in most cases. I suspect that in most of the world an IP address is linked to an account holder but is used by everyone using the router for that account. So in my case the ISP would give my name, but my router is regularly used by at least 10 different people, some family members and some visiting friends. Whilst an IP address wouldn’t necessarily link to a specific individual it can give the police a line of enquiry to follow. If the police want to use the information in a meaningful way then they would also need to provide a lot more evidence to conclusively prove that a certain person made a specific post on your forum.

[image] Chris McMahon: The police would still want an IP from you because they would then go to the ISP to ask which house that IP is registered to No they don’t. Because most of the world don’t use IP addresses that way. And that is one of the several reasons why police here in Finland (apply at least whole Nordic) is not interested about IP — it is useless and doesn’t prove anything and doesn’t pinpoint a person. And if in your direction ISPs are using IP-addresses differently then I’m not suprised IP4-space is so full. Of course logging IP like every second is possible. But it is waste of resources for nothing. You should doublechek if demand of that is real, not what you are afrading of.

I can’t speak for Finland (other than noting that there are 3 IPv4 addresses assigned for every member of the Finnish population and in the UK we only have 2 per person) but in the UK every domestic router I’ve looked at in recent years has a real world routable (non-private address space) WAN IP address (mostly DHCP assigned). Prior to retirement I worked with some very serious investigative organisations and I can assure you that they like to know about IP addresses. I’m not saying that an IP address is used the sole item of evidence that has has been used to convict someone, but they are definitely used as part of the investigative process in some parts of the world outside Finland, or at least they were 3.5 years or so ago. [image] Jakke Flemming: logging IP like every second is possible I’ve not seen anyone suggest that. The question was about the IP address of the poster of a message. Unless you have a very busy forum then you’re probably not seeing a new post per second!

What it can be used for/how useful is the info aside… Your Discourse site stores a user’s registration IP address for as long as the user exists on the site. It also stores a user’s ‘last IP address’, which is updated each time a user logs into the site. These IP addresses are removed from the site when a user is deleted or anonymized, though can be retained in the logs if the log anonymizer details site setting is left enabled. IPs are also stored in the topic_views table, but only for anonymous users. That table also only records when a user/ip first views a topic, and not any subsequent ones.

In addition to what @JammyDodger said, in a standard install you would provide the nginx logs, that contain the IP address of every request that reached your server and can easily be correlated to both the request that made the reply, and to the specific ISP customer that pays for the internet connection. Provided that the request isn’t old enough to have been rotated out of the logs.

[image] kdiamond: If the police comes and asks for logs for a specific topic reply, which Discourse logs exactly should forum owner provide? This depends first about if the police have a search warrant, and/or if an administrator wishes to share information voluntarily. I.P. can help to identify a person or their location. [image] Jakke Flemming: No they don’t. Because most of the world don’t use IP addresses that way. And that is one of the several reasons why police here in Finland (apply at least whole Nordic) is not interested about IP — it is useless and doesn’t prove anything and doesn’t pinpoint a person. I don’t know about this, maybe in general there is truth in that but not as an absolute. I.P. addresses that are tied to a physical location can be masked through annother network, that may be what you are talking about?

Thank you all for your replies. I was kind of expecting Discourse to log any forum content modification action (such as creating, editing, or deleting posts). So whenever forum content gets modified in any way possible, there is a log file with an IP used. This seemed the most logical thing to expect, but obviously, it isn’t so. No problem there, of course. So, in case a problem happens and the police come with a warrant or court order, I guess they will go after web server logs in this case nginx logs that will match the forum post timestamps? Is my understanding correct?

[image] Jakke Flemming: [image] packman: The police would still want an IP from you because they would then go to the ISP to ask which house that IP is registered to No they don’t. Because most of the world don’t use IP addresses that way. Yes they do. In case IP addresses are dynamically allocated, every ISP keeps a log of which customer got which IP address at which moment. So an IP address-datetime tuple will uniquely identify a customer.

[image] kdiamond: So, in case a problem happens and the police come with a warrant or court order, I guess they will go after web server logs in this case nginx logs that will match the forum post timestamps? Is my understanding correct? That is probably correct, I’m no expert about this though. This brings up a question I had about discourse hosting, I don’t know with forums hosted on their servers if they ever get requests for records directly how those are dealt with? There are a few different categories of events where cops or lawyers may call, one would be if classified government documents are published what to do about those.

What IP information does Discourse collect?

Product Support

RGJ (Richard - Communiteq) October 8, 2023, 6:58pm 11

Yes they do. In case IP addresses are dynamically allocated, every ISP keeps a log of which customer got which IP address at which moment. So an IP address-datetime tuple will uniquely identify a customer.

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What IP information does Discourse collect?

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