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 Topic: user entered ip instead of dns |
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sailor
Joined: 17 Apr 2015
Posts: 79
Location: US
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 Posted: Tue 16 Nov '21 17:21 Post subject: user entered ip instead of dns |
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I was looking at my error log, I see it's filled with people trying to use TLS 1.0, 1.1 and SSL v3.
Is there a way to tell if user used an ip to get to your site instead of DNS?
I believe if it's in error log, it won't even show up in the access log as it didn't get to that point. |
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tangent
Moderator
Joined: 16 Aug 2020
Posts: 312
Location: UK
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| Posted: Wed 17 Nov '21 22:16 Post subject: |
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Apache error log filtering is not as flexible as that available for the access log. However, if your error logs are getting full of extraneous SSL entries, such as failures for TLS 1.1, 1.0 or SSL v3, you could potentially exclude them with something like:-
See http://httpd.apache.org/docs/current/mod/core.html#loglevel - the default level for modules is warn.
Clients will use DNS to resolve what IP address to use to connect to your site, but thereafter the host request header should carry what they put in the address window of their browser, i.e. name or IP. However, IP is going to give them a certificate challenge.
Once their connection request is successful, that detail will be logged in the access log, and can be conditionally filtered if needbe. |
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James Blond
Moderator
Joined: 19 Jan 2006
Posts: 7294
Location: Germany, Next to Hamburg
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| Posted: Sun 21 Nov '21 22:15 Post subject: Re: user entered ip instead of dns |
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| sailor wrote: |
Is there a way to tell if user used an ip to get to your site instead of DNS?
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Another idea is to set up a default vhost aka fetch all, and there you can do a redirect to the main vhost (or don't redirect). In the logs of that vhost you can see the IPs of ppl who try to access your server via IP only. |
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