Date: Wed, 18 Jul 2018 20:07:15 +0000 From: Grzegorz Junka <list1@gjunka.com> To: freebsd-security@freebsd.org Subject: Possible break-in attempt? Message-ID: <594ba84b-0691-8471-4bd4-076d0ae3da98@gjunka.com>
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Sometimes I am receiving messages like this from my server: nas.myserver.mydomain.com login failures: Jul 17 08:35:02 nas sshd[5994]: reverse mapping checking getaddrinfo for 162.132-254-62.static.virginmediabusiness.co.uk [62.254.132.162] failed - POSSIBLE BREAK-IN ATTEMPT! On different days they are from different IPs and they would-be mapped to different reverse dns names. How to deal with those messages/attempts? GrzegorzJ
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