This is the same origin that I reported on earlier. Apparently asking
for an explanation of why they were probing our sites only encouraged
them to make additional attempts.
sshd:
Authentication Failures:
unknown (ip-173-201-178-18.ip.secureserver.net): 2 Time(s)
unknown (ip-97-74-196-33.ip.secureserver.net): 2 Time(s)
unknown (ip-97-74-202-95.ip.secureserver.net): 2 Time(s)
root (ip-173-201-252-24.ip.secureserver.net): 1 Time(s)
root (ip-72-167-249-196.ip.secureserver.net): 1 Time(s)
root (ip-72-167-251-87.ip.secureserver.net): 1 Time(s)
root (ip-97-74-121-108.ip.secureserver.net): 1 Time(s)
root (ip-97-74-193-219.ip.secureserver.net): 1 Time(s)
root (ip-97-74-206-13.ip.secureserver.net): 1 Time(s)
unknown (ip-173-201-252-24.ip.secureserver.net): 1 Time(s)
unknown (ip-72-167-249-196.ip.secureserver.net): 1 Time(s)
unknown (ip-72-167-251-87.ip.secureserver.net): 1 Time(s)
unknown (ip-97-74-121-108.ip.secureserver.net): 1 Time(s)
unknown (ip-97-74-193-219.ip.secureserver.net): 1 Time(s)
unknown (ip-97-74-206-13.ip.secureserver.net): 1 Time(s)
Invalid Users:
Unknown Account: 12 Time(s)
So, is there any convenient way to construct an IPTables rule to block
all IPs associated with a given Domain Name server?
dig -x 173.201.178.18
; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.37.rc1.el6_7.4 <<>> -x 173.201.178.18
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1357
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 4
;; QUESTION SECTION:
;18.178.201.173.in-addr.arpa. IN PTR
;; ANSWER SECTION:
18.178.201.173.in-addr.arpa. 3600
IN PTR ip-173-201-178-18.ip.secureserver.net.
;; AUTHORITY SECTION:
201.173.in-addr.arpa. 66199 IN NS cns2.secureserver.net.
201.173.in-addr.arpa. 66199 IN NS cns1.secureserver.net.
;; ADDITIONAL SECTION:
cns2.secureserver.net. 172800 IN A 216.69.185.100
cns2.secureserver.net. 172800 IN AAAA 2607:f208:303::64
cns1.secureserver.net. 172800 IN A 208.109.255.100
cns1.secureserver.net. 172800 IN AAAA 2607:f208:207::64
Like say, cns{1,2}.secureserver.net. Or an entire domain? Say
secureserver.net. ?
--
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Do NOT transmit sensitive data via e-Mail
James B. Byrne mailto:ByrneJB@xxxxxxxxxxxxx
Harte & Lyne Limited http://www.harte-lyne.ca
9 Brockley Drive vox: +1 905 561 1241
Hamilton, Ontario fax: +1 905 561 0757
Canada L8E 3C3
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