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Jul 27 09:49:38 itbsv1 su(pam_unix)[8061]: session opened for user root by root(uid=0)

?@?u7??27??9??49??38?b?Ɂv?uitbsv1?T?[?o??su?R?}???h?????s????v?u?F?؂ɐ????v?Ƃ??????e???ǂݎ??܂??B???????????e?̏??́A?s???A?N?Z?X???Ď?????ۂɂ͈Ӗ??̂Ȃ??ꍇ???قƂ?ǂł??i?܂??????Ȃ??Ƃ͂????܂??񂪁j?B?????̏ꍇ?A???s???????e?̏??ɈӖ???????܂??B

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Jul 27 10:51:22 itbsv1 login[8276]: FAILED LOGIN SESSION FROM (null) FOR yamada,Authentication failure

2?D?ȉ??̃??O?́A?uroot?v???[?U?[??ssh?ڑ????s???A?p?X???[?h?̔F?؂Ɏ??s?????ꍇ?̋L?^?ł??B

Jul 27 11:21:35 itbsv1 sshd[8306]: Failed password for ROOT from 192.168.0.11 port 1027 ssh2

1?D??2?D???r????ƁA?啶???E???????̈Ⴂ?͂???܂????ufailed?v?̒P?ꂪ?????ɑ??݂??܂??B?܂?A???O?t?@?C??????ufailed?v???܂ލs?𔲂??o???΁A?????Ɏ??s???????b?Z?[?W???????m?F?ł??܂??Bgrep??i?I?v?V???????w?肷??΁A?啶???E???????̋?ʂȂ??????o?????Ƃ??\?ł??B

# grep -i failed /var/log/messages

?@?ufailed?v?ȊO?ɂ??ureject?v??uerr?v?ubad?v?A?v???O?????ɂ???Ắuattack?v?Ȃǂ̕????ł??K?v?ȍs???????o???܂??B

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Jul 27 13:41:01 itbsv1 xntpd[8496]: [ID 866926 daemon.notice] xntpd exiting on signal 10

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/var/log/messages	??ʓI?ȃV?X?e???Ɋւ?????
/var/log/cron	????I?Ɏ??s????鏈???̌??ʂɊւ?????
/var/log/maillog	???[???Ɋւ?????
/var/log/secure	?Z?L?????e?B?Ɋւ?????
/var/log/spooler	?????j???[?X?Ɋւ?????
/var/log/boot.log	OS?N?????Ɋւ?????
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