帮忙看看syslog 什么意思？

[weixin_38073738]

109.117.28.62对我的机器作了什么？
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Oct 20 21:13:46 ca51 sendmail[15135]: [ID 801593 mail.crit] NOQUEUE: SYSERR(root): /var/spool/lp/tmp/::ffff:109.
117.28.62/mail.cf_nobody@::ffff:109.117.28.62: line 0: cannot open: No such file or directory
Oct 20 21:15:43 ca51 sendmail[15164]: [ID 801593 mail.info] i9KDFhi15164: [109.117.28.62]: expn secuiscan_user
Oct 20 21:15:43 ca51 sendmail[15165]: [ID 801593 mail.info] i9KDFhi15165: [109.117.28.62]: expn root
Oct 20 21:15:43 ca51 sendmail[15166]: [ID 801593 mail.info] i9KDFhi15166: [109.117.28.62]: expn decode
Oct 20 21:15:43 ca51 sendmail[15167]: [ID 801593 mail.info] i9KDFhi15167: [109.117.28.62]: vrfy secuiscan_user
Oct 20 21:15:44 ca51 sendmail[15168]: [ID 801593 mail.info] i9KDFii15168: [109.117.28.62]: vrfy root
Oct 20 21:15:44 ca51 sendmail[15163]: [ID 801593 mail.crit] i9KDFhi15163: "wiz" command from [109.117.28.62] (10
9.117.28.62)
Oct 20 21:15:54 ca51 sendmail[15163]: [ID 801593 mail.crit] i9KDFhi15163: "debug" command from [109.117.28.62] (
109.117.28.62)
Oct 20 21:15:54 ca51 sendmail[15170]: [ID 801593 mail.notice] i9KDFsi15170: <n0suchuser>;... User unknown
Oct 20 21:15:54 ca51 sendmail[15170]: [ID 801593 mail.info] i9KDFsi15170: from=[e-mail], size=0, class=0,
nrcpts=1, proto=SMTP, daemon=MTA-IPv4, relay=[109.117.28.62]
Oct 20 21:15:54 ca51 sendmail[15172]: [ID 801593 mail.notice] i9KDFsi15172: ruleset=check_rcpt, arg1=test2@secui
.com, relay=[109.117.28.62], reject=550 5.7.1 [e-mail]... Relaying denied. IP name lookup failed [109.117
.28.62]
Oct 20 21:15:54 ca51 sendmail[15172]: [ID 801593 mail.info] i9KDFsi15172: from=[e-mail], size=0, class=0,
nrcpts=0, proto=SMTP, daemon=MTA-IPv4, relay=[109.117.28.62]
Oct 20 21:15:54 ca51 sendmail[15174]: [ID 801593 mail.notice] i9KDFsi15174: ruleset=check_rcpt, arg1=root@secuis
can.net@109.117.33.151, relay=[109.117.28.62], reject=550 5.7.1 [e-mail]@109.117.33.151... Relaying de
nied. IP name lookup failed [109.117.28.62]
Oct 20 21:15:54 ca51 sendmail[15174]: [ID 801593 mail.info] i9KDFsi15174: from=root@109.117.33.151, size=0, clas
s=0, nrcpts=0, proto=SMTP, daemon=MTA-IPv4, relay=[109.117.28.62]
Oct 20 21:15:54 ca51 sendmail[15175]: [ID 801593 mail.info] NOQUEUE: [109.117.28.62] did not issue MAIL/EXPN/VRF
Y/ETRN during connection to MTA-IPv4
Oct 20 21:15:54 ca51 sendmail[15177]: [ID 801593 mail.notice] i9KDFsi15177: /tmp/by_scanner.mailingtofiles.vulne
rability... Cannot mail directly to files
Oct 20 21:15:54 ca51 sendmail[15177]: [ID 801593 mail.crit] i9KDFsi15177: SYSERR: putoutmsg ([109.117.28.62]): e
rror on output channel sending "500 5.5.1 Command unrecognized: "."": Broken pipe
Oct 20 21:15:54 ca51 sendmail[15177]: [ID 801593 mail.notice] i9KDFsi15177: lost input channel from [109.117.28.
62] to MTA-IPv4 after startup
Oct 20 21:15:54 ca51 sendmail[15177]: [ID 801593 mail.info] i9KDFsi15177: from=[e-mail], size=0, class=0,
nrcpts=0, proto=SMTP, daemon=MTA-IPv4, relay=[109.117.28.62]
Oct 20 21:15:54 ca51 sendmail[15179]: [ID 801593 mail.notice] i9KDFsi15179: Unbalanced '>;'

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