ããã«ã¡ã¯ããã£ããŒã§ãã
SaaS圢äœã®ãµãŒãã¹ã幎ã å¢ããŠããŠããŸãããããã«äŒŽã£ãŠãã®ãããªãµãŒãã¹ãžã®äžæ£ã¢ã¯ã»ã¹ãå¢ããŠããŸããããã¯ãããããã€ã³ã¿ãŒãããããçŽæ¥ã¢ã¯ã»ã¹å¯èœã§ããããšãäžæ£ã¢ã¯ã»ã¹ãé²ãçºã®åºæ¬ã®å¯Ÿçã§ããç°¡åãªãã¹ã¯ãŒãã«ããªãããã¹ã¯ãŒãã«å ããŠMFAïŒMulti-Factor AuthenticationïŒã«ããèªèšŒãè¡ãããŠããªããªã©ãèŠå ãšããŠæããããŸãã
ã»ãã¥ãªãã£ã€ã³ã·ãã³ããçºçããå Žåã調æ»ã«æ¬ ãããªãææãšããŠç£æ»ãã°ãšããã®ããããŸããç£æ»ãã°ã¯ãç°¡åã«èšãã°ããã€ããã誰ããããäœããããããèšé²ããŠããæäœãã°ã®ããšã§ããããã¯ãäžæ£ã¢ã¯ã»ã¹ã«éããã瀟å ã«èµ·å ããæ å ±æŒæŽ©ãçºçããå Žåã®èª¿æ»ããŠãŒã¶ãæ£ãã䜿ãæ¹ãããŠãããçã確èªããçºã«ã䜿ããããã°ã§ãã
ã€ã³ã·ãã³ããçºçããå Žåãç£æ»ãã°ã«èšé²ãããŠããæ å ±ãåºã«ã©ã®IPã¢ãã¬ã¹ããã©ã®ã¢ã«ãŠã³ãã§ãã°ã€ã³ãããã©ã®ããã«æäœãããã®ãã確èªããŸãããããã£ãŠãã»ãã¥ãªãã£ã€ã³ã·ãã³ããå¢ããŠããæšä»ãç£æ»ãã°ã¯çã éèŠãªååšãšãªã£ãŠããŸãã
ä»åã¯ãMicrosoft 365ïŒæ§Office 365ïŒã«ãããç£æ»ãã°ã«ã€ããŠã話ããããšæããŸããåè¿°ã®éãã€ã³ã·ãã³ããçºçããå Žåã«åããŠMicrosoft 365ã®ç£æ»ãã°ã«ã€ããŠç解ããŠããããšã¯éèŠã§ããç£æ»ãã°ã«ã¯ä»¥äžã®ãããªãã®ããããŸãã
ã¡ãªã¿ã«ã¡ãŒã«ããã¯ã¹ã«é¢ããæäœã«é¢ããŠã¯ãExchange mailbox activitiesã§ãã
ç£æ»ãã°ã®é ç®ãåãã©ã¡ãŒã¿ã®èª¬æçã¯ä»¥äžãåç §ãã ããã
ããã§ã¯ãMicrosoft365ã®ç®¡çç»é¢ããç£æ»ãã°ãã©ã®ããã«èª¿ã¹ãã®ããèŠãŠãããŸããããç£æ»ãã°ã«ã¯ãçŸåšã®ãšãã2ã€ãŠãŒã¶ã€ã³ã¿ãã§ãŒã¹ãååšããŸãã
ã»ãMicrosoft 365 admin centerãâ ãCompliance ãâãAuditã
ã»ãOffice 365 admin centerã â ãSecurity & Complianceãâ ãSearchãâãAudit log searchã
ãã¡ãã¯å€ãç»é¢ãªã®ã§ãMicrosoft365 admin centerãããã©ãçãããšãã§ããªããããããŸããããhttps://protection.office.com/ã«çŽæ¥ã¢ã¯ã»ã¹ãããšæ¬èšäºãå·çäžã®4/29/2021æç¹ã§ã¯ããŸã ã¢ã¯ã»ã¹å¯èœã§ããïŒãã¡ãã®ã»ããæ€çŽ¢é ç®ãèŠãããæ€çŽ¢ããããã®ã§ããããã€äœ¿ããªããªããããããã®ã§æ°ããã»ããå©çšããããšããå§ãããŸããïŒ
äžèšã®2ã€ã®ã€ã³ã¿ãã§ãŒã¹ã¯ãã©ã¡ããåãæ å ±ãåºåããŸãã
æ€çŽ¢çµæãšããŠç»é¢äžã«ã¯ãDate, IP Address, User, Activity, Item, Detailãšããé ç®ã衚瀺ãããããã€ãããã©ã®ãŠãŒã¶ãããã©ã®ãããªã¢ã€ãã ãã«ãã©ã®ãããªããšããè¡ã£ãããšããããšãããããŸãã
ããããªããã管çç»é¢ã§å šãŠã確èªããã®ã¯ãªããªãé£ããäœæ¥ã§ãã®ã§ãéåžžã¯æ€çŽ¢çµæãCSVãã¡ã€ã«ã«ExportããŠç¢ºèªããŠãããŸããExportããCSVãã¡ã€ã«ã¯ã以äžã®ããã«ãCreationDateãããUserIdsãããOperationsãããAuditDataããšããé ç®ããããŸãã
ãã®CSV圢åŒãAuditDataã®éšåãäžã€ã®æ å ±ã®å¡ãšãªã£ãŠãããããèŠã«ããç¶æ ã§ãã®ã§Excelã§æŽåœ¢ãããšèŠããããªããªããŸããCSV圢åŒã®ExportããããŒã¿ãExcelã«ãã¿ãã¿Transformã®æ©èœã䜿ãããšã§å®çŸã§ããŸãã
ãã®ããã«ããã°ãExceläžã§é ç®ããšã«ãã£ã«ã¿ãããããããããšãã§ããçºãæ å ±ã®ç¢ºèªããããããªããšæããŸããCSVã§ã®Exportã®æ¹æ³ãExcelã§ã®æŽåœ¢ã«ã€ããŠã¯ã以äžã«çŽ¹ä»ãããŠããŸãã®ã§æ¯éåèã«ããŠã¿ãŠãã ããã
æåŸã«ããã€ãMicrsoft365ã®ç£æ»ãã°ã®æ³šæäºé ã«ã€ããŠã玹ä»ããŸãã
ã»äžèšã§èª¬æããç£æ»ãã°ã®ååŸãšæ€çŽ¢æ©èœã¯ãéåžžã¯ããã©ã«ãã§æå¹ã«ãªã£ãŠããŸããããããªãããOffice 365 Plan1ã䜿çšããŠããå Žåãæå¹åãããŠããªãå Žåãããããšã確èªããŠããŸãããŸãã¯ãç£æ»ãã°ã®ååŸãšæ€çŽ¢æ©èœãæå¹ã«ãªã£ãŠããã確èªããŠãã ããã
ãããæå¹ã«ãªã£ãŠããªãå Žåãæå¹ã«ãããšããŠããã®æç¹ããããã®ãŒã£ãŠãã°ãååŸããããšã¯ã§ããŸããããExchange mailbox activitiesã«é¢ããŠã¯ã2019幎1æ以éäœæãããã¡ãŒã«ããã¯ã¹ã«ã€ããŠã¯ããã©ã«ãã§ç£æ»ãã°ã®ååŸãæå¹ãšãªã£ãŠããŸãã®ã§ã確èªããããšã¯å¯èœã§ãã
ã»ç£æ»ãã°ã®ããã©ã«ãã®ä¿åæéã¯ãE5ã©ã€ã»ã³ã¹ãå²ãåœãŠãããŠãããŠãŒã¶ã¯1幎ããã以å€ã¯90æ¥ã§ããããã90æ¥ä»¥äžã1幎以äžã®ä¿åãå¿ èŠãšããå Žåã¯ãä¿åæéã®å»¶é·ãå¿ èŠã§ãã以äžããåç §ãã ããã
Microsoft 365 admin centerã®ã€ã³ã¿ãã§ãŒã¹ãä»æ§çã«ã€ããŠã¯ãé©å®å€æŽãããŸãã®ã§ææ°æ å ±ãã確èªãã ããã
ãŸãšã
ä»åã¯ãå°ã æéã¯ããããŸããããèªèº«ã§ç£æ»ãã°ã確èªããæ¹æ³ãã玹ä»ããŸãããæ®å¿µãªããäžæ£ã¢ã¯ã»ã¹ã«æ°ãæéå šãæ°ä»ããªãã£ããšããããšããããŸããããã¯ãæ»æè ãæ§ã ãªå·¥äœãè¡ã£ãŠãããäŸãã°ã¡ãŒã«ããã¯ã¹ã«ã«ãŒã«ãè¿œå ãããªã©ãããã¡ãŒã«ãå®éã¯åãåã£ãŠããã®ã«ãŠãŒã¶ã«ã¯æ°ã¥ãããªãããã«åé€ããŠããŸã£ãããããããªããšãããããã§ãããŠãŒã¶ã¯æ°ã¥ããªãå Žåãããããšãåæãšããäžæ£ã¢ã¯ã»ã¹ãäžæ£æäœãèŠã€ããããã«ç£æ»ãã°ãå®æçã«ç¢ºèªããããšããå§ãããŸãã
IIJ America Incã§ã¯ããµã€ããŒã»ãã¥ãªãã£ã«é¢ãããµãŒãã¹ãæäŸããŠããŸãããé»è©±ã§ã®ç¡æçžè«ãåãä»ããŠãããŸãã®ã§ããŸãã¯ãæ°è»œã«Webãã©ãŒã ã«ãŠãåãåãããã ããã