Eicon Networks S92 Manuale Utente Scaricare il pdf (Pagina 179)

YuChakTinMichael‘sGIACGCFWProjectAssignment

Page 179

1723/tcpPPTP

8080/tcpproxy

8080/udpproxy

ThefunctionofW2K_VPNisservicingremoteaccess

VPNclientsandnothingelse.Theexistenceofany

activeportmustbeinvestigatedtodetermineifthey

arerelevanttotheremoteaccessfunctions.While

thereisnoknownvulnerabilityontheseportsthat

arerelatedtoRRAS,werecommendthe

considerationoffilteringthem(except1723,whichis

requiredbyPPTP).

Specificattentionmustbegiventoport7,9and13.

AccordingtoCisco,theseportsareknownassmall

serversthatcangetinvolvedinDoSattack

52

.

ThefactthattheOStypeoftheserverisdetected

deservesahighlynegativecomment.Thisallowsa

hackertoinitiateOS/platform/productspecific

attacks.However,withoutafirewallservicerunning

onit,suchweaknesscanhardlybeeliminated.

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Eicon Networks S92 Manuale Utente Pagina 179