: (20052218) (20052227) : 2011 3 30() :

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*SNMP

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*contentsSNMP SNMP SNMP SNMP SNMP & Q&A*

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*SNMP SNMP ?

, Simple Network Management Protocol UDP . . 1,2,3 .

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*SNMP TCP/ IP ICMP PING , /, 88 IAB SGMP SNMP

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*SNMP 1988 IAB SGMP 1 . 1993 1 PDU DES MD5 2 . 1999 2 3 .

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*SNMP (1)SNMP

Manager System = Agent =

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SNMP (2) SNMP(Simple Network Management Protocol) - MIB(Management Information Base) - SMI(Structure of Management Information) -

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*SNMP (3)SNMP : SNMP .: .PDU : 0~4 .

PDU0Get Request1Get Next Request2Set Request3Get Response4Trap

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*SNMP (4)Get Request : Get Next Request : Set Request : Get Response : Agent Trap : Agent

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*SNMP (5)MIB MIB : SNMP, System, Interface, AT, IP,ICMP, TCP, UDP, EGP, TransmissionSMI MIB , , MIB MIB OID

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*SNMP (6)OID . OID , IANA . OID , . system OID 1.3.6.1.2.1.1 .

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*SNMP & (1)SNMP SNMP SNMPv1

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*SNMP & (2)SNMP SNMP Community string SNMP SNMP SNMP

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*SNMP

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OS : Windows XP

: Solarwinds Engineers Tool

SNMP

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Solarwinds Engineers Tool SNMP .

, , E-Mail .

www.Solarwinds.com .

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*(1)

XP 3 SNMP .

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> > Services.msc Enter

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*(2)

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SNMP Service .

7 .

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*(1)Solarwinds Engineers Tool Network Discovery IP Network Browser .

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*(2)IP Network Browser IP . Subnet Address .

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*(3)Subnet Address SNMP IP .

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*(4) IP . .

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*(5) . Public . MIB . . . .

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*(6)5. .

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*(7)6. .7. .8. .

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*(8)9. .10. UDP .11. TCP .

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*1. > 2. SNMP

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*Q & A

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*IP

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*contentsIP ?Mail Traceroute P2P -Q&A*

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*IP ?IP IP , IP IP IP IP .

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*Mail (1)-(GMail)? e-mail . , , e-mail, , , . .

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*Mail (2)-(GMail)

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* (1)

IP , IP . .

FTP Telnet IP .

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* (2)2. : Firewall configuration -Customize WWW (HTTP) 1. : setup System services httpd

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* (3)3. : httpd service httpd start4. :

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* (4)5. : /etc/httpd/logs/access_log-[]

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*Traceroute (1)traceroute IP , IP ISP .traceroute UDP ICMP, IP TTL .a.a.a.a b.b.b.b traceroute traceroute TTL 1 33435 UDP . 1 UDP TTL 0 , ICMP Time Exceeded (Type 11) .a.a.a.a . UDP TTL 2 , . ICMP Port Unreachable(Type 3) .

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*traceroute Traceroute (2) traceroute

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* : tracert tracert 168.126.63.1Traceroute (3)traceroute Sam Spade . Sam Spade .

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*Traceroute (4)Traceroute

Traceroute Route ISP Traceroute .

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*P2P (1)-P2P

Peer to Peer = PC to PC = Personal to Personal P2P , . IP netstat

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*P2P (2)-P2P IP X IP / O

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*P2P (3)- IP . CMD netstat b .

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*P2P (4)- netstat b 1844 192.168.107.220 IP .

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*P2P (4)- . , . IP, . . ID .12345

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*P2P (5)-

LISTEN SYS-SENT SYN_RECEIVED ESTABLISHED3 Way-Handshaking CLOSE-WAIT FIN-WAIT1-2TIME-WAIT .CLOSED

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*P2P (6)- > Nestat ,, V3 LITE , V3 . , .

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*Q & A

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*END

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