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Saturday, 19 September 2015

QoS

QoS = against the classic FIFO. Melawan FIFO klasik.

FIFO menyebabkan semua trafik sama. Trafik yang berurgensi lebih penting di

QoS bisa dilihat di penerbangan.
Kelas Ekonomi
Kelas Bisnis

Atau gak usah jauh-jauh, analaogi QoS bisa dilihat di tukang pangkas.
Jumlah tukang pangkas
Jumlah rata-rata pasien per tukang pangkas per jam.

QoS mechanism:
1. Classification --> NBAR and DSCP
2. Marking --> CB-Marking
3. Congestion Management --> LLQ
4. Shaping --> CB-Shaping or FRTS
5. Link Efficiency --> Header Compression and LFI

QoS mechanism: How can we implement this below picture:

http://ptgmedia.pearsoncmg.com/images/chap06_1587201283/elementLinks/fig04.jpg

1st. define how many queue? 5

Friday, 18 September 2015

Cisco DHCP

1. Using IP Helper Addresses for DHCP
Router#configure terminal
Router1(config)#interface Ethernet 0
Router1(config-if)#ip helper-address 172.25.1.1
Router1(config-if)#ip helper-address 172.25.10.7
Router1(config-if)#exit
Router1(config)#end
Router1#

The ip helper-address configuration command allows the router to forward local DHCP requests to one or more centralied DHCP servers.

2. Limiting the impact of IP Helper Address
Router1# configure terminal
Router1(config)#no ip forward-protocol udp tftp
Router1(config)#no ip forward-protocol udp nameserver
Router1(config)#no ip forward-protocol udp domain
Router1(config)#no ip forward-protocol udp time
Router1(config)#no ip forward-protocol udp netbios-ns
Router1(config)#no ip forward-protocol udp netbios-dgm
Router1(config)#no ip forward-protocol udp tacacs
Router1(config)#end
Router1#

After configuring IP helper addresses, you suffer from high link utilization / high CPU utilization on the DHCP server.

3. Using DHCP to Dynamically Configure Router IP address
Router1#configure terminal
Router1(config)#interface FastEthernet0/1
Router1(config-ig)#ip address dhcp
Router1(config-if)#end
Router1#

The ip address dhcp configuration command allows ther router to obtaion the address information for an interface dynamically.

Router1#show ip interface
FastEthernet0/1 is up, line protocol is up
    Internet address is 172.25.1.57/24
    Broadcast address is 255.255.255.255
    Address determined by DHCP
    MTU is 1500 bytes
    <removed for brevity>

4. Dynamically allocating Client IP address via DHCP

5. Defining DHCP Configuration options
Router1#configure terminal
Router1(config)#ip dhcp pool ORAserver
Router1(dhcp-config)#host 172.25.1.34 255.255.255.0
Router1(dhcp-config)#client-name bigserver
Router1(dhcp-config)#default-router 172.25.1.1 172.25.1.3
Router1(dhcp-config)#domain-name oreilly.com
Router1(dhcp-config)#dns-server 172.25.1.1 10.1.2.3
Router1(dhcp-config)#netbios-name-server 172.25.1.1
Router1(dhcp-config)#netbios-node-type h-node
Router1(dhcp-config)#option 66 ip 10.1.1.1
Router1(dhcp-config)#option 33 ip 192.0.2.1 172.25.1.3
Router1(dhcp-config)#option 31 hex 01
Router1(dhcp-config)#lease 2
Router1(dhcp-config)#exit
Router1(config)#end
Router1#

RFC 2132 defines a large number of standard configurable options.

6. Allocating static IP address with DHCP
You want to configure
Router1#configure terminal
Router1(config)#ip dhcp pool IAN
Router1(dhcp-config)#host 172.25.1.13 255.255.255.0
Router1(dhcp-config)#client-identifier 0100.0103.85e9.87
Router1(dhcp-config)#client name win2k
Router1(dhcp-config)default-router 172.25.1.1
Router1(dhcp-config)#exit
Router1(config)#end
Router1#

7. Configuring a DHCP database client
You want to backup your database DHCP address assignment to another device so that you won't lose it if the router reloads.

Router1#configure terminal
Router1(config)#

8. Configuring multiple dhcp server per 1 subnet
You want to
Router1# configure terminal
Router1(config)#ip dhcp pool 172.22.1.0/24
Router1(dhcp-config)# network 172.22.1.0 255.255.255.0
Router1(dhcp-config)# domain-name Oreilly.com

Oleh-oleh ketika scanning nmap windows 7 sendiri



Skipping SYN Stealth Scan against 192.168.1.17 because Windows does not support scanning your own machine (localhost) this way.



Nmap scan report for 192.168.1.17



Host is up.



PORT      STATE   SERVICE



7/tcp     unknown echo



9/tcp     unknown discard



13/tcp    unknown daytime



21/tcp    unknown ftp



22/tcp    unknown ssh



23/tcp    unknown telnet



25/tcp    unknown smtp



26/tcp    unknown rsftp



37/tcp    unknown time



53/tcp    unknown domain



79/tcp    unknown finger



80/tcp    unknown http



81/tcp    unknown hosts2-ns



88/tcp    unknown kerberos-sec



106/tcp   unknown pop3pw



110/tcp   unknown pop3



111/tcp   unknown rpcbind



113/tcp   unknown ident



119/tcp   unknown nntp



135/tcp   unknown msrpc



139/tcp   unknown netbios-ssn



143/tcp   unknown imap



144/tcp   unknown news



179/tcp   unknown bgp



199/tcp   unknown smux



389/tcp   unknown ldap



427/tcp   unknown svrloc



443/tcp   unknown https



444/tcp   unknown snpp



445/tcp   unknown microsoft-ds



465/tcp   unknown smtps



513/tcp   unknown login



514/tcp   unknown shell



515/tcp   unknown printer



543/tcp   unknown klogin



544/tcp   unknown kshell



548/tcp   unknown afp



554/tcp   unknown rtsp



587/tcp   unknown submission



631/tcp   unknown ipp



646/tcp   unknown ldp



873/tcp   unknown rsync



990/tcp   unknown ftps



993/tcp   unknown imaps



995/tcp   unknown pop3s



1025/tcp  unknown NFS-or-IIS



1026/tcp  unknown LSA-or-nterm



1027/tcp  unknown IIS



1028/tcp  unknown unknown



1029/tcp  unknown ms-lsa



1110/tcp  unknown nfsd-status



1433/tcp  unknown ms-sql-s



1720/tcp  unknown h323q931



1723/tcp  unknown pptp



1755/tcp  unknown wms



1900/tcp  unknown upnp



2000/tcp  unknown cisco-sccp



2001/tcp  unknown dc



2049/tcp  unknown nfs



2121/tcp  unknown ccproxy-ftp



2717/tcp  unknown pn-requester



3000/tcp  unknown ppp



3128/tcp  unknown squid-http



3306/tcp  unknown mysql



3389/tcp  unknown ms-wbt-server



3986/tcp  unknown mapper-ws_ethd



4899/tcp  unknown radmin



5000/tcp  unknown upnp



5009/tcp  unknown airport-admin



5051/tcp  unknown ida-agent



5060/tcp  unknown sip



5101/tcp  unknown admdog



5190/tcp  unknown aol



5357/tcp  unknown wsdapi



5432/tcp  unknown postgresql



5631/tcp  unknown pcanywheredata



5666/tcp  unknown nrpe



5800/tcp  unknown vnc-http



5900/tcp  unknown vnc



6000/tcp  unknown X11



6001/tcp  unknown X11:1



6646/tcp  unknown unknown



7070/tcp  unknown realserver



8000/tcp  unknown http-alt



8008/tcp  unknown http



8009/tcp  unknown ajp13



8080/tcp  unknown http-proxy



8081/tcp  unknown blackice-icecap



8443/tcp  unknown https-alt



8888/tcp  unknown sun-answerbook



9100/tcp  unknown jetdirect



9999/tcp  unknown abyss



10000/tcp unknown snet-sensor-mgmt



32768/tcp unknown filenet-tms



49152/tcp unknown unknown



49153/tcp unknown unknown



49154/tcp unknown unknown



49155/tcp unknown unknown



49156/tcp unknown unknown



49157/tcp unknown unknown







Nmap done: 256 IP addresses (5 hosts up) scanned in 40.17 seconds

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north korea
indonesia
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united states
Britney Spears
Barrack obama
Arab Emirates
Joko Widodo
Mochatir Mohammad
Whitney Houston
Israel
Anggara Susetyaningprang
Taufan Prakasa
Pizza Hut
Cambodia
Taiwan
Sleeping
Taking Bath
Finlandia