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11 March 2012

Memperkecil delay ping dan DNS resolve

Tujuan :
  • Memperkecil delay ping dari sisi klien ke arah Internet.
  • Mempercepat resolving hostname ke ip address.
Asumsi : Klien-klien berada pada subnet 10.10.10.0/28
  1. Memanipulasi Type of Service untuk ICMP Packet :
    > ip firewall mangle add chain=prerouting src-address=10.10.10.0/28 protocol=icmp action=mark-connection new-connection-mark=ICMP-CM passthrough=yes
    > ip firewall mangle add chain=prerouting connection-mark=ICMP-CM action=mark-packet new-packet-mark=ICMP-PM passthrough=yes
    > ip firewall mangle add chain=prerouting packet-mark=ICMP-PM action=change-tos new-tos=min-delay
  2. Memanipulasi Type of Service untuk DNS Resolving :
    > ip firewall mangle add chain=prerouting src-address=10.10.10.0/28 protocol=tcp dst-port=53 action=mark-connection new-connection-mark=DNS-CM passthrough=yes
    > ip firewall mangle add chain=prerouting src-address=10.10.10.0/28 protocol=udp dst-port=53 action=mark-connection new-connection-mark=DNS-CM passthrough=yes
    > ip firewall mangle add chain=prerouting connection-mark=DNS-CM action=mark-packet new-packet-mark=DNS-PM passthrough=yes
    > ip firewall mangle add chain=prerouting packet-mark=DNS-PM action=change-tos new-tos=min-delay
  3. Menambahkan Queue Type :
    > queue type add name=”PFIFO-64″ kind=pfifo pfifo-limit=64
  4. Mengalokasikan Bandwidth untuk ICMP Packet :
    > queue tree add name=ICMP parent=INTERNET packet-mark=ICMP-PM priority=1 limit-at=8000 max-limit=16000 queue=PFIFO-64
  5. Mengalokasikan Bandwidth untuk DNS Resolving :
    > queue tree add name=DNS parent=INTERNET packet-mark=DNS-PM priority=1 limit-at=8000 max-limit=16000 queue=PFIFO-64
  6. Good Luck!!

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