mercredi 4 novembre 2009

CIDR - network classless

Quelques données bien utiles, pour le réseaux au jour le jour.


TABLEAU PAR NETMASK

    Netmask              Netmask (binary)                 CIDR     Notes   
    _____________________________________________________________________________
    255.255.255.255  11111111.11111111.11111111.11111111  /32  Host (single addr)
    255.255.255.254  11111111.11111111.11111111.11111110  /31  Unuseable
    255.255.255.252  11111111.11111111.11111111.11111100  /30    2  useable
    255.255.255.248  11111111.11111111.11111111.11111000  /29    6  useable
    255.255.255.240  11111111.11111111.11111111.11110000  /28   14  useable
    255.255.255.224  11111111.11111111.11111111.11100000  /27   30  useable
    255.255.255.192  11111111.11111111.11111111.11000000  /26   62  useable
    255.255.255.128  11111111.11111111.11111111.10000000  /25  126  useable
    255.255.255.0    11111111.11111111.11111111.00000000  /24 "Class C" 254 useable

    255.255.254.0    11111111.11111111.11111110.00000000  /23    2  Class C's
    255.255.252.0    11111111.11111111.11111100.00000000  /22    4  Class C's
    255.255.248.0    11111111.11111111.11111000.00000000  /21    8  Class C's
    255.255.240.0    11111111.11111111.11110000.00000000  /20   16  Class C's
    255.255.224.0    11111111.11111111.11100000.00000000  /19   32  Class C's
    255.255.192.0    11111111.11111111.11000000.00000000  /18   64  Class C's
    255.255.128.0    11111111.11111111.10000000.00000000  /17  128  Class C's
    255.255.0.0      11111111.11111111.00000000.00000000  /16  "Class B"
       
    255.254.0.0      11111111.11111110.00000000.00000000  /15    2  Class B's
    255.252.0.0      11111111.11111100.00000000.00000000  /14    4  Class B's
    255.248.0.0      11111111.11111000.00000000.00000000  /13    8  Class B's
    255.240.0.0      11111111.11110000.00000000.00000000  /12   16  Class B's
    255.224.0.0      11111111.11100000.00000000.00000000  /11   32  Class B's
    255.192.0.0      11111111.11000000.00000000.00000000  /10   64  Class B's
    255.128.0.0      11111111.10000000.00000000.00000000  /9   128  Class B's
    255.0.0.0        11111111.00000000.00000000.00000000  /8   "Class A"
   
    254.0.0.0        11111110.00000000.00000000.00000000  /7
    252.0.0.0        11111100.00000000.00000000.00000000  /6
    248.0.0.0        11111000.00000000.00000000.00000000  /5
    240.0.0.0        11110000.00000000.00000000.00000000  /4
    224.0.0.0        11100000.00000000.00000000.00000000  /3
    192.0.0.0        11000000.00000000.00000000.00000000  /2
    128.0.0.0        10000000.00000000.00000000.00000000  /1
    0.0.0.0          00000000.00000000.00000000.00000000  /0   IP space

TABLEAU PAR CLASSES
                                    Net     Host    Total
    Net      Addr                      Addr    Addr    Number
    Class   Range      NetMask         Bits    Bits   of hosts
    ----------------------------------------------------------
    A        0-127    255.0.0.0         8      24     16777216   (i.e. 114.0.0.0)
    B      128-191    255.255.0.0      16      16        65536   (i.e. 150.0.0.0)
    C      192-254    255.255.255.0    24       8          256   (i.e. 199.0.0.0)
    D      224-239    (multicast)
    E      240-255    (reserved)
    F      208-215    255.255.255.240  28       4           16
    G      216/8      ARIN - North America
    G      217/8      RIPE NCC - Europe
    G      218-219/8  APNIC
    H      220-221    255.255.255.248  29       3            8   (reserved)
    K      222-223    255.255.255.254  31       1            2   (reserved)
    (ref: RFC1375 & http://www.iana.org/assignments/ipv4-address-space )
    (               http://www.iana.org/numbers.htm                    )
    ----------------------------------------------------------

LISTE DES PREFIXES

    The current list of special use prefixes:
          - 0.0.0.0/8      
          - 127.0.0.0/8
          - 192.0.2.0/24
          - 10.0.0.0/8
          - 172.16.0.0/12
          - 192.168.0.0/16
          - 169.254.0.0/16
          - all D/E space

   
    (ref: RFC1918 http://www.rfc-editor.org/rfc/rfc1918.txt   )
    (       or     ftp://ftp.isi.edu/in-notes/rfc1918.txt     )
    (rfc search:   http://www.rfc-editor.org/rfcsearch.html   )
    (              http://www.ietf.org/ietf/1id-abstracts.txt )
    (              http://www.ietf.org/shadow.html            )


MARTIANS SOURCES IP: FILTER CISCO


    Voici une liste des addresses IP sources que l'on devrait ne jamais voir
    venir sur les routeurs public.

    Martians: (updates at: www.iana.org/assignments/ipv4-address-space )
    no ip source-route
    access-list 100 deny   ip host 0.0.0.0 any
    deny ip 0.0.0.0         0.255.255.255  any log  ! antispoof
    deny ip 0.0.0.0 0.255.255.255  0.0.0.0 255.255.255.255 ! antispoof
    deny ip any             255.255.255.128 0.0.0.127 ! antispoof
    deny ip host            0.0.0.0        any log  ! antispoof
    deny ip host            [router intf]  [router intf] ! antispoof
    deny ip xxx.xxx.xxx.0   0.0.0.255      any log  ! lan area
    deny ip 0/8             0.255.255.255  any log  ! IANA - Reserved
    deny ip 1/8             0.255.255.255  any log  ! IANA - Reserved
    deny ip 2/8             0.255.255.255  any log  ! IANA - Reserved
    deny ip 5/8             0.255.255.255  any log  ! IANA - Reserved
    deny ip 7/8             0.255.255.255  any log  ! IANA - Reserved
    deny ip 10.0.0.0        0.255.255.255  any log  ! IANA - Private Use
    deny ip 23/8            0.255.255.255  any log  ! IANA - Reserved
    deny ip 27/8            0.255.255.255  any log  ! IANA - Reserved
    deny ip 31/8            0.255.255.255  any log  ! IANA - Reserved
    deny ip 36-37/8         0.255.255.255  any log  ! IANA - Reserved
    deny ip 39/8            0.255.255.255  any log  ! IANA - Reserved
    deny ip 41-42/8         0.255.255.255  any log  ! IANA - Reserved
    deny ip 50/8            0.255.255.255  any log  ! IANA - Reserved
    deny ip 58-60/8         0.255.255.255  any log  ! IANA - Reserved
    deny ip 69-79/8         0.255.255.255  any log  ! IANA - Reserved
    deny ip 82-95/8         0.255.255.255  any log  ! IANA - Reserved
    deny ip 96-126/8        0.255.255.255  any log  ! IANA - Reserved
    deny ip 127/8           0.255.255.255  any log  ! IANA - Reserved
    deny ip 169.254.0.0     0.0.255.255    any log  ! link-local network
    deny ip 172.16.0.0      0.15.255.255   any log  ! reserved
    deny ip 192.168.0.0     0.0.255.255    any log  ! reserved
    deny ip 192.0.2.0       0.0.0.255      any log  ! test network
    deny ip 197/8           0.255.255.255  any log  ! IANA - Reserved
    deny ip 220/8           0.255.255.255  any log  ! IANA - Reserved
    deny ip 222-223/8       0.255.255.255  any log  ! IANA - Reserved
    deny ip 224.0.0.0       31.255.255.255 any log  ! multicast
    deny ip 224.0.0.0       15.255.255.255 any log  ! unless MBGP-learned routes
    deny ip 224-239/8       0.255.255.255  any log  ! IANA - Multicast
    deny ip 240-255/8       0.255.255.255  any log  ! IANA - Reserved

FILTERED SOURCE ADDRESSES

    filtered source addresses
    0/8                 ! broadcast
    10/8                ! RFC 1918 private
    127/8               ! loopback
    169.254.0/16        ! link local
    172.16.0.0/12       ! RFC 1918 private
    192.0.2.0/24        ! TEST-NET
    192.168.0/16        ! RFC 1918 private
    224.0.0.0/4         ! class D multicast
    240.0.0.0/5         ! class E reserved
    248.0.0.0/5         ! reserved
    255.255.255.255/32  ! broadcast

ARIN ADMINISTRATED BLOCKS

    ARIN administrated blocks: (http://www.arin.net/regserv/IPStats.html)
    24.0.0.0/8 (portions of)
    63.0.0.0/8
    64.0.0.0/8
    65.0.0.0/8
    66.0.0.0/8
    196.0.0.0/8
    198.0.0.0/8
    199.0.0.0/8
    200.0.0.0/8
    204.0.0.0/8
    205.0.0.0/8
    206.0.0.0/8
    207.0.0.0/8
    208.0.0.0/8
    209.0.0.0/8
    216.0.0.0/8
    ----------------------------------------------------------

LIENS PORT/PROTOCOL

    well known ports: (rfc1700.txt)
    www.iana.org/assignments/port-numbers

    protocol numbers:
    www.iana.org/assignments/protocol-numbers
    www.iana.org/numbers.htm

CODES ICMP

    ICMP(Types/Codes)
    Testing Destination Reachability & Status
    (0/0)  Echo-Reply
    (8/0)  Echo
    Unreachable Destinations
    (3/0)  Network Unreachable
    (3/1)  Host Unreachable
    (3/2)  Protocol Unreachable
    (3/3)  Port Unreachable
    (3/4)  Fragmentaion Needed and DF set (Pkt too big)
    (3/5)  Source Route Failed
    (3/6)  Network Unknown
    (3/7)  Host Unknown
    (3/9)  DOD Net Prohibited
    (3/10) DOD Host Prohibited
    (3/11) Net TOS Unreachable
    (3/12) Host TOS Unreachable
    (3/13) Administratively Prohibited
    (3/14) Host Precedence Unreachable
    (3/15) Precedence Unreachable
    Flow Control
    (4/0)  Source-Quench [RFC 1016]
    Route Change Requests from Gateways
    (5/0)  Redirect Datagrams for the Net
    (5/1)  Redirect Datagrams for the Host
    (5/2)  Redirect Datagrams for the TOS and Net
    (5/3)  Redirect Datagrams for the TOS and Host
    Router
    (6/-)  Alternate-Address
    (9/0)  Router-Advertisement
    (10/0) Router-Solicitation
    Detecting Circular or Excessively Long Routes
    (11/0) Time to Live Count Exceeded
    (11/1) Fragment Reassembly Time Exceeded
    Reporting Incorrect Datagram Headers
    (12/0) Parameter-Problem
    (12/1) Option Missing
    (12/2) No Room for Option
    Clock Synchronization and Transit Time Estimation
    (13/0) Timestamp-Request
    (14/0) Timestamp-Reply
    Obtaining a Network Address (RARP Alternative)
    (15/0) Information-Request
    (16/0) Information-Reply
    Obtaining a Subnet Mask [RFC 950]
    (17/0) Address Mask-Request
    (18/0) Address Mask-Reply
    Other
    (30/0) Traceroute
    (31/0) Conversion-Error
    (32/0) Mobile-Redirect

    Ref: [RFC 792] [RFC 896] [RFC 950] [RFC 1016]
    www.cisco.com/univercd/cc/td/doc/product/lan/cat6000/sw_5_3/cofigide/qos.htm#
    19774

DECIMAL SYSTEM PREFIX

    Decimal system Prefix's
                Factor               Exponent  Prefix
    ---------------------------------------------------
    1 000 000 000 000 000 000 000 000...10^24....yotta
        1 000 000 000 000 000 000 000...10^21....zetta
            1 000 000 000 000 000 000...10^18....exa
                1 000 000 000 000 000...10^15....peta
                    1 000 000 000 000...10^12....tera
                        1 000 000 000...10^9.....giga
                            1 000 000...10^6.....mega
                                1 000...10^3.....kilo
                                100...10^2.....hecto
                                    10...10^1.....deka
                                0.1...10^-1....deci
                                0.01...10^-2....centi
                                0.001...10^-3....milli
                            0.000 001...10^-6....micro
                        0.000 000 001...10^-9....nano
                    0.000 000 000 001...10^-12...pico
                0.000 000 000 000 001...10^-15...femto
            0.000 000 000 000 000 001...10^-18...atto
        0.000 000 000 000 000 000 001...10^-21...zepto
    0.000 000 000 000 000 000 000 001...10^-24...yocto
    ---------------------------------------------------

    Convert Fahrenheit <> Celsius:
    Celsius = (Fahrenheit - 32) / 1.8
    Fahrenheit = (Celsius * 1.8) + 32


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