Well known things ----------------- Following is a simple selection of well known numbers, useful when working with Ethereal. This is not intended to replace comprehensive network documentation. Ethernet addresses [RFC 1700] ----------------------------- ff:ff:ff:ff:ff:ff Broadcast, send to all nodes Ethernet type field ------------------- 0 - 45 invalid 46 - 1500 length field (Ethernet-II) 0x0800 IP(V4), internet protocol version 4 0x0806 ARP, address resolution protocol 0x8137 IPX, internet packet exchange (Novell) IP addresses ------------ 127.0.0.0 - 127.255.255.255 local loopback, should never appear on the network 224.0.0.0 - 239.255.255.255 multicasting [RFC1112], transmission to a host group 255.255.255.255 limited Broadcast, send to all nodes IP private addresses [RFC 1597] ------------------------------- The following IP addresses will not be routed, and should be used for private networks: 10.0.0.0 - 10.255.255.255 private in Class A 172.16.0.0 - 172.31.255.255 private in Class B 192.168.0.0 - 192.168.255.255 private in Class C IP address classes ------------------ 0.1.0.0 - 126.0.0.0 Class A 128.0.0.0 - 191.255.0.0 Class B 192.0.1.0 - 223.255.255.0 Class C 224.0.0.0 - 239.255.255.255 Class D 240.0.0.0 - 247.255.255.255 Class E IP protocols ------------ 1 ICMP internet control message protocol v 4 6 TCP transmission control protocol 17 UDP user datagram protocol 58 ICMPv6 internet control message protocol v 6 TCP/UDP ports [RFC 1700] ------------------------ 20 FTP-data file transfer protocol 21 FTP-ctrl file transfer protocol 22 SSH secure shell 23 Telnet telecommunications networking 25 SMTP simple mail transfer protocol 53 DNS domain name server 67 BOOTPS bootstrap protocol server / DHCP 68 BOOTPC bootstrap protocol client / DHCP 69 TFTP trivial file transfer protocol 80 HTTP hypertext transfer protocol 102 ISO-TSAP iso on tcp 110 POP3 post office protocol version 3 119 NNTP network news transfer protocol 123 NTP network time protocol 137 NETBIOS name service 138 NETBIOS datagram 139 NETBIOS session 143 IMAP interim mail access protocol v2 161 SNMP simple network management protocol 194 IRC internet relay chat protocol 389 LDAP lightweight directory access protocol 443 HTTPS http through SSL 2401 CVSPSERVER concurrent versioning system RFC References -------------- ARP RFC 826 "An Ethernet Address Resolution Protocol" BOOTP RFC 951 "BOOTSTRAP PROTOCOL (BOOTP)" CSLIP RFC 1144 "Compressing TCP/IP Headers for Low-Speed Serial Links" DHCP RFC 2131 "Dynamic Host Configuration Protocol" DNS RFC 1034,1035 "DOMAIN NAMES" FTP RFC 959 "FILE TRANSFER PROTOCOL (FTP)" HTTP RFC 2068 "Hypertext Transfer Protocol -- HTTP/1.1" ICMP RFC 792 "INTERNET CONTROL MESSAGE PROTOCOL" IMAPv4 RFC 2060 "INTERNET MESSAGE ACCESS PROTOCOL - VERSION 4rev1" IPv4 RFC 791 "INTERNET PROTOCOL" IP RFC 894 "Transmission of IP Datagrams over Ethernet Networks" IP RFC 950 "Internet Standard Subnetting Procedure" IP RFC 1112 "Host Extensions for IP Multicasting" IP RFC 1812 "Requirements for IP Version 4 Routers" MIME RFC 2045-2049 "Multipurpose Internet Mail Extensions (MIME)" NetBIOS RFC 1001,1002 "NetBIOS SERVICE ON A TCP/UDP TRANSPORT" NFS RFC 1014,1057,1094,1813 "XDR/SUN-RPC/NFS/NFSv3" NNTP RFC 977 "Network News Transfer Protocol" NTP RFC 958 "Network Time Protocol (NTP)" POP2 RFC 918 "POST OFFICE PROTOCOL" POP3 RFC 1725 "Post Office Protocol - Version 3" PPP RFC 1661 "The Point-to-Point Protocol (PPP)" PPP-MP RFC 1990 "The PPP Multilink Protocol (MP)" RARP RFC 903 "A Reverse Address Resolution Protocol" SLIP RFC 1055 "TRANSMISSION OF IP DATAGRAMS OVER SERIAL LINES: SLIP" SMTP RFC 821,822 "SIMPLE MAIL TRANSFER PROTOCOL" SNMP RFC 1157,1901-10,2271-75 "A Simple Network Management Protocol (SNMP)" UDP RFC 768 "User Datagram Protocol" URN RFC 1737 "Functional Requirements for Uniform Resource Names" URL RFC 1738 "Uniform Resource Locators (URL)" TCP RFC 793 "TRANSMISSION CONTROL PROTOCOL" TELNET RFC 854,855 "TELNET PROTOCOL SPECIFICATION" TELNET RFC 1700 see: TELNET OPTIONS TFTP RFC 783 "THE TFTP PROTOCOL (REVISION 2)" RFC 1166 "INTERNET NUMBERS" list of assigned IP addresses RFC 1700 "ASSIGNED NUMBERS" various assigned numbers, e.g. TCP/UDP ports