Route Modem Internet Principle (with the application of port mapping) and network services common application protocols and corresponding standard port numbers
After 2 days of understanding, I finally made my BT speed, I posted some information together, huh, huh ~~
Route MODEM Dial Up
Many users are online by using routing modem dialing. Multiple clients and Asal Modem are connected to a switch or hub, or a machine is connected directly from the NIC and the ADSL MODEM's LAN port with the intersection. ADSL MODEM generally built-in PPPoE dial function, after the settings are set, modem power is automatically dialing to get the IP address of the public network (ADSL M ODEM settings will not be detailed here, you can refer to the relevant information). The IP address of the client is the reserved address on the InetNET, and the retention address has three forms: 10.xxx, 172.16.xx to 172.31.xx, 192.168.xx, have two ways, one is to open ADSL MODEM DHCP Service, dynamically get IP, or specify an IP address of a local area network address of ADSL Modem in the same network segment.
ADSL MDOEM is a built-in NAT function to achieve a multi-machine shared Internet, and the settings for NAT rules are generally comparable to the comparison NAPT rules. We want to improve the speed of the BT, and set the NAT rules to make the external network can be directly connected to the intranet machine.
For example, after entering the setup page of the ADSL MODEM, select the Service page, then select "Nat Rule Entry" in the NAT Options drop-down box, press the "Add" button in the NAT Rules Settings page, then The "NAT Rules - Add" window pops up.
In this page, "Rule Flavor" item selects "BIMAP", "Rule ID" column to fill in 1, "IP Name" column "all", in the "local address" column, fill in you to carry out BT Download the IP of the machine, "submit" can complete the addition of the rule. Note that if you have a NAT rule that has a rule number in your ADSL MODEM, you must first delete it, then add the same rule, just make it the rule ID is no longer 1. In this way, we add a BIMAP new NAT rule to the IP address of 192.168.1.3 in the ADSL Modem to make it transparently mapped to the Internet.
After saving, the IP address is 192.168.1.3 machine BT download speed can basically reach the limit download speed of Modem. Other machines can also refer to the settings, which is no longer detailed here.
After the above setting, your computer is in the BT download, "it is rushing"!
Word tips
Port mapping: Similar to the concept of "function" in mathematics is to map the gateway port of the shared Internet server to a client port in the LAN, so that the internal network users can access their own machines through the port mapping.
NAT-network address translator: His referred to as port mapping (also called network address conversion), implementing mutual conversion between internal IP addresses and public network IP addresses, which is to forward requests for the specified port to the specified On the IP, let other machines respond to these requests, and the intranet is sent to the external network to randomly assign ports like other gateway services, but the port specified above.
BIMAP Rules: BIMAP rules can be used to provide external network access LAN devices, using this way to completely transparently transparently to the iP of the public network, such many complex applications such as MSN voice, online games This PC is running normally. "Network Service Universal Application Protocol and Corresponding Standard (Default) Port number:"
Application agreement??? Port number / agreement ??? Description
FTP-DATA?????? ftp, data
FTP??????? ftp. Control
Telnet?????? 23 / TCP?
SMTP????? sIMPLE Mail Transfer Protocol
Time????????????????????????????????????????????????????????????????? Timserver?
Time???? 37 / udp????????
domain???? 53 / tcp?????? Domain Name Server
domain???? 53 / udp?????? Domain Name Server
TFTP???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? Trivial File Transfer
Gopher???? 70 / tcp?
HTTP??????????????????? WWW-http world???
POP3?????? Post Office Protocol-Version 3
NNTP???? 119 / tcp??? NetWork News Transfer Protocol
NetBIOS-NS?? 137 / TCP?? Netbios Name Service
NetBIOS-NS?? 137 / udp??? NetBIOS Name Service
NetBIOS-DGM?? 138 / udp?? NetBIOS DataGram Service
NetBIOS-SSN?? 139 / TCP??? Netbios Session Service
IMAP???????????? Internet Message Access Protocol
SNMP???? 161 / udp??
SNMPTRAP??? 162 / udp?? SNMP TRAP
IRC???? 194 / TCP?? Internet Relay Chat Protocol
IPX???? 213 / udp?? ipx over ip
LDAP???? 389 / tcp?? Lightweight Directory Access Protocol
HTTPS????? 443 / TCP?
HTTPS????? 443 / udp?
UUCP????? 540 / TCP?
LDAPS???? 636 / tcp??? LDAP over TLS / SSL
doom?????? 666 / tcp??? Doom Id Software
Doom???? 666 / udp?? Doom ID Software
Phone??? 1167 / udp?? Conference Calling
MS-SQL-S??? 1433 / TCP?? Microsoft-SQL-Server
MS-SQL-S?? 1433 / udp?? Microsoft-SQL-ServerMs-SQL-M??? 1434 / TCP??? Microsoft-SQL-Monitor
MS-SQL-M??? 1434 / udp?? Microsoft-SQL-Monitor
Wins???? 1512 / TCP?? Microsoft Windows Internet Name Service
WINS??? 1512 / udp?? Microsoft Windows Internet Name Service
L2TP???? 1701 / udp?? Layer Two Tunnely Protocol
?????? 1720 / TCP
QiCQ??? 4000 / UDP
QiCQ??? 8000 / UDP
QQ??????? 1080 / UDP????? Socks proxy
"Trojan's common connection port"
The common connection ports commonly used by Trojans, such as TCP135, 139, 445, 3389, 5000, etc. We are called sensitive ports, and the "Ice" is used frequently with 7626 ports, "Guangwai girls" often use 6267 ports.
"VPN uses port:"
L2TP?? 1701 / udp #layer two tunneling protocol
PPTP?? 1723 / TCP # Point-to-Point Tunnelling Protocol
"Port Control Software PCANywhere Used"
Its "controlled" uses two ports, data ports (5631), and status ports (5632).
"BT download used port"
The BT default port is 6881, 6882, 6883 ..... 6889 TCP connection (each download only uses one port, sequentially assigned)
"Set up CS Server"
Specifies the game connection port to 27016.
