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Moxa UC-7101-T-LX Руководство по программной части онлайн [26/46] 170792
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UC-7101/7110/7112 Software User’s Manual Configuring UC-7101/7110/7112
4-4
Source NAT (SNAT)—changes the first source packet IP address
Destination NAT (DNAT)—changes the first destination packet IP address
MASQUERADE—a special form for SNAT. If one host can connect to the Internet, then
other computers that connect to this host can connect to the Internet when the computer
does not have an actual IP address.
REDIRECT—a special form of DNAT that re-sends packets to a local host independent
of the destination IP address.
C. Mangle Table—includes two chains
PREROUTING chain—pre-processes packets before the routing process.
OUTPUT chain—processes packets after the routing process.
It has three extensions—TTL, MARK, TOS.
The following figure shows the IPTABLES hierarchy.
Incoming
Packets
Mangle Table
PREROUTING Chain
NAT Table
PREROUTING Chain
NAT Table
POSTROUTING Chain
Outgoing
Packets
Other Host
Packets
Mangle Table
FORWARD Chain
Filter Table
FORWARD Chain
Mangle Table
POSTROUTING Chain
Local Host
Packets
Mangle Table
INPUT Chain
Filter Table
INPUT Chain
Local
Process
Mangle Table
OUTPUT Chain
NAT Table
OUTPUT Chain
Filter Table
OUTPUT Chain
Содержание
- Ninth edition april 2015 1
- Uc 7101 7110 7112 user s manual 1
- Www moxa com product 1
- Copyright notice 2
- Disclaimer 2
- Technical support contact information 2
- Trademarks 2
- Uc 7101 7110 7112 user s manual 2
- Www moxa com support 2
- Table of contents 3
- Introduction 5
- Overview 6
- Package checklist 6
- Hardware specifications 7
- Product features 7
- Product specifications 7
- Software specifications 8
- Getting started 9
- Connecting the uc 7101 7110 7112 to a pc 10
- Console port 10
- Powering on the uc 7101 7110 7112 10
- Telnet 11
- Configuring the ethernet interface 12
- Developing your applications 14
- Installing the uc 7101 7110 7112 tool chain 14
- Compiling hello c 15
- Uploading hello to the uc 7101 7110 7112 15
- Running hello on the uc 7101 7110 7112 16
- Sample makefile code 17
- Software package 19
- Uc 7101 7110 7112 software architecture 20
- Journaling flash file system jffs2 21
- Uc 7101 7110 7112 software package 22
- Configuring uc 7101 7110 7112 23
- Enabling and disabling daemons 24
- How to enable disable etc inittab www server 24
- How to enable disable telnet ftp server 24
- How to enable network time protocol 24
- How to update the system time periodically with network time protocol 24
- Adding a web page 25
- Iptables 25
- Define policy for chain rules 27
- Observe and erase chain rules 27
- Append or delete rules 28
- Nat example 29
- The ip addresses of all packets leaving lan1 are changed to 192 68 27 you will need to load the module ipt_masquerade 29
- Uc 7101 7110 7112 software user s manual configuring uc 7101 7110 7112 29
- Configuring dial in dial out service 30
- Connect using a modem 30
- Dial in service 30
- Dial out service 30
- Direct cable connection 30
- Enabling nat at bootup 30
- Configuring pppoe 31
- Dynamic driver module load unload 31
- How to mount a remote nfs server 31
- Upgrading the kernel 32
- Upgrading the root file system user directory 33
- Autostarting user applications on bootup 34
- Checking the kernel and root file system versions 34
- Loading factory defaults 34
- Uc 7101 7110 7112 device api 35
- Buzzer 36
- Rtc real time clock 36
- Uart interface 36
- Wdt watch dog timer 37
- Editor 41
- File manager 41
- System commands 41
- Μclinux normal command utility collection 41
- Moxa special utilities 42
- Network 42
- Process 42
- Snmp agent with mib ii rs 232 like group 43
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