v
Configuring DDNS ······················································································ 116
Overview ························································································································································ 116
DDNS application ··································································································································· 116
DDNS client configuration task list ················································································································· 117
Configuring a DDNS policy ···························································································································· 117
Configuration prerequisites ···················································································································· 118
Configuration procedure ························································································································· 118
Applying the DDNS policy to an interface ······································································································ 119
Setting the DSCP value for outgoing DDNS packets ····················································································· 119
Displaying DDNS ··········································································································································· 120
DDNS configuration examples ······················································································································· 120
DDNS configuration example with www.3322.org ················································································· 120
DDNS configuration example with PeanutHull server ············································································ 121
Configuring NAT ························································································· 123
Overview ························································································································································ 123
Terminology ··········································································································································· 123
NAT types ·············································································································································· 123
NAT control ············································································································································ 124
Command and hardware compatibility ··········································································································· 124
NAT implementations ····································································································································· 124
Static NAT ·············································································································································· 124
Dynamic NAT ········································································································································· 124
NAT Server ············································································································································ 125
DS-Lite NAT444 ····································································································································· 126
NAT entries ···················································································································································· 126
NAT session entry ·································································································································· 126
EIM entry ················································································································································ 127
NO-PAT entry ········································································································································· 127
Using NAT with other features ······················································································································· 127
VRF-aware NAT ····································································································································· 127
NAT with DNS mapping ························································································································· 128
NAT with ALG ········································································································································ 128
NAT configuration task list ····························································································································· 129
Configuring static NAT ··································································································································· 129
Configuration prerequisites ···················································································································· 129
Configuring outbound one-to-one static NAT ························································································· 129
Configuring outbound net-to-net static NAT ··························································································· 130
Configuring inbound one-to-one static NAT ··························································································· 130
Configuring inbound net-to-net static NAT ····························································································· 131
Configuring dynamic NAT ······························································································································ 131
Configuration restrictions and guidelines ······························································································· 132
Configuration prerequisites ···················································································································· 132
Configuring outbound dynamic NAT ······································································································ 132
Configuring inbound dynamic NAT ········································································································ 133
Configuring NAT Server ································································································································· 134
Configuring common NAT Server ·········································································································· 134
Configuring load sharing NAT Server ···································································································· 135
Configuring ACL-based NAT Server ······································································································ 136
Configuring DS-Lite NAT444 ························································································································· 136
Configuring NAT with DNS mapping ·············································································································· 137
Configuring NAT hairpin ································································································································· 137
Configuring NAT with ALG ····························································································································· 138
Configuring NAT session logging ··················································································································· 138
Displaying and maintaining NAT ···················································································································· 138
NAT configuration examples ·························································································································· 140
Outbound one-to-one static NAT configuration example ······································································· 140
Outbound dynamic NAT configuration example (non-overlapping addresses) ······································ 141
Outbound bidirectional NAT configuration example ··············································································· 144
NAT Server for external-to-internal access configuration example ························································ 147
NAT Server for external-to-internal access through domain name configuration example ···················· 150
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