v
Dynamic domain name resolution configuration example ······································································ 116
DNS proxy configuration example ·········································································································· 119
IPv6 DNS configuration examples ················································································································· 120
Static domain name resolution configuration example ··········································································· 120
Dynamic domain name resolution configuration example ······································································ 121
DNS proxy configuration example ·········································································································· 123
Troubleshooting IPv4 DNS configuration ······································································································· 125
Symptom ················································································································································ 125
Solution ·················································································································································· 125
Troubleshooting IPv6 DNS configuration ······································································································· 125
Symptom ················································································································································ 125
Solution ·················································································································································· 125
Configuring DDNS ······················································································ 126
Overview ························································································································································ 126
DDNS application ··································································································································· 126
DDNS client configuration task list ················································································································· 127
Configuring a DDNS policy ···························································································································· 127
Configuration prerequisites ···················································································································· 128
Configuration procedure ························································································································· 128
Applying the DDNS policy to an interface ······································································································ 129
Setting the DSCP value for outgoing DDNS packets ····················································································· 129
Displaying DDNS ··········································································································································· 130
DDNS configuration examples ······················································································································· 130
DDNS configuration example with www.3322.org ················································································· 130
DDNS configuration example with PeanutHull server ············································································ 131
Configuring NAT ························································································· 133
Overview ························································································································································ 133
Terminology ··········································································································································· 133
NAT types ·············································································································································· 133
NAT control ············································································································································ 134
Command and hardware compatibility ··········································································································· 134
NAT implementations ····································································································································· 134
Static NAT ·············································································································································· 134
Dynamic NAT ········································································································································· 134
NAT Server ············································································································································ 135
NAT444 ·················································································································································· 136
DS-Lite NAT444 ····································································································································· 138
NAT entries ···················································································································································· 139
NAT session entry ·································································································································· 139
EIM entry ················································································································································ 139
NO-PAT entry ········································································································································· 139
NAT444 entry ········································································································································· 139
Using NAT with other features ······················································································································· 140
VRF-aware NAT ····································································································································· 140
NAT with DNS mapping ························································································································· 140
NAT with ALG ········································································································································ 141
NAT configuration task list ····························································································································· 141
NAT configuration restrictions and guidelines ································································································ 141
Configuring static NAT ··································································································································· 142
Configuration prerequisites ···················································································································· 142
Configuring outbound one-to-one static NAT ························································································· 142
Configuring outbound net-to-net static NAT ··························································································· 142
Configuring object group-based outbound static NAT ··········································································· 143
Configuring inbound one-to-one static NAT ··························································································· 144
Configuring inbound net-to-net static NAT ····························································································· 144
Configuring object group-based inbound static NAT ·············································································· 145
Configuring dynamic NAT ······························································································································ 145
Configuration restrictions and guidelines ······························································································· 146
Configuration prerequisites ···················································································································· 146
Configuring outbound dynamic NAT ······································································································ 146
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