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Diffstat (limited to 'docs/configuration/nat/nat44.rst')
| -rw-r--r-- | docs/configuration/nat/nat44.rst | 108 |
1 files changed, 65 insertions, 43 deletions
diff --git a/docs/configuration/nat/nat44.rst b/docs/configuration/nat/nat44.rst index c660f8f4..9c1d1423 100644 --- a/docs/configuration/nat/nat44.rst +++ b/docs/configuration/nat/nat44.rst @@ -148,23 +148,35 @@ rule. * **outbound-interface** - applicable only to :ref:`source-nat`. It configures the interface which is used for the outside traffic that - this translation rule applies to. + this translation rule applies to. Interface groups, inverted + selection and wildcard, are also supported. - Example: + Examples: .. code-block:: none - set nat source rule 20 outbound-interface eth0 + set nat source rule 20 outbound-interface interface-name eth0 + set nat source rule 30 outbound-interface interface-name bond1* + set nat source rule 20 outbound-interface interface-name !vtun2 + set nat source rule 20 outbound-interface interface-group GROUP1 + set nat source rule 20 outbound-interface interface-group !GROUP2 + * **inbound-interface** - applicable only to :ref:`destination-nat`. It configures the interface which is used for the inside traffic the - translation rule applies to. + translation rule applies to. Interface groups, inverted + selection and wildcard, are also supported. Example: .. code-block:: none - set nat destination rule 20 inbound-interface eth1 + set nat destination rule 20 inbound-interface interface-name eth0 + set nat destination rule 30 inbound-interface interface-name bond1* + set nat destination rule 20 inbound-interface interface-name !vtun2 + set nat destination rule 20 inbound-interface interface-group GROUP1 + set nat destination rule 20 inbound-interface interface-group !GROUP2 + * **protocol** - specify which types of protocols this translation rule applies to. Only packets matching the specified protocol are NATed. @@ -323,7 +335,7 @@ demonstrate the following configuration: .. code-block:: none - set nat source rule 100 outbound-interface 'eth0' + set nat source rule 100 outbound-interface interface-name 'eth0' set nat source rule 100 source address '192.168.0.0/24' set nat source rule 100 translation address 'masquerade' @@ -332,7 +344,9 @@ Which generates the following configuration: .. code-block:: none rule 100 { - outbound-interface eth0 + outbound-interface { + interface-name eth0 + } source { address 192.168.0.0/24 } @@ -424,19 +438,19 @@ Example: set nat destination rule 100 description 'Regular destination NAT from external' set nat destination rule 100 destination port '3389' - set nat destination rule 100 inbound-interface 'pppoe0' + set nat destination rule 100 inbound-interface interface-name 'pppoe0' set nat destination rule 100 protocol 'tcp' set nat destination rule 100 translation address '192.0.2.40' set nat destination rule 110 description 'NAT Reflection: INSIDE' set nat destination rule 110 destination port '3389' - set nat destination rule 110 inbound-interface 'eth0.10' + set nat destination rule 110 inbound-interface interface-name 'eth0.10' set nat destination rule 110 protocol 'tcp' set nat destination rule 110 translation address '192.0.2.40' set nat source rule 110 description 'NAT Reflection: INSIDE' set nat source rule 110 destination address '192.0.2.0/24' - set nat source rule 110 outbound-interface 'eth0.10' + set nat source rule 110 outbound-interface interface-name 'eth0.10' set nat source rule 110 protocol 'tcp' set nat source rule 110 source address '192.0.2.0/24' set nat source rule 110 translation address 'masquerade' @@ -452,7 +466,9 @@ Which results in a configuration of: destination { port 3389 } - inbound-interface pppoe0 + inbound-interface { + interface-name pppoe0 + } protocol tcp translation { address 192.0.2.40 @@ -463,7 +479,9 @@ Which results in a configuration of: destination { port 3389 } - inbound-interface eth0.10 + inbound-interface { + interface-name eth0.10 + } protocol tcp translation { address 192.0.2.40 @@ -476,7 +494,9 @@ Which results in a configuration of: destination { address 192.0.2.0/24 } - outbound-interface eth0.10 + outbound-interface { + interface-name eth0.10 + } protocol tcp source { address 192.0.2.0/24 @@ -515,7 +535,7 @@ Our configuration commands would be: set nat destination rule 10 description 'Port Forward: HTTP to 192.168.0.100' set nat destination rule 10 destination port '80' - set nat destination rule 10 inbound-interface 'eth0' + set nat destination rule 10 inbound-interface interface-name 'eth0' set nat destination rule 10 protocol 'tcp' set nat destination rule 10 translation address '192.168.0.100' @@ -530,7 +550,9 @@ Which would generate the following NAT destination configuration: destination { port 80 } - inbound-interface eth0 + inbound-interface { + interface-name eth0 + } protocol tcp translation { address 192.168.0.100 @@ -546,43 +568,45 @@ Which would generate the following NAT destination configuration: This establishes our Port Forward rule, but if we created a firewall policy it will likely block the traffic. -It is important to note that when creating firewall rules that the DNAT +Firewall rules for Destination NAT +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +It is important to note that when creating firewall rules, the DNAT translation occurs **before** traffic traverses the firewall. In other words, the destination address has already been translated to 192.168.0.100. -So in our firewall policy, we want to allow traffic coming in on the -outside interface, destined for TCP port 80 and the IP address of -192.168.0.100. +So in our firewall ruleset, we want to allow traffic which previously matched +a destination nat rule. In order to avoid creating many rules, one for each +destination nat rule, we can accept all **'dnat'** connections with one simple +rule, using ``connection-status`` matcher: .. code-block:: none - set firewall name OUTSIDE-IN rule 20 action 'accept' - set firewall name OUTSIDE-IN rule 20 destination address '192.168.0.100' - set firewall name OUTSIDE-IN rule 20 destination port '80' - set firewall name OUTSIDE-IN rule 20 protocol 'tcp' - set firewall name OUTSIDE-IN rule 20 state new 'enable' + set firewall ipv4 forward filter rule 10 action accept + set firewall ipv4 forward filter rule 10 connection-status nat destination + set firewall ipv4 forward filter rule 10 state new enable This would generate the following configuration: .. code-block:: none - rule 20 { - action accept - destination { - address 192.168.0.100 - port 80 - } - protocol tcp - state { - new enable + ipv4 { + forward { + filter { + rule 10 { + action accept + connection-status { + nat destination + } + state { + new enable + } + } + } } } -.. note:: - - If you have configured the `INSIDE-OUT` policy, you will need to add - additional rules to permit inbound NAT traffic. 1-to-1 NAT ---------- @@ -610,10 +634,10 @@ and one external interface: set interfaces ethernet eth1 description 'Outside interface' set nat destination rule 2000 description '1-to-1 NAT example' set nat destination rule 2000 destination address '192.0.2.30' - set nat destination rule 2000 inbound-interface 'eth1' + set nat destination rule 2000 inbound-interface interface-name 'eth1' set nat destination rule 2000 translation address '192.168.1.10' set nat source rule 2000 description '1-to-1 NAT example' - set nat source rule 2000 outbound-interface 'eth1' + set nat source rule 2000 outbound-interface interface-name 'eth1' set nat source rule 2000 source address '192.168.1.10' set nat source rule 2000 translation address '192.0.2.30' @@ -639,7 +663,7 @@ We will use source and destination address for hash generation. .. code-block:: none - set nat destination rule 10 inbound-interface eth0 + set nat destination rule 10 inbound-interface inbound-interface eth0 set nat destination rule 10 protocol tcp set nat destination rule 10 destination port 80 set nat destination rule 10 load-balance hash source-address @@ -655,7 +679,7 @@ We will generate the hash randomly. .. code-block:: none - set nat source rule 10 outbound-interface eth0 + set nat source rule 10 outbound-interface interface-name eth0 set nat source rule 10 source address 10.0.0.0/8 set nat source rule 10 load-balance hash random set nat source rule 10 load-balance backend 192.0.2.251 weight 33 @@ -709,12 +733,10 @@ NAT Configuration set nat source rule 110 description 'Internal to ASP' set nat source rule 110 destination address '172.27.1.0/24' - set nat source rule 110 outbound-interface 'any' set nat source rule 110 source address '192.168.43.0/24' set nat source rule 110 translation address '172.29.41.89' set nat source rule 120 description 'Internal to ASP' set nat source rule 120 destination address '10.125.0.0/16' - set nat source rule 120 outbound-interface 'any' set nat source rule 120 source address '192.168.43.0/24' set nat source rule 120 translation address '172.29.41.89' |