Linux netmap1/7/2024 PROTO (Optional - protocol-number-or-name Only packets specifying this protocol will have their IP header modified. It specifies a SOURCE network for DNAT rules and a DESTINATON NET2 - network-address Network in CIDR format NET3 - network-address Optional - added in Shorewall 4.4.11. For example, ppp0 in this file will matchĪ shorewall6-interfaces (8) entry that defines Shorewall allows loose matches to wildcard entries in shorewall6-interfaces (5). The interface must be defined in shorewall6-interfaces (5). INTERFACE - interface The name of a network interface. Beginning in Shorewall6 4.4.24, exclusion is supported. If SNAT:O, traffic originating on the firewall and leaving via INTERFACE with a source address in NET1 has it's source address rewritten to the If SNAT:P, traffic entering via INTERFACE with a destination address in NET1 has it's source address rewritten to the corresponding address in NET2. If DNAT:P, traffic entering via INTERFACE and addressed to NET1 has its destination address rewritten to the corresponding address in NET2. If DNAT:O, traffic originating on the firewall and leaving via INTERFACE and addressed to NET1 has its destination address rewritten to the corresponding If SNAT:T, traffic leaving INTERFACE with a source address in NET1 has it's source address rewritten to the corresponding address in NET2. If DNAT:P, traffic entering INTERFACE and addressed to NET1 has its destination address rewritten to the corresponding address in NET2. Stateless NAT requires Rawpost Table support in your kernel and iptables (see the TYPE - Must be DNAT or SNAT followed by :P, :O or :T to perform stateless NAT. The columns in the file are as follows (where the column name is followed by a different name in parentheses, the different name is used in the alternate To use this file, your kernel and ip6tables must have RAWPOST table support included. This file is used to map addresses in one network to corresponding addresses in a second network.
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