Firewall; General Settings - Teltonika RUT955 User Manual

RUT955 User's Manual

7.6 Firewall

In this section we will look over the various firewall features that come with RUT955.
7.6.1

General Settings

The router's firewall is a standard Linux iptables package, which uses routing chains and policies to facilitate control
over inbound and outbound traffic.
Field Name Possible values
1. Drop Invalid Checked/Unchecked A "Drop" action is performed on a packet that is determined to be invalid
packets
2. Input Reject/Drop/Accept
3. Output Reject/Drop/Accept
4. Forward Reject/Drop/Accept
*DEFAULT: When a packet goes through a firewall chain it is matched against all the rules of that specific chain. If no rule matches said packet, an according
Action (Drop, Reject or Accept) is performed
Accept – Packet gets to continue down to the next chain;
Drop – Packet is stopped and deleted;
Reject – Packet is stopped, deleted and, differently from Drop, an ICMP packet containing a message of rejection is
sent to the source of the dropped packet.
Teltonika Solutions
Explanation
DEFAULT* action that is to be performed for packets that pass through the
Input chain
DEFAULT* action that is to be performed for packets that pass through the
Output chain
DEFAULT* action that is to be performed for packets that pass through the
Forward chain
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