Firewall; General Settings - Teltonika RUT230 User Manual

7.6 Firewall

In this section we will look over the various firewall features that come with RUT230.

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 Sample value
1. Drop Invalid Checked/Unchecked
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 for that specific chain. If
no rule matches said packet, an according Action (either Drop or Reject or Accept) is performed.
Accept – Packet gets to continue down 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.
Explanation
A "Drop" action is performed on a packet that is determined to be invalid
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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