USER MANUAL - Teltonika

If you witness the above sequence, your backup link is working!FirewallIn this section we will look over the various firewall features that come with rut500.General SettingsThe routers firewall is a standard linux iptables package, which uses routing chains and policies to facilitate control overinbound and outbound traffic.Field name Sample value Explanation1. Enable SYN-floodprotectionChecked/Unchecked When checked the router becomes more resistant against SYNfloodattacks.2. Drop Invalid packets Checked/Unchecked A “Drop” action is performed on a packet that is determined to beinvalid3. Input Reject/Drop/Accept DEFAULT* action that is to be performed for packets that passthrough the Input chain.4. Output Reject/Drop/Accept DEFAULT* action that is to be performed for packets that passthrough the Output chain.5. Forward Reject/Drop/Accept DEFAULT* action that is to be performed for packets that passthrough the Forward chain.*DEFAULT: When a packet goes through a firewall chain it is matched against all the rules for that specific chain. If norule 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 sentto the source of the dropped packet.43