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6 strategies for firewall settings – Lancom Systems LCOS 3.50 User Manual

Page 134

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LANCOM Reference Manual LCOS 3.50

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Chapter 8: Firewall

134

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SNMP: Generic trap = enterpriseSpecific (6)

SNMP: Specific trap = 26 (0x1A)

SNMP: Time stamp = 1442 (0x5A2)

System descriptor

SNMP: OID = 1.3.6.1.2.1.1.1.0 1.

SNMP: String Value = LANCOM Business 6021 2.80.0001 /

23.09.2002 8699.000.036

Device string

SNMP: OID = 1.3.6.1.2.1.1.5.0 2. System-Name

SNMP: String Value = LANCOM Business 6021

Time stamp

SNMP: OID = 1.3.6.1.4.1.2356.400.1.6021.1.10.26.1.2.1 3.

SNMP: String Value = 9/23/2002 17:56:57

Source address

SNMP: OID = 1.3.6.1.4.1.2356.400.1.6021.1.10.26.1.3.1 3.

SNMP: IP Address = 10.0.0.37

Destination address

SNMP: OID = 1.3.6.1.4.1.2356.400.1.6021.1.10.26.1.4.1 4.

SNMP: IP Address = 192.168.200.10

Protocol (6 = TCP)

SNMP: OID = 1.3.6.1.4.1.2356.400.1.6021.1.10.26.1.5.1 5.

SNMP: Integer Value = 6 (0x6) TCP

Source port

SNMP: OID = 1.3.6.1.4.1.2356.400.1.6021.1.10.26.1.6.1 6.

SNMP: Integer Value = 4353 (0x1101)

Destination port
(80 = HTTP)

SNMP: OID = 1.3.6.1.4.1.2356.400.1.6021.1.10.26.1.7.1 7.

SNMP: Integer Value = 80 (0x50)

Name of the filter
rule

SNMP: OID = 1.3.6.1.4.1.2356.400.1.6021.1.10.26.1.8.1 8.

SNMP: String Value = BLOCKHTTP

This trap and all different in the LANCOM generated traps are sent to
all manually configured trap receivers, just like to each registered
LANmonitor, which can evaluate this and possibly all other traps.

8.3.6

Strategies for Firewall settings

Firewalls are the interface between networks, and they restrict to a smaller or
larger extent an unhindered data exchange. Thus Firewalls have opposite
objectives than networks, although they are a part of them: networks should
connect workstations, Firewalls should prevent the connection.