50 Server Config – Personal Firewall Rules
ICMP Parameters This tab allows you to configure blocking of ICMP packets.
Connect to the Internet
with ADSL (PPTP)
Setting to yes creates a pass rule named ADSL in the Outgoing tab of the firewall configuration that is needed for Internet
connections via ADSL.
The service object used in this rule amongst others implements the services and protocols listed in table 3–3, page 50.
Table 3–3 Services and protocols employed by the ADSL rule
Port Protocol Service Name Description
GRE pptp Generic Routing Encapsulation; protocol which allows an arbitrary network protocol A to be
transmitted over any other arbitrary network protocol B, by encapsulating the packets of A within
GRE packets, which in turn are contained within packets of B
1723 TCP NETBIOS-DGM Point-to-Point tunnelling protocol; control port
List 3–6 Barracuda NG Network Access Client
Parameter Description
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