ELSA Cable manual Description of the menu options R99, Setup/IP-router-module/firewall

Description of the menu options R99

Table- masquerading

telnet 192.38.50.100:27

to connect directly to a news server that can be reached via a router with the IP address 192.38.50.100.

With IP masquerading, the IP addresses of computers in the local network are rendered invisible to external devices by means of a conversion of addresses and ports in the router. The dynamic masquerading table displays the IP addresses from the local network that the router is currently masking. The dynamic masquerading table can contain up to 2048 entries and has the following layout:

Intranet-addr.	S-port	Protocol	Timeout
10.1.1.10	1234	TCP	10

The different columns have the following meaning:

KIntranet-addr.: IP address of the computer in the local network

KS-port: Source port for this entry

KProtocol: Protocol used (TCP/UDP/ICMP)

KTimeout: Time in seconds until the entry is removed from the table

Setup/IP-router-module/firewall

The filters for the IP packets are set in this menu.

The IP filters are defined in a table with the following layout:

Idx.

Active

Prot

Src-address

Src-netmask

S-st.

S-end

Dst-address

WIN

YES

TCP

255.255.255.255

0.0.0.0

137

139

0.0.0.0

Dst-netmask

D-st.

D-end

Action

Ifc

Direct.

MBUcst

Matches

0.0.0.0

53

53

The table fields have the following meaning:

KIdx.

Unique index. This entry is required to distinguish the filters. The index may be four characters long and selected as desired.

Active

Activates or deactivates the filter.

KProt

Protocol that is to be filtered. Possible entries are TCP, UDP, ICMP and all.

ELSA MicroLink Cable