Black Box ACS120 Guida Utente Scaricare il pdf (Pagina 126)

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101

Clustering

126 BLACK BOX ® Advanced Console Server

New Parameters and Commands

A new parameter, conf.nat_clustering_ip allows you to enable or disable the clustering via the

NAT table. This parameter should be configured with the IP address used to access the serial

ports. The NAT clustering will work regardless of the interface where this IP address is

assigned to. Additionally, there are two chains (post_nat_cluster and pre_nat_cluster) that

holds all rules to perform NAT for clustering.

Abbreviation List

The Master BLACK BOX ® Advanced Console Server box will issue a series of iptables com-

mands to populate the nat table with the necessary rules to perform NAT translation for

remote ports. Two chains will be created:

• post_nat_cluster (to change the source IP address), and

• pre_nat_cluster (to change the destination IP address)

The BLACK BOX ® Advanced Console Server administrator must enable clustering via NAT in

pslave.conf (conf.nat_clustering_ip <clustering_ip>).

iptables -D PREROUTING -t nat -p tcp -j pre_nat_cluster

iptables -D POSTROUTING -t nat -p tcp -j post_nat_cluster

clustering_ip IP address of any BLACK BOX ® Advanced Console Server

interface (Master box). It is a public IP address and is the one that

must be used to connect with the Slave's serial ports.

master_ip Primary or secondary ethernet IP address of the Master box

(usually a public IP address).

slave_ip Primary or secondary ethernet IP address of the Slave box

(usually a non public IP address)

master_port Remote serial port parameter "socket_port" (configured in the

Master box).

slave_port Local serial port parameter “socket_port” (configured in the

Slave box).

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Black Box ACS120 Guida Utente Pagina 126

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