SG0-001 · Question #23
In order to protect the storage area network, a new firewall has been installed at the company's datacenter. Once installed, all servers lost the remote storage and crashed. Which of the following wil
The correct answer is B. TCP port 3260 must be permitted between the two networks.. The loss of remote storage after a firewall installation indicates that the necessary iSCSI port, TCP 3260, is blocked and must be permitted to restore communication between servers and the SAN.
Question
In order to protect the storage area network, a new firewall has been installed at the company's datacenter. Once installed, all servers lost the remote storage and crashed. Which of the following will restore communication between the servers' network and the SAN?
Options
- AUDP port 6320 must be permitted between the two networks.
- BTCP port 3260 must be permitted between the two networks.
- CAll servers must be configured to use hardware iSCSI initiators.
- DAll servers must rescan the LUNs which have been masked by the firewall
How the community answered
(30 responses)- A7% (2)
- B77% (23)
- C13% (4)
- D3% (1)
Why each option
The loss of remote storage after a firewall installation indicates that the necessary iSCSI port, TCP 3260, is blocked and must be permitted to restore communication between servers and the SAN.
UDP port 6320 is not the standard port for iSCSI communication; iSCSI primarily relies on TCP port 3260.
iSCSI (Internet Small Computer System Interface) uses TCP port 3260 as its well-known port for establishing and maintaining connections between iSCSI initiators and iSCSI targets. Permitting TCP port 3260 through the new firewall is essential to restore server access to iSCSI-based remote storage.
While hardware iSCSI initiators can offer performance benefits, switching to them would not resolve a firewall blocking the iSCSI protocol port.
A firewall does not 'mask' LUNs; it blocks network traffic. Rescanning LUNs will not re-establish connectivity if the underlying network port for iSCSI communication is blocked.
Concept tested: iSCSI port requirements
Source: https://www.ibm.com/docs/en/aix/7.2?topic=protocol-ports-iscsi
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