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Home Documentation Junos OS Junos CLI Reference CLI Reference D

Junos CLI Reference

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Junos CLI Reference
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dns

date_range 20-Nov-23
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Syntax

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dns {
    disable;
    doctoring (none | sanity-check);
    maximum-message-length bytes;
    oversize-message-drop;
    traceoptions {
        flag {
            all {
                extensive
            }
        }
    }
}

Hierarchy Level

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[edit logical-systems name security alg],
[edit logical-systems name tenants name security alg],
[edit security alg],
[edit services alg],
[edit tenants name security alg]

Description

Specify the Domain Name System (DNS) Application Layer Gateway (ALG) on the device.

Options

  • disable—Disable the DNS ALG. By default, the DNS ALG is enabled. You can enable or disable the DNS ALG for both IPv4 and IPv6 mode.

  • doctoring—Configure DNS ALG doctoring.

    • none— Disable all DNS ALG doctoring.

    • sanity-check—Perform only DNS ALG sanity checks.

  • maximum-message-length—Set maximum message length (bytes).

    Range: 512 through 819.

    Default: 512.

  • oversize-message-drop—Configure to drop the oversized DNS packets.

  • traceoptions— Configure DNS ALG tracing options.

    • flag—Trace operation to perform.

      • all—Trace all events.

      • extensive—Display extensive amount of data.

Required Privilege Level

security—To view this statement in the configuration.

security-control—To add this statement to the configuration.

Release Information

Statement introduced in Junos OS Release 8.5.

The tenant option is introduced in Junos OS Release 18.3R1.

Related Documentation

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