BugZero | F5 BugID 1043805 - ICMP traffic over NAT does not work properly.

F5 - Defect ID: 1043805

ICMP traffic over NAT does not work properly.

F5 - Defect ID: 1043805

ICMP traffic over NAT does not work properly.

Last updated on July 18th, 2026

BugZero Risk Score
8.6 High

Overall: 8.6

Severity: 9.1

Community: 4.2

Lifecycle: 8.3

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Bug Details

Priority: 2-Critical
Status: Verified
Impact Category: Local Traffic Manager

Description

Symptoms

ICMP traffic hitting a NAT translation address is dropped and not sent further to the originating address.

Impact

ICMP traffic fails to be forwarded over the NAT.

Conditions

-- An LTM NAT is configured. -- ICMP traffic arrives.

Workaround

None

Fix Information

None

Change history

Links

Original Vendor Announcement

Relevant Products

Click on a version to see all relevant bugs

Affected versions:14.1.0, 14.1.0.1, 14.1.0.2, 14.1.0.3, 14.1.0.5, 14.1.0.6, 14.1.2, 14.1.2.1, 14.1.2.2, 14.1.2.3, 14.1.2.4, 14.1.2.5, 14.1.2.6, 14.1.2.7, 14.1.2.8, 14.1.3, 14.1.3.1, 14.1.4, 14.1.4.1, 14.1.4.2, 14.1.4.3, 14.1.4.4, 14.1.4.5, 14.1.4.6, 14.1.5, 15.1.0, 15.1.0.1, 15.1.0.2, 15.1.0.3, 15.1.0.4, 15.1.0.5, 15.1.1, 15.1.2, 15.1.2.1, 15.1.3, 15.1.3.1, 15.1.4, 15.1.4.1, 15.1.5, 15.1.5.1, 15.1.6, 15.1.6.1, 16.1.0, 16.1.1, 16.1.2, 16.1.2.1, 16.1.2.2, 16.1.3

Fixed versions: 17.0.0, 16.1.3.1, 15.1.7, 14.1.5.1

Relevant Products

Click on a version to see all relevant bugs

Fixed versions: 17.0.0, 16.1.3.1, 15.1.7, 14.1.5.1

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F5 Integration

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BugZero Plan

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F5 - Defect ID: 1043805

ICMP traffic over NAT does not work properly.

F5 - Defect ID: 1043805

ICMP traffic over NAT does not work properly.

Last updated on July 18th, 2026

BugZero Risk Score8.6 High

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

F5 - Defect ID: 1043805

ICMP traffic over NAT does not work properly.

F5 - Defect ID: 1043805

ICMP traffic over NAT does not work properly.

Last updated on July 18th, 2026

BugZero Risk Score8.6 High

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

BugZero Risk Score
8.6 High

BugZero Risk Score
8.6 High