Broken IP addresses in Plesk when 600+ addresses are added to a single interface

Symptoms

• After adding IP addresses, some of them are missing in the interface file.

• Missing addresses, as well as some existing ones, are shown in Tools & Settings > IP Addresses as broken.

• Repair button does not resolve the error.

• Around 600 addresses are added to one interface.

Cause

Plesk bug #PPPM-8260 which is planned to be fixed in future product updates.

Resolution

Until the bug is fixed, the following workaround can be used for Plesk Onyx 17.5 on RHEL 7/CentOS 7/CloudLinux 7:

1. Connect to the server via SSH.

2. Download and unpack attached fix:

   # wget https://plesk.zendesk.com/hc/article_attachments/360003173854/ifmng.zip && unzip ifmng.zip

3. Backup the original file and replace it with the patched one:

   # mv /usr/local/psa/admin/sbin/ifmng /usr/local/psa/admin/sbin/ifmng.orig && cp ifmng /usr/local/psa/admin/sbin/ifmng && chmod 750 /usr/local/psa/admin/sbin/ifmng

4. Repair broken IP addresses via Plesk interface.