Overview
When performing a system update or upgrade to AlmaLinux 9.4 using the package manager, you may encounter a dependency conflict involving the iptables-libs and iptables-legacy packages. This issue occurs when the repository provides an updated library version that conflicts with legacy iptables components currently installed on the system.
Error Description
The update process will halt and display the following error message:
Error:
Problem: cannot install both iptables-libs-1.8.10-2.el9.x86_64 from baseos and iptables-libs-1.8.8-6.el9_1.x86_64 from @System
- package iptables-legacy-1.8.8-6.el9.2.x86_64 from @System requires (iptables-libs(x86-64) = 1.8.8-6.el9 or iptables-libs(x86-64) = 1.8.8-6.el9_1), but none of the providers can be installed
- cannot install the best update candidate for package iptables-libs-1.8.8-6.el9_1.x86_64
- cannot install the best update candidate for package iptables-legacy-1.8.8-6.el9.2.x86_64
(try to add '--allowerasing' to command line to replace conflicting packages or '--skip-broken' to skip uninstallable packages or '--nobest' to use not only best candidate packages)Resolution Steps
To resolve this dependency conflict, replace the deprecated legacy iptables package with the modern nftables-based compatibility layer. Follow these steps:
- Open a terminal session and ensure you have root privileges or use sudo.
- Remove the conflicting legacy package by executing the following command:
dnf remove iptables-legacy - Install the recommended replacement package by executing the following command:
dnf install iptables-nft - Rerun your original system update command to verify that the dependency conflict has been resolved and continue with the upgrade process.
Troubleshooting & Notes
- The legacy iptables package is deprecated in AlmaLinux 9. Retaining it prevents the installation of newer library versions provided by the BaseOS repository.
