iptables producing 'Unknown error 18446744073709551615' in RHEL 5
Issue
- Creating a large number of rules such as 50000, iptables will produce "iptables: Unknown error 18446744073709551615".
- iptables bulk updates (eg: iptables-restore) fails with return code -1
- Gives the error "kernel: allocation failed: out of vmalloc space - use vmalloc=<size> to increase size" in /var/log/messages
Environment
- RHEL 5
- kernel - 2.6.18-128.el5
- iptables-1.3.5-5.3.el5_4.1
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