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INCOMPATIBILITIES:
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- The REJECT target has an '--reject-with admin-prohib' option which used
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with kernels that do not support it, will result in a plain DROP instead
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of REJECT. Use with caution.
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Kernels that do support it:
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2.4 - since 2.4.22-pre9
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2.6 - all
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- There are some issues related to upgrading from 1.2.x to 1.3.x on a system
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with dynamic ruleset changes during runtime. (Please see
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https://bugzilla.netfilter.org/bugzilla/show_bug.cgi?id=334).
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After upgrading from 1.2 to 1.3, it suggest go do an iptables-save, then
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iptables-restore to ensure your dynamic rule changes continue to work.
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