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CONFIG_NETFILTER_XT_TARGET_HL: 'HL' hoplimit target support

General informations

The Linux kernel configuration item CONFIG_NETFILTER_XT_TARGET_HL:

Help text

This option adds the "HL" (for IPv6) and "TTL" (for IPv4) targets, which enable the user to change the hoplimit/time-to-live value of the IP header.

While it is safe to decrement the hoplimit/TTL value, the modules also allow to increment and set the hoplimit value of the header to arbitrary values. This is EXTREMELY DANGEROUS since you can easily create immortal packets that loop forever on the network.

Hardware

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