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Baseline sysctl-17: Enable logging of martian packets #96

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Jul 8, 2017
Merged

Baseline sysctl-17: Enable logging of martian packets #96

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2 changes: 2 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,8 @@ This Puppet module provides secure configuration of your base OS with hardening.
* `enable_ipv6_forwarding = false`
true if this system requires packet forwarding in IPv6 (eg Router), false otherwise
* `enable_ipv6 = false`
* `enable_log_martians = true`
true to enable logging on suspicious / unroutable network packets, false otherwise **WARNING - this might generate huge log files!**
* `arp_restricted = true`
true if you want the behavior of announcing and replying to ARP to be restricted, false otherwise
* `extra_user_paths = []`
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2 changes: 2 additions & 0 deletions manifests/init.pp
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Expand Up @@ -54,6 +54,7 @@
$enable_core_dump = false,
$enable_stack_protection = true,
$enable_rpfilter = true,
$enable_log_martians = true,
) {

# Validate
Expand Down Expand Up @@ -132,6 +133,7 @@
enable_core_dump => $enable_core_dump,
enable_stack_protection => $enable_stack_protection,
enable_rpfilter => $enable_rpfilter,
enable_log_martians => $enable_log_martians,
}
}

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9 changes: 8 additions & 1 deletion manifests/sysctl.pp
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Expand Up @@ -23,6 +23,7 @@
$enable_core_dump = false,
$enable_stack_protection = true,
$enable_rpfilter = true,
$enable_log_martians = true,
) {

# set variables
Expand Down Expand Up @@ -161,7 +162,13 @@
sysctl { 'net.ipv4.conf.default.send_redirects': value => '0' }

# log martian packets (risky, may cause DoS)
#net.ipv4.conf.all.log_martians = 1
if $enable_log_martians {
sysctl { 'net.ipv4.conf.all.log_martians': value => '1' }
sysctl { 'net.ipv4.conf.default.log_martians': value => '1' }
} else {
sysctl { 'net.ipv4.conf.all.log_martians': value => '0' }
sysctl { 'net.ipv4.conf.default.log_martians': value => '0' }
}


# System
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