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firewall: Reject outgoing TCP connections to port 25 by default

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This will affect new IPFire installations only, implementing a
long-standing BCP for preemptively combating botnet spam. Reject is
chosen over drop to reduce the likelihood for confusion during network
troubleshooting.

Cc: Michael Tremer <michael.tremer@ipfire.org>
Signed-off-by: Peter Müller <peter.mueller@ipfire.org>
Tested-by: Peter Müller <peter.mueller@ipfire.org>
This commit is contained in:
Peter Müller
2023-11-04 17:35:00 +00:00
parent c434310d03
commit 726c4b0f4a
2 changed files with 4 additions and 2 deletions
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1
config/firewall/config Normal file
View File

@@ -0,0 +1 @@
1,REJECT,FORWARDFW,ON,std_net_src,ALL,std_net_tgt,RED,,TCP,,,ON,,,cust_srv,SMTP,Block port 25 (TCP) for outgoing connections to the internet,,,,,,,,,,00:00,00:00,,AUTO,,dnat,,,,,second

5
lfs/configroot
View File

@@ -1,7 +1,7 @@
###############################################################################
# #
# IPFire.org - A linux based firewall #
# Copyright (C) 2007-2022 IPFire Team <info@ipfire.org> #
# Copyright (C) 2007-2023 IPFire Team <info@ipfire.org> #
# #
# This program is free software: you can redistribute it and/or modify #
# it under the terms of the GNU General Public License as published by #
@@ -64,7 +64,7 @@ $(TARGET) :
for i in auth/users backup/include.user backup/exclude.user \
captive/settings captive/agb.txt captive/clients captive/voucher_out certs/index.txt certs/index.txt.attr ddns/config ddns/settings ddns/ipcache dhcp/settings \
dhcp/fixleases dhcp/advoptions dhcp/dhcpd.conf.local dns/settings dns/servers dnsforward/config ethernet/aliases ethernet/settings ethernet/known_nics ethernet/scanned_nics \
ethernet/wireless extrahd/scan extrahd/devices extrahd/partitions extrahd/settings firewall/settings firewall/config firewall/locationblock firewall/input firewall/outgoing \
ethernet/wireless extrahd/scan extrahd/devices extrahd/partitions extrahd/settings firewall/settings firewall/locationblock firewall/input firewall/outgoing \
fwhosts/customnetworks fwhosts/customhosts fwhosts/customgroups fwhosts/customservicegrp fwhosts/customlocationgrp fwlogs/ipsettings fwlogs/portsettings ipblocklist/modified \
ipblocklist/settings mac/settings main/hosts main/routing main/security main/settings optionsfw/settings \
ovpn/ccd.conf ovpn/ccdroute ovpn/ccdroute2 pakfire/settings portfw/config ppp/settings-1 ppp/settings-2 ppp/settings-3 ppp/settings-4 \
@@ -102,6 +102,7 @@ $(TARGET) :
cp $(DIR_SRC)/config/cfgroot/logging-settings $(CONFIG_ROOT)/logging/settings
cp $(DIR_SRC)/config/cfgroot/ethernet-vlans $(CONFIG_ROOT)/ethernet/vlans
cp $(DIR_SRC)/langs/list $(CONFIG_ROOT)/langs/
cp $(DIR_SRC)/config/firewall/config $(CONFIG_ROOT)/firewall/config
cp $(DIR_SRC)/config/firewall/convert-xtaccess /usr/sbin/convert-xtaccess
cp $(DIR_SRC)/config/firewall/convert-outgoingfw /usr/sbin/convert-outgoingfw
cp $(DIR_SRC)/config/firewall/convert-dmz /usr/sbin/convert-dmz