forked from cyphernix/arch-enemy
-
Notifications
You must be signed in to change notification settings - Fork 4
/
hardening-script.sh
520 lines (403 loc) · 19.4 KB
/
hardening-script.sh
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
#!/bin/bash
sudo ufw limit 22/tcp
sudo ufw allow 80/tcp
sudo ufw allow 443/tcp
sudo ufw default deny incoming
sudo ufw default allow outgoing
sudo ufw enable
sudo sysctl kernel.modules_disabled=1
sudo sysctl -a
sudo sysctl -A
sudo sysctl mib
sudo sysctl net.ipv4.conf.all.rp_filter
sudo sysctl -a --pattern 'net.ipv4.conf.(eth|wlan)0.arp'
cat <<EOF > /etc/host.conf
order bind,hosts
multi on
EOF
sudo cp jail.local /etc/fail2ban/
sudo systemctl enable fail2ban
sudo systemctl start fail2ban
echo "listening ports"
sudo netstat -tunlp
#!/bin/sh
# For debugging use iptables -v.
IPTABLES="/sbin/iptables"
IP6TABLES="/sbin/ip6tables"
MODPROBE="/sbin/modprobe"
RMMOD="/sbin/rmmod"
ARP="/usr/sbin/arp"
SSHPORT="22"
# Logging options.
#------------------------------------------------------------------------------
LOG="LOG --log-level debug --log-tcp-sequence --log-tcp-options"
LOG="$LOG --log-ip-options"
# Defaults for rate limiting
#------------------------------------------------------------------------------
RLIMIT="-m limit --limit 3/s --limit-burst 8"
# Unprivileged ports.
#------------------------------------------------------------------------------
PHIGH="1024:65535"
PSSH="1000:1023"
# Load required kernel modules
#------------------------------------------------------------------------------
"$MODPROBE" ip_conntrack_ftp
"$MODPROBE" ip_conntrack_irc
# Mitigate ARP spoofing/poisoning and similar attacks.
#------------------------------------------------------------------------------
# Hardcode static ARP cache entries here
# $ARP -s IP-ADDRESS MAC-ADDRESS
# Kernel configuration.
#------------------------------------------------------------------------------
# Disable IP forwarding.
# On => Off = (reset)
echo 1 > /proc/sys/net/ipv4/ip_forward
echo 0 > /proc/sys/net/ipv4/ip_forward
# Enable IP spoofing protection
for i in /proc/sys/net/ipv4/conf/*/rp_filter; do echo 1 > "$i"; done
# Protect against SYN flood attacks
echo 1 > /proc/sys/net/ipv4/tcp_syncookies
# Ignore all incoming ICMP echo requests
echo 0 > /proc/sys/net/ipv4/icmp_echo_ignore_all
# Ignore ICMP echo requests to broadcast
echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts
# Log packets with impossible addresses.
for i in /proc/sys/net/ipv4/conf/*/log_martians; do echo 1 > "$i"; done
# Don't log invalid responses to broadcast
echo 1 > /proc/sys/net/ipv4/icmp_ignore_bogus_error_responses
# Don't accept or send ICMP redirects.
for i in /proc/sys/net/ipv4/conf/*/accept_redirects; do echo 0 > "$i"; done
for i in /proc/sys/net/ipv4/conf/*/send_redirects; do echo 0 > "$i"; done
# Don't accept source routed packets.
for i in /proc/sys/net/ipv4/conf/*/accept_source_route; do echo 0 > "$i"; done
# Disable multicast routing
for i in /proc/sys/net/ipv4/conf/*/mc_forwarding; do echo 0 > "$i"; done
# Disable proxy_arp.
for i in /proc/sys/net/ipv4/conf/*/proxy_arp; do echo 0 > "$i"; done
# Enable secure redirects, i.e. only accept ICMP redirects for gateways
# Helps against MITM attacks.
for i in /proc/sys/net/ipv4/conf/*/secure_redirects; do echo 1 > "$i"; done
# Disable bootp_relay
for i in /proc/sys/net/ipv4/conf/*/bootp_relay; do echo 0 > "$i"; done
# Default policies.
#------------------------------------------------------------------------------
# Drop everything by default.
"$IPTABLES" -P INPUT DROP
"$IPTABLES" -P FORWARD DROP
"$IPTABLES" -P OUTPUT DROP
# Set the nat/mangle/raw tables' chains to ACCEPT
"$IPTABLES" -t nat -P PREROUTING ACCEPT
"$IPTABLES" -t nat -P OUTPUT ACCEPT
"$IPTABLES" -t nat -P POSTROUTING ACCEPT
"$IPTABLES" -t mangle -P PREROUTING ACCEPT
"$IPTABLES" -t mangle -P INPUT ACCEPT
"$IPTABLES" -t mangle -P FORWARD ACCEPT
"$IPTABLES" -t mangle -P OUTPUT ACCEPT
"$IPTABLES" -t mangle -P POSTROUTING ACCEPT
# Cleanup.
#------------------------------------------------------------------------------
# Delete all
"$IPTABLES" -F
"$IPTABLES" -t nat -F
"$IPTABLES" -t mangle -F
# Delete all
"$IPTABLES" -X
"$IPTABLES" -t nat -X
"$IPTABLES" -t mangle -X
# Zero all packets and counters.
"$IPTABLES" -Z
"$IPTABLES" -t nat -Z
"$IPTABLES" -t mangle -Z
# Completely disable IPv6.
#------------------------------------------------------------------------------
# Block all IPv6 traffic
# If the ip6tables command is available, try to block all IPv6 traffic.
if test -x "$IP6TABLES"; then
# Set the default policies
# drop everything
"$IP6TABLES" -P INPUT DROP 2>/dev/null
"$IP6TABLES" -P FORWARD DROP 2>/dev/null
"$IP6TABLES" -P OUTPUT DROP 2>/dev/null
# The mangle table can pass everything
"$IP6TABLES" -t mangle -P PREROUTING ACCEPT 2>/dev/null
"$IP6TABLES" -t mangle -P INPUT ACCEPT 2>/dev/null
"$IP6TABLES" -t mangle -P FORWARD ACCEPT 2>/dev/null
"$IP6TABLES" -t mangle -P OUTPUT ACCEPT 2>/dev/null
"$IP6TABLES" -t mangle -P POSTROUTING ACCEPT 2>/dev/null
# Delete all rules.
"$IP6TABLES" -F 2>/dev/null
"$IP6TABLES" -t mangle -F 2>/dev/null
# Delete all chains.
"$IP6TABLES" -X 2>/dev/null
"$IP6TABLES" -t mangle -X 2>/dev/null
# Zero all packets and counters.
"$IP6TABLES" -Z 2>/dev/null
"$IP6TABLES" -t mangle -Z 2>/dev/null
fi
# Custom user-defined chains.
#------------------------------------------------------------------------------
# LOG packets, then ACCEPT.
"$IPTABLES" -N ACCEPTLOG
"$IPTABLES" -A ACCEPTLOG -j "$LOG" "$RLIMIT" --log-prefix "ACCEPT "
"$IPTABLES" -A ACCEPTLOG -j ACCEPT
# LOG packets, then DROP.
"$IPTABLES" -N DROPLOG
"$IPTABLES" -A DROPLOG -j "$LOG" "$RLIMIT" --log-prefix "DROP "
"$IPTABLES" -A DROPLOG -j DROP
# LOG packets, then REJECT.
# TCP packets are rejected with a TCP reset.
"$IPTABLES" -N REJECTLOG
"$IPTABLES" -A REJECTLOG -j "$LOG" "$RLIMIT" --log-prefix "REJECT "
"$IPTABLES" -A REJECTLOG -p tcp -j REJECT --reject-with tcp-reset
"$IPTABLES" -A REJECTLOG -j REJECT
# Only allows RELATED ICMP types
# (destination-unreachable, time-exceeded, and parameter-problem).
# TODO: Rate-limit this traffic?
# TODO: Allow fragmentation-needed?
# TODO: Test.
"$IPTABLES" -N RELATED_ICMP
"$IPTABLES" -A RELATED_ICMP -p icmp --icmp-type destination-unreachable -j ACCEPT
"$IPTABLES" -A RELATED_ICMP -p icmp --icmp-type time-exceeded -j ACCEPT
"$IPTABLES" -A RELATED_ICMP -p icmp --icmp-type parameter-problem -j ACCEPT
"$IPTABLES" -A RELATED_ICMP -j DROPLOG
# Make It Even Harder To Multi-PING
"$IPTABLES" -A INPUT -p icmp -m limit --limit 1/s --limit-burst 2 -j ACCEPT
"$IPTABLES" -A INPUT -p icmp -m limit --limit 1/s --limit-burst 2 -j LOG --log-prefix PING-DROP:
"$IPTABLES" -A INPUT -p icmp -j DROP
"$IPTABLES" -A OUTPUT -p icmp -j ACCEPT
# Only allow the minimally required/recommended parts of ICMP. Block the rest.
#------------------------------------------------------------------------------
# TODO: This section needs a lot of testing!
# First, drop all fragmented ICMP packets (almost always malicious).
"$IPTABLES" -A INPUT -p icmp --fragment -j DROPLOG
"$IPTABLES" -A OUTPUT -p icmp --fragment -j DROPLOG
"$IPTABLES" -A FORWARD -p icmp --fragment -j DROPLOG
# Allow all ESTABLISHED ICMP traffic.
"$IPTABLES" -A INPUT -p icmp -m state --state ESTABLISHED -j ACCEPT "$RLIMIT"
"$IPTABLES" -A OUTPUT -p icmp -m state --state ESTABLISHED -j ACCEPT "$RLIMIT"
# Allow some parts of the RELATED ICMP traffic, block the rest.
"$IPTABLES" -A INPUT -p icmp -m state --state RELATED -j RELATED_ICMP "$RLIMIT"
"$IPTABLES" -A OUTPUT -p icmp -m state --state RELATED -j RELATED_ICMP "$RLIMIT"
# Allow incoming ICMP echo requests (ping), but only rate-limited.
"$IPTABLES" -A INPUT -p icmp --icmp-type echo-request -j ACCEPT "$RLIMIT"
# Allow outgoing ICMP echo requests (ping), but only rate-limited.
"$IPTABLES" -A OUTPUT -p icmp --icmp-type echo-request -j ACCEPT "$RLIMIT"
# Drop any other ICMP traffic.
"$IPTABLES" -A INPUT -p icmp -j DROPLOG
"$IPTABLES" -A OUTPUT -p icmp -j DROPLOG
"$IPTABLES" -A FORWARD -p icmp -j DROPLOG
# Selectively allow certain special types of traffic.
#------------------------------------------------------------------------------
# Allow loopback interface to do anything.
"$IPTABLES" -A INPUT -i lo -j ACCEPT
"$IPTABLES" -A OUTPUT -o lo -j ACCEPT
# Allow incoming connections related to existing allowed connections.
"$IPTABLES" -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
# Allow outgoing connections EXCEPT invalid
"$IPTABLES" -A OUTPUT -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT
# Miscellaneous.
#------------------------------------------------------------------------------
# We don't care about Milkosoft, Drop SMB/CIFS/etc..
"$IPTABLES" -A INPUT -p tcp -m multiport --dports 135,137,138,139,445,1433,1434 -j DROP
"$IPTABLES" -A INPUT -p udp -m multiport --dports 135,137,138,139,445,1433,1434 -j DROP
# Explicitly drop invalid incoming traffic
"$IPTABLES" -A INPUT -m state --state INVALID -j DROP
# Drop invalid outgoing traffic, too.
"$IPTABLES" -A OUTPUT -m state --state INVALID -j DROP
# If we would use NAT, INVALID packets would pass - BLOCK them anyways
"$IPTABLES" -A FORWARD -m state --state INVALID -j DROP
# PORT Scanners (stealth also)
"$IPTABLES" -A INPUT -m state --state NEW -p tcp --tcp-flags ALL ALL -j DROP
"$IPTABLES" -A INPUT -m state --state NEW -p tcp --tcp-flags ALL NONE -j DROP
# TODO: Some more anti-spoofing rules? For example:
# "$IPTABLES" -A INPUT -p tcp --tcp-flags ALL FIN,URG,PSH -j DROP
# "$IPTABLES" -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
# "$IPTABLES" -A INPUT -p tcp --tcp-flags SYN,FIN SYN,FIN -j DROP
"$IPTABLES" -N SYN_FLOOD
"$IPTABLES" -A INPUT -p tcp --syn -j SYN_FLOOD
"$IPTABLES" -A SYN_FLOOD -m limit --limit 2/s --limit-burst 6 -j RETURN
"$IPTABLES" -A SYN_FLOOD -j DROP
# TODO: Block known-bad IPs (see http://www.dshield.org/top10.php).
# "$IPTABLES" -A INPUT -s INSERT-BAD-IP-HERE -j DROPLOG
# Drop any traffic from IANA-reserved IPs.
#------------------------------------------------------------------------------
"$IPTABLES" -A INPUT -s 0.0.0.0/7 -j DROP
"$IPTABLES" -A INPUT -s 2.0.0.0/8 -j DROP
"$IPTABLES" -A INPUT -s 5.0.0.0/8 -j DROP
"$IPTABLES" -A INPUT -s 7.0.0.0/8 -j DROP
"$IPTABLES" -A INPUT -s 10.0.0.0/8 -j DROP
"$IPTABLES" -A INPUT -s 23.0.0.0/8 -j DROP
"$IPTABLES" -A INPUT -s 27.0.0.0/8 -j DROP
"$IPTABLES" -A INPUT -s 31.0.0.0/8 -j DROP
"$IPTABLES" -A INPUT -s 36.0.0.0/7 -j DROP
"$IPTABLES" -A INPUT -s 39.0.0.0/8 -j DROP
"$IPTABLES" -A INPUT -s 42.0.0.0/8 -j DROP
"$IPTABLES" -A INPUT -s 49.0.0.0/8 -j DROP
"$IPTABLES" -A INPUT -s 50.0.0.0/8 -j DROP
"$IPTABLES" -A INPUT -s 77.0.0.0/8 -j DROP
"$IPTABLES" -A INPUT -s 78.0.0.0/7 -j DROP
"$IPTABLES" -A INPUT -s 92.0.0.0/6 -j DROP
"$IPTABLES" -A INPUT -s 96.0.0.0/4 -j DROP
"$IPTABLES" -A INPUT -s 112.0.0.0/5 -j DROP
"$IPTABLES" -A INPUT -s 120.0.0.0/8 -j DROP
"$IPTABLES" -A INPUT -s 169.254.0.0/16 -j DROP
"$IPTABLES" -A INPUT -s 172.16.0.0/12 -j DROP
"$IPTABLES" -A INPUT -s 173.0.0.0/8 -j DROP
"$IPTABLES" -A INPUT -s 174.0.0.0/7 -j DROP
"$IPTABLES" -A INPUT -s 176.0.0.0/5 -j DROP
"$IPTABLES" -A INPUT -s 184.0.0.0/6 -j DROP
"$IPTABLES" -A INPUT -s 192.0.2.0/24 -j DROP
"$IPTABLES" -A INPUT -s 197.0.0.0/8 -j DROP
"$IPTABLES" -A INPUT -s 198.18.0.0/15 -j DROP
"$IPTABLES" -A INPUT -s 223.0.0.0/8 -j DROP
"$IPTABLES" -A INPUT -s 224.0.0.0/3 -j DROP
# Selectively allow certain outbound connections, block the rest.
#------------------------------------------------------------------------------
# Allow outgoing DNS requests. Few things will work without this.
"$IPTABLES" -A OUTPUT -m state --state NEW -p udp --dport 53 -j ACCEPT
"$IPTABLES" -A OUTPUT -m state --state NEW -p tcp --dport 53 -j ACCEPT
# Allow outgoing HTTP requests. Unencrypted, use with care.
"$IPTABLES" -A OUTPUT -m state --state NEW -p tcp --dport 80 -j ACCEPT
# Allow outgoing HTTPS requests.
"$IPTABLES" -A OUTPUT -m state --state NEW -p tcp --dport 443 -j ACCEPT
# Allow outgoing SMTPS requests. Do NOT allow unencrypted SMTP!
# "$IPTABLES" -A OUTPUT -m state --state NEW -p tcp --dport 465 -j ACCEPT
# Allow outgoing "submission" (RFC 2476) requests.
"$IPTABLES" -A OUTPUT -m state --state NEW -p tcp --dport 587 -j ACCEPT
# Allow outgoing POP3S requests.
"$IPTABLES" -A OUTPUT -m state --state NEW -p tcp --dport 995 -j ACCEPT
# Allow outgoing SSH requests.
"$IPTABLES" -A OUTPUT -m state --state NEW -p tcp --dport "$SSHPORT" -j ACCEPT
# Allow outgoing FTP requests. Unencrypted, use with care.
"$IPTABLES" -A OUTPUT -m state --state NEW -p tcp --dport 21 -j ACCEPT
# Allow outgoing NNTP requests. Unencrypted, use with care.
# "$IPTABLES" -A OUTPUT -m state --state NEW -p tcp --dport 119 -j ACCEPT
# Allow outgoing NTP requests. Unencrypted, use with care.
# "$IPTABLES" -A OUTPUT -m state --state NEW -p udp --dport 123 -j ACCEPT
# Allow outgoing IRC requests. Unencrypted, use with care.
# Note: This usually needs the ip_conntrack_irc kernel module.
# "$IPTABLES" -A OUTPUT -m state --state NEW -p tcp --dport 6667 -j ACCEPT
# Allow outgoing requests to various proxies. Unencrypted, use with care.
# "$IPTABLES" -A OUTPUT -m state --state NEW -p tcp --dport 8080 -j ACCEPT
# "$IPTABLES" -A OUTPUT -m state --state NEW -p tcp --dport 8090 -j ACCEPT
# Allow outgoing DHCP requests. Unencrypted, use with care.
# TODO: This is completely untested, I have no idea whether it works!
# TODO: I think this can be tightened a bit more.
"$IPTABLES" -A OUTPUT -m state --state NEW -p udp --sport 67:68 --dport 67:68 -j ACCEPT
# Allow outgoing CVS requests. Unencrypted, use with care.
# "$IPTABLES" -A OUTPUT -m state --state NEW -p tcp --dport 2401 -j ACCEPT
# Allow outgoing MySQL requests. Unencrypted, use with care.
# "$IPTABLES" -A OUTPUT -m state --state NEW -p tcp --dport 3306 -j ACCEPT
# Allow outgoing SVN requests. Unencrypted, use with care.
# "$IPTABLES" -A OUTPUT -m state --state NEW -p tcp --dport 3690 -j ACCEPT
# Allow outgoing PLESK requests. Unencrypted, use with care.
# "$IPTABLES" -A OUTPUT -m state --state NEW -p tcp --dport 8443 -j ACCEPT
# Allow outgoing Tor (http://tor.eff.org) requests.
# Note: Do _not_ use unencrypted protocols over Tor (sniffing is possible)!
# "$IPTABLES" -A OUTPUT -m state --state NEW -p tcp --dport 9001 -j ACCEPT
# "$IPTABLES" -A OUTPUT -m state --state NEW -p tcp --dport 9002 -j ACCEPT
# "$IPTABLES" -A OUTPUT -m state --state NEW -p tcp --dport 9030 -j ACCEPT
# "$IPTABLES" -A OUTPUT -m state --state NEW -p tcp --dport 9031 -j ACCEPT
# "$IPTABLES" -A OUTPUT -m state --state NEW -p tcp --dport 9090 -j ACCEPT
# "$IPTABLES" -A OUTPUT -m state --state NEW -p tcp --dport 9091 -j ACCEPT
# Allow outgoing OpenVPN requests.
"$IPTABLES" -A OUTPUT -m state --state NEW -p udp --dport 1194 -j ACCEPT
# TODO: ICQ, MSN, GTalk, Skype, Yahoo, etc...
# Selectively allow certain inbound connections, block the rest.
#------------------------------------------------------------------------------
# Allow incoming DNS requests.
"$IPTABLES" -A INPUT -m state --state NEW -p udp --dport 53 -j ACCEPT
"$IPTABLES" -A INPUT -m state --state NEW -p tcp --dport 53 -j ACCEPT
# Allow incoming HTTP requests.
"$IPTABLES" -A INPUT -m state --state NEW -p tcp --dport 80 -j ACCEPT
# Allow incoming HTTPS requests.
"$IPTABLES" -A INPUT -m state --state NEW -p tcp --dport 443 -j ACCEPT
# Allow incoming POP3 requests.
"$IPTABLES" -A INPUT -m state --state NEW -p tcp --dport 110 -j ACCEPT
# Allow incoming IMAP4 requests.
"$IPTABLES" -A INPUT -m state --state NEW -p tcp --dport 143 -j ACCEPT
# Allow incoming POP3S requests.
"$IPTABLES" -A INPUT -m state --state NEW -p tcp --dport 995 -j ACCEPT
# Allow incoming SMTP requests.
"$IPTABLES" -A INPUT -m state --state NEW -p tcp --dport 25 -j ACCEPT
# Allow incoming SSH requests.
"$IPTABLES" -A INPUT -m state --state NEW -p tcp --dport "$SSHPORT" -j ACCEPT
# Allow incoming FTP requests.
"$IPTABLES" -A INPUT -m state --state NEW -p tcp --dport 21 -j ACCEPT
# Allow incoming NNTP requests.
# "$IPTABLES" -A INPUT -m state --state NEW -p tcp --dport 119 -j ACCEPT
# Allow incoming MySQL requests.
# "$IPTABLES" -A INPUT -m state --state NEW -p tcp --dport 3306 -j ACCEPT
# Allow incoming PLESK requests.
# "$IPTABLES" -A INPUT -m state --state NEW -p tcp --dport 8843 -j ACCEPT
# Allow incoming BitTorrent requests.
# TODO: Are these already handled by ACCEPTing established/related traffic?
# "$IPTABLES" -A INPUT -m state --state NEW -p tcp --dport 6881 -j ACCEPT
# "$IPTABLES" -A INPUT -m state --state NEW -p udp --dport 6881 -j ACCEPT
# Allow incoming nc requests.
# "$IPTABLES" -A INPUT -m state --state NEW -p tcp --dport 2030 -j ACCEPT
# "$IPTABLES" -A INPUT -m state --state NEW -p udp --dport 2030 -j ACCEPT
# Explicitly log and reject everything else.
#------------------------------------------------------------------------------
# Use REJECT instead of REJECTLOG if you don't need/want logging.
"$IPTABLES" -A INPUT -j REJECTLOG
"$IPTABLES" -A OUTPUT -j REJECTLOG
"$IPTABLES" -A FORWARD -j REJECTLOG
#------------------------------------------------------------------------------
# Testing the firewall.
#------------------------------------------------------------------------------
# You should check/test that the firewall really works, using
# iptables -vnL, nmap, ping, telnet, ...
# Appending rules : Let’s add some more IPv6 rules to our firewall.
sudo ip6tables -A INPUT -p tcp --dport "$SSHPORT" -s HOST_IPV6_IP -j ACCEPT
sudo ip6tables -A INPUT -p tcp --dport 80 -j ACCEPT
sudo ip6tables -A INPUT -p tcp --dport 21 -j ACCEPT
sudo ip6tables -A INPUT -p tcp --dport 25 -j ACCEPT
# To see the IPv6 rules with line numbers, type the following command:
sudo ip6tables -L -n --line-numbers
# Deleting rules
sudo ip6tables -D INPUT -p tcp --dport 21 -j ACCEPT
set -e
echo "Changing umask permissions..."
umask 0027
sleep 2
echo "Applying Hardened configuration files"
cat confs/etc-aide-conf > /etc/aide.conf
cat confs/etc-bash-bashrc > /etc/bash.bashrc
cat confs/etc-conf-d-wireless-regdom > /etc/conf.d/wireless-regdom
cat confs/etc-crypttab > /etc/crypttab
cat confs/etc-default-passwd > /etc/default/passwd
cat confs/etc-default-useradd > /etc/default/useradd
cat confs/etc-dhclient-conf > /etc/dhclient.conf
cat confs/etc-environment > /etc/environment
cat confs/etc-hardening-wrapper-conf > /etc/hardening-wrapper.conf
cat confs/etc-iptables-ip6tables.rules > /etc/iptables/ip6tables.rules
cat confs/etc-iptables-iptables.rules > /etc/iptables/iptables.rules
cat confs/etc-issue > /etc/issue
cat confs/etc-issue-net > /etc/issue.net
cat confs/etc-locale-conf > /etc/locale.conf
cat confs/etc-locale-gen > /etc/locale.gen
cat confs/etc-logrotate-conf > /etc/logrotate.conf
cat confs/etc-mkinitcpio-conf > /etc/mkinitcpio.conf
cat confs/etc-modprobe-d-blacklist-firewire > /etc/modprobe.d/blacklist-firewire
cat confs/etc-modprobe-d-blacklist-usb > /etc/modprobe.d/blacklist-usb
cat confs/etc-motd > /etc/motd
cat confs/etc-profile > /etc/profile
cat confs/etc-securetty > /etc/securetty
cat confs/etc-security-access-conf > /etc/security/access.conf
cat confs/etc-security-group-conf > /etc/security/group.conf
cat confs/etc-security-limits-conf > /etc/security/limits.conf
cat confs/etc-security-namespace-conf > /etc/security/namespace.conf
cat confs/etc-security-pam-env-conf > /etc/security/pam-env.conf
cat confs/etc-security-time-conf > /etc/security/time.conf
cat confs/etc-shells > /etc/shells
cat confs/etc-ssh-ssh_config > /etc/ssh/ssh_config
cat confs/etc-ssh-sshd_config > /etc/ssh/sshd_config
cat confs/etc-sudoers > /etc/sudoers
cat confs/etc-sysctl-d-05-grsecurity-conf > /etc/sysctl.d/05-grsecurity.conf
cat confs/etc-sysctl-d-10-sysctl-conf > /etc/sysctl.d/10-sysctl.conf
cat confs/etc-vconsole-conf > /etc/vconsole.conf
cat confs/etc-wpa_supplicant-wpa-supplicant-conf > /etc/wpa_supplicant/wpa-supplicant.conf
cat confs/etc-zsh-zprofile > /etc/zsh/zprofile
cat confs/etc-zsh-zshrc > /etc/zsh/zshrc
echo "Configs in correct state now..."