Rule Firewall milik Dmitry di MUM 2006 tahun kemaren

loliktry

Setelah cari cari di wiki dapet juga isi firewall-nya Dmitry (Dmitry Golubev, MikroTik (Latvia) Documentation writer and expert in networking, has worked at MikroTik for four years.)

Ini hasil kopas yang diterjemahkan secara bebas dan juga beberapa penyesuaian.
Kalau bro bro / sis sis (ada ngga yah sis disini ??????) baca sumbernya disini:
http://wiki.mikrotik.com/wiki/Dmitry_on_firewalling

Komponen utama untuk menentukan firewall adalah:
* protocol classifier
* invalid packet filter
* port-scan detector
* policy classifier
* application protocol filter
* TCP-specific filters
* application protocol specific filters

Protocol Classifier
disini digunakan untuk mengklasifikasikan bebarapa port baik TCP atau UDP:

Code:

/ ip firewall mangle
add chain=prerouting protocol=tcp connection-state=new action=jump jump-target=tcp-services
add chain=prerouting protocol=udp connection-state=new action=jump jump-target=udp-services
add chain=prerouting connection-state=new action=jump jump-target=other-services

Untuk bagian TCP bisa dikelompokkan sebagai berikut:

Code:

add chain=tcp-services protocol=tcp src-port=1024-65535 dst-port=20-21 action=mark-connection new-connection-mark=ftp passthrough=no
add chain=tcp-services protocol=tcp src-port=513-65535 dst-port=22 action=mark-connection new-connection-mark=ssh passthrough=no
add chain=tcp-services protocol=tcp src-port=1024-65535 dst-port=23 action=mark-connection new-connection-mark=telnet passthrough=no
add chain=tcp-services protocol=tcp src-port=1024-65535 dst-port=25 action=mark-connection new-connection-mark=smtp passthrough=no
add chain=tcp-services protocol=tcp src-port=53 dst-port=53 action=mark-connection new-connection-mark=dns passthrough=no
add chain=tcp-services protocol=tcp src-port=1024-65535 dst-port=53 action=mark-connection new-connection-mark=dns passthrough=no
add chain=tcp-services protocol=tcp src-port=1024-65535 dst-port=80 action=mark-connection new-connection-mark=http passthrough=no
add chain=tcp-services protocol=tcp src-port=1024-65535 dst-port=110 action=mark-connection new-connection-mark=pop3 passthrough=no
add chain=tcp-services protocol=tcp src-port=1024-65535 dst-port=113 action=mark-connection new-connection-mark=auth passthrough=no
add chain=tcp-services protocol=tcp src-port=1024-65535 dst-port=119 action=mark-connection new-connection-mark=nntp passthrough=no
add chain=tcp-services protocol=tcp src-port=1024-65535 dst-port=143 action=mark-connection new-connection-mark=imap passthrough=no
add chain=tcp-services protocol=tcp src-port=1024-65535 dst-port=161-162 action=mark-connection new-connection-mark=snmp passthrough=no
add chain=tcp-services protocol=tcp src-port=1024-65535 dst-port=443 action=mark-connection new-connection-mark=https passthrough=no
add chain=tcp-services protocol=tcp src-port=1024-65535 dst-port=465 action=mark-connection new-connection-mark=smtps passthrough=no
add chain=tcp-services protocol=tcp src-port=1024-65535 dst-port=993 action=mark-connection new-connection-mark=imaps passthrough=no
add chain=tcp-services protocol=tcp src-port=1024-65535 dst-port=995 action=mark-connection new-connection-mark=pop3s passthrough=no
add chain=tcp-services protocol=tcp src-port=1024-65535 dst-port=1723 action=mark-connection new-connection-mark=pptp passthrough=no
add chain=tcp-services protocol=tcp src-port=1024-65535 dst-port=2379 action=mark-connection new-connection-mark=kgs passthrough=no
add chain=tcp-services protocol=tcp src-port=1024-65535 dst-port=3128 action=mark-connection new-connection-mark=proxy passthrough=no
add chain=tcp-services protocol=tcp src-port=1024-65535 dst-port=3389 action=mark-connection new-connection-mark=win-ts passthrough=no
add chain=tcp-services protocol=tcp src-port=1024-65535 dst-port=4242-4243 action=mark-connection new-connection-mark=emule passthrough=no
add chain=tcp-services protocol=tcp src-port=4661-4662 dst-port=1024-65535 action=mark-connection new-connection-mark=overnet passthrough=no
add chain=tcp-services protocol=tcp src-port=4711 dst-port=1024-65535 action=mark-connection new-connection-mark=emule passthrough=no
add chain=tcp-services protocol=tcp src-port=1024-65535 dst-port=5900-5901 action=mark-connection new-connection-mark=vnc passthrough=no
add chain=tcp-services protocol=tcp src-port=1024-65535 dst-port=6667-6669 action=mark-connection new-connection-mark=irc passthrough=no
add chain=tcp-services protocol=tcp src-port=1024-65535 dst-port=6881-6889 action=mark-connection new-connection-mark=bittorrent passthrough=no
add chain=tcp-services protocol=tcp src-port=1024-65535 dst-port=8080 action=mark-connection new-connection-mark=http passthrough=no
add chain=tcp-services protocol=tcp src-port=1024-65535 dst-port=8291 action=mark-connection new-connection-mark=winbox passthrough=no
add chain=tcp-services protocol=tcp action=mark-connection new-connection-mark=other-tcp passthrough=no

Untuk bagian UDP juga ga kalah banyaknya loh ^^. :

Code:

add chain=udp-services protocol=udp src-port=1024-65535 dst-port=53 action=mark-connection new-connection-mark=dns passthrough=no
add chain=udp-services protocol=udp src-port=1024-65535 dst-port=123 action=mark-connection new-connection-mark=ntp passthrough=no
add chain=udp-services protocol=udp src-port=1024-65535 dst-port=1701 action=mark-connection new-connection-mark=l2tp passthrough=no
add chain=udp-services protocol=udp src-port=1024-65535 dst-port=4665 action=mark-connection new-connection-mark=emule passthrough=no
add chain=udp-services protocol=udp src-port=1024-65535 dst-port=4672 action=mark-connection new-connection-mark=emule passthrough=no
add chain=udp-services protocol=udp src-port=4672 dst-port=1024-65535 action=mark-connection new-connection-mark=emule passthrough=no
add chain=udp-services protocol=udp src-port=1024-65535 dst-port=12053 action=mark-connection new-connection-mark=overnet passthrough=no
add chain=udp-services protocol=udp src-port=12053 dst-port=1024-65535 action=mark-connection new-connection-mark=overnet passthrough=no
add chain=udp-services protocol=udp src-port=36725 dst-port=1024-65535 action=mark-connection new-connection-mark=skype passthrough=no
add chain=udp-services protocol=udp connection-state=new action=mark-connection new-connection-mark=other-udp passthrough=no

Nah yang ga di masukkan di tipe TCP dan UDP juga dimasukkin juga di mangle:

Code:

add chain=other-services protocol=icmp icmp-options=8:0-255 action=mark-connection new-connection-mark=ping passthrough=no
add chain=other-services protocol=gre action=mark-connection new-connection-mark=gre passthrough=no
add chain=other-services action=mark-connection new-connection-mark=other passthrough=no

Nah ini ada tips trick nya Dmitry:

Code:

Note that for TCP and UDP, we check both, source port (usually, 1024-65535) and destination port. Everything else is not a valid protocol.

so biasanya yang port aman diantara port 1024 sampai 65535 asal port yang dipake oleh client.

Invalid packet filter
Untuk memudahkan packet filter, maka dibuat dulu mangle sebagai berikut:

Code:

/ip firewall mangle
add chain=prerouting in-interface=Public dst-address-list=nat-addr action=mark-packet new-packet-mark=nat-traversal passthrough=no

Kita masukkan ip local, ip yang direstricted dan ip ISP kita biar bisa masuk ke mikrotiknya (mohon disesuaikan dengan kebutuhan yahhhhh):

Code:

/ ip firewall address-list
add list=illegal-addr address=0.0.0.0/8 comment="illegal addresses"
add list=illegal-addr address=127.0.0.0/8
add list=illegal-addr address=224.0.0.0/3
add list=illegal-addr address=10.0.0.0/8
add list=illegal-addr address=172.16.0.0/12
add list=illegal-addr address=192.168.0.0/16
add list=local-addr address=192.168.1.0/24 comment="my local network"
add list=local-addr address=10.1.0.0/16 comment="my Local ISP network"
add list=local-addr address=172.31.255.0/21 comment="my Public IP network"
add list=nat-addr address=192.168.1.0/24 comment="my local network"

Di atas terlihat 3 bagian daftar ip
illegal ----> daftar ip yang aneh-aneh dan yang di restricted
local-add ---> daftar ip jaringan kita, dan ip lokal ISP, dan juga IP Public kita
nat-addr ----> daftar block ip yang di masquerade (src-nat)

Port Scan Detector dan TCP-specific filters
Di bagian Filter Firewall Rule:
Kita bypass traffic untuk jaringan internal kita:

Code:

/ ip firewall filter
add chain=forward in-interface=Local out-interface=Local action=accept comment="Allow traffic between wired and wireless networks"

Nah disini mulai kita blok port Scanner dan intrusi dari luar ke mikrotik kita:

Code:

/ ip firewall filter
add chain=forward action=jump jump-target=sanity-check comment="Sanity Check"
add chain=sanity-check packet-mark=nat-traversal action=jump jump-target=drop comment="Deny illegal NAT traversal"
add chain=sanity-check protocol=tcp psd=20,3s,3,1 action=add-src-to-address-list address-list=blocked-addr address-list-timeout=1d comment="Block port scans"
add chain=sanity-check protocol=tcp tcp-flags=fin,psh,urg,!syn,!rst,!ack action=add-src-to-address-list address-list=blocked-addr address-list-timeout=1d comment="Block TCP Null scan"
add chain=sanity-check protocol=tcp tcp-flags=!fin,!syn,!rst,!psh,!ack,!urg action=add-src-to-address-list address-list=blocked-addr address-list-timeout=1d comment="Block TCP Xmas scan"
add chain=sanity-check protocol=tcp src-address-list=blocked-addr action=jump jump-target=drop
add chain=sanity-check protocol=tcp tcp-flags=rst action=jump jump-target=drop comment="Drop TCP RST"
add chain=sanity-check protocol=tcp tcp-flags=fin,syn action=jump jump-target=drop comment="Drop TCP SYN+FIN"
add chain=sanity-check connection-state=invalid action=jump jump-target=drop comment="Dropping invalid connections at once"
add chain=sanity-check connection-state=established action=accept comment="Accepting already established connections"
add chain=sanity-check connection-state=related action=accept comment="Also accepting related connections"
add chain=sanity-check dst-address-type=broadcast,multicast action=jump jump-target=drop comment="Drop all traffic that goes to multicast or broadcast addresses"
add chain=sanity-check in-interface=Local dst-address-list=illegal-addr dst-address-type=!local action=jump jump-target=drop comment="Drop illegal destination addresses"
add chain=sanity-check in-interface=Local src-address-list=!local-addr action=jump jump-target=drop comment="Drop everything that goes from local interface but not from local address"
add chain=sanity-check in-interface=Public src-address-list=illegal-addr action=jump jump-target=drop comment="Drop illegal source addresses"
add chain=sanity-check in-interface=Public dst-address-list=!local-addr action=jump jump-target=drop comment="Drop everything that goes from public interface but not to local address"
add chain=sanity-check src-address-type=broadcast,multicast action=jump jump-target=drop comment="Drop all traffic that goes from multicast or broadcast addresses"

Application protocol specific filters
Aplikasi spesifik yang membutuhkan rule tertentu:

Code:

/ ip firewall filter
add chain=forward protocol=tcp action=jump jump-target=restrict-tcp
add chain=forward protocol=udp action=jump jump-target=restrict-udp
add chain=forward action=jump jump-target=restrict-ip
add chain=restrict-tcp connection-mark=auth action=reject
add chain=restrict-tcp connection-mark=smtp action=jump jump-target=smtp-first-drop comment="anti-spam policy"
add chain=smtp-first-drop src-address-list=first-smtp action=add-src-to-address-list address-list=approved-smtp
add chain=smtp-first-drop src-address-list=approved-smtp action=return
add chain=smtp-first-drop action=add-src-to-address-list address-list=first-smtp
add chain=smtp-first-drop action=reject reject-with=icmp-network-unreachable

Nah karena koneksi port / protocol yang tidak bisa diklafikasikan di atas, maka kita drop saja ^^

Code:

/ ip firewall filter
add chain=restrict-tcp connection-mark=other-tcp action=jump jump-target=drop
add chain=restrict-udp connection-mark=other-udp action=jump jump-target=drop
add chain=restrict-ip connection-mark=other action=jump jump-target=drop

Nah kan jaringan kita sudah terprotek dari luar, tapi.... mikrotik kita juga butuh security nih..........., maka liat aja nih firewall dibawah:

Code:

/ ip firewall filter
add chain=input src-address-type=local dst-address-type=local action=accept comment="Allow local traffic \(between router applications\)"
add chain=input in-interface=Local protocol=udp src-port=68 dst-port=67 action=jump jump-target=dhcp comment="DHCP protocol would not pass sanity checking, so enabling it explicitly before other checks"
add chain=input action=jump jump-target=sanity-check comment="Sanity Check"
add chain=input dst-address-type=!local action=jump jump-target=drop comment="Dropping packets not destined to the router itself, including all broadcast traffic"
add chain=input connection-mark=ping limit=5,5 action=accept comment="Allow pings, but at a very limited rate \(5 per sec\)"
add chain=input in-interface=Local action=jump jump-target=local-services comment="Allowing some services to be accessible from the local network"
add chain=input in-interface=Public action=jump jump-target=public-services comment="Allowing some services to be accessible from the Internet"
add chain=input action=jump jump-target=drop
add chain=dhcp src-address=0.0.0.0 dst-address=255.255.255.255 action=accept
add chain=dhcp src-address=0.0.0.0 dst-address-type=local action=accept
add chain=dhcp src-address-list=local-addr dst-address-type=local action=accept
add chain=local-services connection-mark=ssh action=accept comment="SSH \(22/TCP\)"
add chain=local-services connection-mark=dns action=accept comment="DNS"
add chain=local-services connection-mark=proxy action=accept comment="HTTP Proxy \(3128/TCP\)"
add chain=local-services connection-mark=winbox comment="Winbox \(8291/TCP\)" disabled=no
add chain=local-services action=drop comment="Drop Other Local Services"
add chain=public-services connection-mark=ssh action=accept comment="SSH \(22/TCP\)"
add chain=public-services connection-mark=pptp action=accept comment="PPTP \(1723/TCP\)"
add chain=public-services connection-mark=gre action=accept comment="GRE for PPTP"
add chain=public-services action=drop comment="Drop Other Public Services"

to be continued....... (too long bos)
Sebagai catatan rule ICMP harus di letakkan di atas rule drop untuk TCP dan UDP kalo engga nanti kita g bisa ping ke mikrotik kita,lebih baik rule diatas jangan dibalik2 deh biar ga bingung ^^

Kalo kita ingin membangun NTP Server, Web Proxy, dan DNS Cache(Server???) di mikrotik kita, maka harus dibelokkan lewat NAT dibawah ini:

Code:

/ ip firewall nat
add chain=dstnat in-interface=Local connection-mark=dns action=redirect comment="proxy for DNS requests"
add chain=dstnat in-interface=Local connection-mark=http protocol=tcp action=redirect to-ports=3128 comment="proxy for HTTP requests"
add chain=dstnat in-interface=Local connection-mark=ntp action=redirect comment="proxy for NTP requests"

settingan untuk server yg di maksud diatas:

Code:

/ system ntp server
set enabled=yes broadcast=no multicast=no manycast=no
/ system ntp client
set enabled=yes mode=unicast primary-ntp=xxx.xxx.xxx.xxx secondary-ntp=0.0.0.0
/ ip proxy
set enabled=yes port=3128 parent-proxy=0.0.0.0:1 maximal-client-connections=1000 maximal-server-connections=1000
/ ip dns
set primary-dns=yyy.yyy.yyy.yyy secondary-dns=0.0.0.0 allow-remote-requests=yes cache-size=2048KiB cache-max-ttl=1w

Untuk ip dns di setting sesuai ip yang diberikan oleh ISP masing2.

Untuk ip NTP Server gue pake ip nya NTP Ubuntu: 91.189.94.4
tapi tereserah kalian deh kalo ga mau ip nya ubuntu pake ip yang laen boleh2 aja.

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