IPsec VPN (Aggressive) interconnection with MikroTik

Parameter of IKE negotiation (Phase 1)

Parameter	Yamaha RTX810	MikroTik RB751G-2HnD
Encryption algorithm	3DES	3DES
Hash algorithm	SHA1	SHA1
Authentication method	Pre-shared-key	Pre-shared-key
DH group	2 (1024bit)	2 (1024bit)
Local ID	-	“mikrotik”
Remote ID	“mikrotik”	-
Mode	Aggressive	Aggressive

Parameter of IPsec negotiation (Phase 2)

Parameter	Yamaha RTX810	MikroTik RB751G-2HnD
Peer	-	200.1.1.201
Encryption algorithm	3DES	3DES
Hash algorithm	SHA1	SHA1
Local ID	192.168.100.0/24	192.168.88.0/24
Remote ID	192.168.88.0/24	192.168.100.0/24
Mode	Quick	Quick

VPN configuration setting with IPsec

RTX810

LAN interface settings (Use LAN1 Interface)	ip lan1 address 192.168.100.1/24
WAN Interface settings (Use LAN2 Interface)	pp select 1
	pp keepalive interval 30 retry-interval=30 count=12
	pp always-on on
	pppoe use lan2
	pppoe auto disconnect off
	pp auth accept pap chap
	pp auth myname (User ID) (Password)
	ppp lcp mru on 1454
	ppp ipcp ipaddress on
	ppp ipcp msext on
	ppp ccp type none
	ip pp nat descriptor 1000
	pp enable 1
	ip route default gateway pp 1
NAT settings	nat descriptor type 1000 masquerade
	nat descriptor masquerade static 1000 1 192.168.100.1 udp 500
	nat descriptor masquerade static 1000 2 192.168.100.1 esp
	nat descriptor masquerade static 1000 3 192.168.100.1 udp 4500
DHCP Server settings	dhcp service server
	dhcp server rfc2131 compliant except remain-silent
	dhcp scope 1 192.168.100.2-192.168.100.191/24
DNS settings	dns server pp 1
DNS settings	dns private address spoof on
IPsec VPN settings	tunnel select 1
	ipsec tunnel 1
	ipsec sa policy 1 1 esp 3des-cbc sha-hmac local-id=192.168.100.0/24 remote-id=192.168.88.0/24
	ipsec ike keepalive log 1 on
	ipsec ike keepalive use 1 on dpd
	ipsec ike local address 1 192.168.100.1
	ipsec ike local id 1 192.168.100.0/24
	ipsec ike nat-traversal 1 on
	ipsec ike payload type 1 3
	ipsec ike pre-shared-key 1 text (Pre-shared-key)
	ipsec ike remote address 1 any
	ipsec ike remote id 1 192.168.88.0/24
	ipsec ike remote name 1 mikrotik key-id
	ip tunnel tcp mss limit auto
	tunnel enable 1
	ipsec auto refresh on
	ip route 192.168.88.0/24 gateway tunnel 1
Filter settings	ip filter 200000 reject 10.0.0.0/8 * * * *
	ip filter 200001 reject 172.16.0.0/12 * * * *
	ip filter 200002 reject 192.168.0.0/16 * * * *
	ip filter 200003 reject 192.168.100.0/24 * * * *
	ip filter 200010 reject * 10.0.0.0/8 * * *
	ip filter 200011 reject * 172.16.0.0/12 * * *
	ip filter 200012 reject * 192.168.0.0/16 * * *
	ip filter 200013 reject * 192.168.100.0/24 * * *
	ip filter 200020 reject * * udp,tcp 135 *
	ip filter 200021 reject * * udp,tcp * 135
	ip filter 200022 reject * * udp,tcp netbios_ns-netbios_ssn *
	ip filter 200023 reject * * udp,tcp * netbios_ns-netbios_ssn
	ip filter 200024 reject * * udp,tcp 445 *
	ip filter 200025 reject * * udp,tcp * 445
	ip filter 200026 restrict * * tcpfin * www,21,nntp
	ip filter 200027 restrict * * tcprst * www,21,nntp
	ip filter 200030 pass * 192.168.100.0/24 icmp * *
	ip filter 200031 pass * 192.168.100.0/24 established * *
	ip filter 200032 pass * 192.168.100.0/24 tcp * ident
	ip filter 200033 pass * 192.168.100.0/24 tcp ftpdata *
	ip filter 200034 pass * 192.168.100.0/24 tcp,udp * domain
	ip filter 200035 pass * 192.168.100.0/24 udp domain *
	ip filter 200036 pass * 192.168.100.0/24 udp * ntp
	ip filter 200037 pass * 192.168.100.0/24 udp ntp *
	ip filter 200080 pass * 192.168.100.1 udp * 500
	ip filter 200081 pass * 192.168.100.1 esp * *
	ip filter 200082 pass * 192.168.100.1 udp * 4500
	ip filter 200098 reject-nolog * * established
	ip filter 200099 pass * * * * *
	ip filter 500000 restrict * * * * *
	ip filter dynamic 200080 * * ftp
	ip filter dynamic 200081 * * domain
	ip filter dynamic 200082 * * www
	ip filter dynamic 200083 * * smtp
	ip filter dynamic 200084 * * pop3
	ip filter dynamic 200085 * * submission
	ip filter dynamic 200098 * * tcp
	ip filter dynamic 200099 * * udp
	pp select 1
	ip pp secure filter in 200003 200020 200021 200022 200023 200024 200025 200030 200032 200080 200081 200082
	ip pp secure filter out 200013 200020 200021 200022 200023 200024 200025 200026 200027 200099 dynamic 200080 200081 200082 200083 200084 200085 200098 200099
	pp enable 1

Required Setting on MikroTik Winbox

Set the followings from initial configuration.

Interface address setting

Location: [IP] – [Addresses]
Configure interface address setting.

Firewall setting

Location: [IP] – [Firewall] – [Filter Rules]
Add input filter for UDP destination port 500 (IKE).
Add input filter for ipsec-esp (ESP).
Add input filter for UDP destination port 4500 (NAT Traversal)