IPsec VPN (Main) interconnection with MikroTik

IPsec setting example on RTX810 & MikroTik RB751G

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)
Mode Main Main

Parameter of IPsec negotiation (Phase 2)

Parameter Yamaha RTX810 MikroTik RB751G-2HnD
Peer 200.1.1.202 200.1.1.201
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
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 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 off
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 pre-shared-key 1 text (Pre-shard-key)
ipsec ike remote address 1 200.1.1.202
ipsec ike remote id 1 192.168.88.0/24
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 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
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.

PPPoE Connection setting

Location: [PPP] – [Interface]
Configure provider setting for Internet connection.

Firewall setting

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

NAT setting

Location: [IP] – [Firewall] – [NAT]
Add NAT entry for communication to opposite site.

IPsec Policies setting

Location: [IP] – [IPsec] – [Policies]
Add IPsec Policies.

IPsec Peers setting

Location: [IP] – [IPsec] – [Peers]
Add IPsec Peers.

Route setting

Location: [IP] – [Routes] – [Routes]
Add Route setting to opposite site.

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