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[TUTORIAL] Sophos XG Firewall - Konfigurasi IPsec VPN Site-to-Site Preshared Key

Hari ini saya dihadapkan dengan berdirinya salah satu group di Palembang, Sumatera Selatan. Dimana site tersebut membutuhkan koneksi ke Jakarta untuk mengakses beberapa server dan aplikasi. Dimana catatan ini akan menjelaskan langkah-langkah untuk membuat koneksi IPsec VPN Site-to-Site Preshared Key di Sophos XG Firewall.

Berikut Topologi & Skenarionya


IPsec VPN Network Diagram - ITSTAFF.web.id

Location JAKARTA PALEMBANG
Site Head Office Branch Office
Device Name Sophos XG 210 Sophos XG 210
Device FirmwareSFOS 17.5.15 MR-15
SFOS 18.5.4 MR4-Build418		 SFOS 17.5.14 MR-14-1
SFOS 17.5.15 MR-15
Device IP 192.168.101.254 192.168.201.254
LAN Subnet 192.168.101.0/24 192.168.201.0/24
LAN Port Port6 Port6
WAN Bandwidth Dedicated 30 Mbps Dedicated 20 Mbps
WAN IP 103.138.40.11 203.238.50.21
WAN Port Port1 Port1
IPsec Connection Type Site-to-Site Site-to-Site
IPsec Gateway Type Respond only Initiate the connection
IPsec Policy DefaultHeadOffice DefaultBranchOffice
IPsec Authentication Type Preshared key Preshared key

Oke lah kalau begitu, tanpa basa-basi lagi, langsung saja mari kita mulai konfigurasi...

1. Konfigurasi XG210-JAKARTA - Head Office

1.1. Login ke Sophos XG210 Firewall, langkah pertama adalah menambahkan LAN Subnet (Jakarta dan Palembang), klik SYSTEM Host and services ⇒ IP host ⇒ Add

  • Local LAN (Jakarta Subnet)
    • IP host Jakarta - ITSTAFF.web.id
  • Remote LAN (Palembang Subnet)
    • IP host Palembang - ITSTAFF.web.id
  • Save

1.2. Sekarang membuat IPsec VPN connection, klik CONFIGURE VPN ⇒ IPsec connections ⇒ Add

  • General settings
    • Name: VPN_PLG
    • IP version: IPv4
    • Connection type: Site-to-Site
    • Gateway type: Respond only
    • Active on save checked
    • Create firewall rule unchecked
  • Encryption
    • Policy: DefaultHeadOffice
    • Authentication type: Preshared key
    • Preshared key: <Password IPsec>
    • Repeat preshared key: <Password IPsec>
  • Gateway settings
      • Local gateway
    • Listening interface: Port1 (WAN1)
    • Local ID type: Select local ID (default)
    • Local subnet: Add new item ⇒ 101.168.192_JKT
      • Remote gateway
    • Gateway address: 203.238.50.21
    • Remote ID type: Select remote ID (default)
    • Remote subnet: Add new item ⇒ 201.168.192_PLG
  • Network Address Translation (NAT) unchecked
  • Advanced: User authentication mode: None
  • Save

1.3. Setelah itu, membuat dua Firewall Rules untuk IPsec VPN traffic, klik PROTECT Firewall (v17) / Rules and policies (v18) ⇒ + Add firewall rule ⇒ User/network rule

    1.3.1. Group LAN to VPN
  • Rule name *: LAN_VPN_PLG
  • Action: Accept
  • Log firewall traffic checked
  • Rule position: Top
  • Rule group: LAN to VPN
  • Source
    • Source zones *: Add new item ⇒ LAN
    • Source networks and devices *: Add new item ⇒ 101.168.192_JKT
    • During scheduled time: All the time
  • Destination and services
    • Destination zones *: Add new item ⇒ VPN
    • Destination networks *: Add new item ⇒ 201.168.192_PLG
    • Services *: Any
  • Identity (v17): Match known users unchecked
  • Web malware and content scanning (v17) / Security features (v18)
    • Web policy: None
    • Scan FTP for malware checked
    • Unchecked All
  • Advanced (v17) / Other security features (v18)
    • App control: None
    • IPS: None
    • Shape traffic: None
    • Scan email content: None
  • Save

    1.3.2. Group VPN to LAN
  • Rule name *: VPN_LAN_PLG
  • Action: Accept
  • Log firewall traffic checked
  • Rule position: Top
  • Rule group: VPN to LAN
  • Source
    • Source zones *: Add new item ⇒ VPN
    • Source networks and devices *: Add new item ⇒ 201.168.192_PLG
    • During scheduled time: All the time
  • Destination and services
    • Destination zones *: Add new item ⇒ LAN
    • Destination networks *: Add new item ⇒ 101.168.192_JKT
    • Services *: Any
  • Identity (v17): Match known users unchecked
  • Web malware and content scanning (v17) / Security features (v18)
    • Web policy: None
    • Scan FTP for malware checked
    • Unchecked All
  • Advanced (v17) / Other security features (v18)
    • App control: None
    • IPS: None
    • Shape traffic: None
    • Scan email content: None
  • Save

Berikut posisi atau penempatan Firewall Rules yang saya terapkan pada perangkat Sophos XG210 Firewall.

  • LAN to VPN
    • LAN_VPN_PLG (1.3.1)
  • WAN to LAN
  • LAN to WAN
  • LAN to LAN
  • VPN to LAN
    • VPN_LAN_PLG (1.3.2)

2. Konfigurasi XG210-PALEMBANG - Branch Office

2.1. Login ke Sophos XG210 Firewall, langkah pertama adalah menambahkan LAN Subnet (Palembang dan Jakarta), klik SYSTEM Host and services ⇒ IP host ⇒ Add

  • Local LAN (Palembang Subnet)
    • IP host Palembang - ITSTAFF.web.id
  • Remote LAN (Jakarta Subnet)
    • IP host Jakarta - ITSTAFF.web.id
  • Save

2.2. Sekarang membuat IPsec VPN connection, klik CONFIGURE VPN ⇒ IPsec connections ⇒ Add

  • General settings
    • Name: VPN_JKT
    • IP version: IPv4
    • Connection type: Site-to-Site
    • Gateway type: Initiate the connection
    • Active on save checked
    • Create firewall rule unchecked
  • Encryption
    • Policy: DefaultBranchOffice
    • Authentication type: Preshared key
    • Preshared key: <Password IPsec>
    • Repeat preshared key: <Password IPsec>
  • Gateway settings
      • Local gateway
    • Listening interface: Port1 (WAN1)
    • Local ID type: Select local ID (default)
    • Local subnet: Add new item ⇒ 201.168.192_PLG
      • Remote gateway
    • Gateway address: 103.138.40.11
    • Remote ID type: Select remote ID (default)
    • Remote subnet: Add new item ⇒ 101.168.192_JKT
  • Network Address Translation (NAT) unchecked
  • Advanced: User authentication mode: None
  • Save

2.3. Setelah itu, membuat dua Firewall Rules untuk IPsec VPN traffic, klik PROTECT Firewall (v17) / Rules and policies (v18) ⇒ + Add firewall rule ⇒ User/network rule

    2.3.1. Group LAN to VPN
  • Rule name *: LAN_VPN_JAKARTA
  • Action: Accept
  • Log firewall traffic checked
  • Rule position: Top
  • Rule group: LAN to VPN
  • Source
    • Source zones *: Add new item ⇒ LAN
    • Source networks and devices *: Add new item ⇒ 201.168.192_PLG
    • During scheduled time: All the time
  • Destination and services
    • Destination zones *: Add new item ⇒ VPN
    • Destination networks *: Add new item ⇒ 101.168.192_JKT
    • Services *: Any
  • Identity (v17): Match known users unchecked
  • Web malware and content scanning (v17) / Security features (v18)
    • Web policy: None
    • Scan FTP for malware checked
    • Unchecked All
  • Advanced (v17) / Other security features (v18)
    • App control: None
    • IPS: None
    • Shape traffic: None
    • Scan email content: None
  • Save

    2.3.2. Group VPN to LAN
  • Rule name *: VPN_LAN_JAKARTA
  • Action: Accept
  • Log firewall traffic checked
  • Rule position: Top
  • Rule group: VPN to LAN
  • Source
    • Source zones *: Add new item ⇒ VPN
    • Source networks and devices *: Add new item ⇒ 101.168.192_JKT
    • During scheduled time: All the time
  • Destination and services
    • Destination zones *: Add new item ⇒ LAN
    • Destination networks *: Add new item ⇒ 201.168.192_PLG
    • Services *: Any
  • Identity (v17): Match known users unchecked
  • Web malware and content scanning (v17) / Security features (v18)
    • Web policy: None
    • Scan FTP for malware checked
    • Unchecked All
  • Advanced (v17) / Other security features (v18)
    • App control: None
    • IPS: None
    • Shape traffic: None
    • Scan email content: None
  • Save

Berikut posisi atau penempatan Firewall Rules yang saya terapkan pada perangkat Sophos XG210 Firewall.

  • LAN to VPN
    • LAN_VPN_JAKARTA (2.3.1)
  • WAN to LAN
  • LAN to WAN
  • LAN to LAN
  • VPN to LAN
    • VPN_LAN_JAKARTA (2.3.2)

3. Pengujian Tunnel IPsec VPN Site-to-Site Connections

Dengan konfigurasi diatas, harusnya tunnel IPsec VPN Site-to-Site sudah terbentuk. Kalian bisa cek statusnya di Sophos XG210 Jakarta & Palembang, klik CONFIGURE VPN ⇒ IPsec connections

Status IPsec VPN - ITSTAFF.web.id

Jika Status Active dan Connection sudah berwarna hijau, sekarang saatnya test koneksi atau ping dari perangkat di bawah Firewall, misal dari komputer desktop lokal di masing-masing site Jakarta maupun Palembang untuk memastikan koneksi IPsec VPN Site-to-Site ini berjalan dan bekerja. Jika masih Request time out, silahkan cek Rules and Policies Firewall (LAN to VPN & VPN to LAN).

Itu saja yang saya lakukan dalam membuat koneksi IPsec VPN Site-to-Site Preshared Key di Sophos XG210, konfigurasi di atas bisa juga diterapkan pada Sophos XG Firewall Series. Semoga catatan ini bisa berguna untuk saya dan kalian yang membacanya.


Referensi: Sophos XG Firewall - How to set a Site-to-Site IPsec VPN connection using a preshared key
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