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technical:ipsec:strongswan [2023/04/07 15:59] – jctechnical:ipsec:strongswan [2023/06/12 10:52] (current) – jc
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 # Install # Install
 Install the strongswan package from fedora package repository. Install the strongswan package from fedora package repository.
-```+```bash
 dnf install -y strongswan dnf install -y strongswan
 ``` ```
 # Configuration # Configuration
-## Forwarding+## IP Forwarding
 Enable IPv4 traffic forwarding on both VPN sites. Enable IPv4 traffic forwarding on both VPN sites.
 /etc/sysctl.conf /etc/sysctl.conf
-```+```bash
 net.ipv4.ip_forward = 1 net.ipv4.ip_forward = 1
 ``` ```
 Reload sysctl settings Reload sysctl settings
-```+```bash
 sysctl -p sysctl -p
 ``` ```
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 Configure a network interface for the WAN connection between VPNs and a network interface for the LAN host network. Configure a network interface for the WAN connection between VPNs and a network interface for the LAN host network.
 ### VPN-Site-1 ### VPN-Site-1
-```+```bash
 nmcli connection add ifname ens4 connection.id wan connection.type 802-3-ethernet mtu 1460 ipv4.method manual ipv4.address 100.64.20.1/30 nmcli connection add ifname ens4 connection.id wan connection.type 802-3-ethernet mtu 1460 ipv4.method manual ipv4.address 100.64.20.1/30
 nmcli connection add ifname ens5 connection.id lan connection.type 802-3-ethernet ipv4.method manual ipv4.address 192.168.80.1/24 mtu 1460 nmcli connection add ifname ens5 connection.id lan connection.type 802-3-ethernet ipv4.method manual ipv4.address 192.168.80.1/24 mtu 1460
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 ``` ```
 ### VPN-Site-2 ### VPN-Site-2
-```+```bash
 nmcli connection add ifname ens4 connection.id wan connection.type 802-3-ethernet mtu 1460 ipv4.method manual ipv4.address 100.64.20.2/30 nmcli connection add ifname ens4 connection.id wan connection.type 802-3-ethernet mtu 1460 ipv4.method manual ipv4.address 100.64.20.2/30
 nmcli connection add ifname ens5 connection.id lan connection.type 802-3-ethernet ipv4.method manual ipv4.address 192.168.90.1/24 mtu 1460 nmcli connection add ifname ens5 connection.id lan connection.type 802-3-ethernet ipv4.method manual ipv4.address 192.168.90.1/24 mtu 1460
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 ## Firewall ## Firewall
 Configure firewall rules for both VPN sites. Configure firewall rules for both VPN sites.
-```+```bash
 firewall-cmd --permanent --add-zone=wan firewall-cmd --permanent --add-zone=wan
 firewall-cmd --permanent --change-zone=ens4 --zone=wan firewall-cmd --permanent --change-zone=ens4 --zone=wan
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 2. Copy the CA certificate, server certificate, and private key to both VPN sites. 2. Copy the CA certificate, server certificate, and private key to both VPN sites.
-```+```bash
 cp <ca_cert> /etc/strongswan/ipsec.d/cacerts/ cp <ca_cert> /etc/strongswan/ipsec.d/cacerts/
 cp <server_cert> /etc/strongswan/ipsec.d/certs/ cp <server_cert> /etc/strongswan/ipsec.d/certs/
 cp <vpn_key> /etc/strongswan/ipsec.d/private/ cp <vpn_key> /etc/strongswan/ipsec.d/private/
 +```
 +
 +3. Add the CA certificate to the certificate trust store.
 +```bash
 +cp <ca_cert> /etc/pki/ca-trust/source/anchors/
 +update-ca-trust
 ``` ```
  
 ## VPN ## VPN
 +The default `left` site is local and the `right` site is remote, however you can designate either site as left or right. 
 ### VPN-Site-1 ### VPN-Site-1
 /etc/srongswan/ipsec.conf /etc/srongswan/ipsec.conf
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 # Run # Run
 Start the VPN. Start the VPN.
-```+```bash
 strongswan start strongswan start
 +```
 +
 +The legacy systemd unit can configured by enabling the `strongswan-starter.service` script.
 +```bash
 +systemctl enable strongswan-starter.service
 +systemctl start strongswan-starter.service
 ``` ```
 # Links # Links
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 * http://www.remy.org.uk/tech.php?tech=1483382049 * http://www.remy.org.uk/tech.php?tech=1483382049
 </markdown> </markdown>
 +
technical/ipsec/strongswan.1680897552.txt.gz · Last modified: 2023/04/07 15:59 by jc

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