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STRONGSWAN 2.8
9.2 PGPnet. Use the file peerCert.p12 to import PGPnet's X.509 certificate, the CA certificate, plus the encrypted private key in binary PKCS#12 format into the PGPkey tool. You will be prompted for the passphrase securing the private key. Use the file myCert.pem to import the X.509 certificate of the strongSwan security gateway intothe PGPkey tool.
WINDOWS CLIENTS
value meaning; 0 (default) disable AES-256-CBC and MODP-2048 : 1 : Enable AES-256-CBC and MODP-2048 : 2 : Enforce the usage of AES-256-CBC and MODP-2048SWANCTL.CONF
swanctl.conf¶. Table of contents; swanctl.conf. Time Formats; Settings. authorities section; connections section; secrets section; pools section; This file provides connections, secrets and IP address pools for the swanctl--load* commands.. It uses a strongswan.conf-style syntax (referencing sections, since 5.7.0, and including other files is supported as well) and is located in theswanctl
UPDOWN PLUGIN
NAT TRAVERSAL (NAT-T) NAT Traversal (NAT-T)¶ The IKEv2 protocol includes NAT traversal (NAT-T) in the core standard, but it's optional to implement. strongSwan implements it and does not require any specialconfiguration.
IPV6 CONFIGURATION EXAMPLES Complete List¶. All IPv6 test scenarios. Please be aware that the strongSwan IKE daemon cannot listen on IPv6 link-local addresses (fe80:..). You must assign a site-local, unique-local, or global IPv6 address to the physical network interface first. IPSEC.CONF: CONN REFERENCE INTEROPERABILITY WITH FORTINET BRAND DEVICES Software Version Quirks; FortiOS * * IKEv2 is only supported with a single set of subnets per CHILD_SA. Thus the same workaround for IKEv1 has to be used with them. IPSEC.CONF: CONFIG SETUP REFERENCE ipsec.conf: config setup¶. cachecrls = yes | no if enabled, certificate revocation lists (CRLs) fetched via HTTP or LDAP will be cached in /etc/ipsec.d/crls/ under a unique file name derived from the certification authority's public key. STRONGSWAN - IPSEC VPN FOR LINUX, ANDROID, FREEBSD, MAC OSSTRONGSWAN.ORGWIKI/PROJECT MANAGEMENTDOWNLOADSGITWEBSTRONGSWAN NETWORKMANAGER APPLET strongSwan the OpenSource IPsec-based VPN Solution. runs on Linux 2.6, 3.x and 4.x kernels, Android, FreeBSD, OS X, iOS and Windows; implements both the IKEv1 and IKEv2 key exchange protocolsFully tested support of IPv6 IPsec tunnel and transport connections; Dynamical IP address and interface update with IKEv2 MOBIKE ()Automatic insertion and deletion of IPsec-policy-based firewall rulesSTRONGSWAN 2.8
9.2 PGPnet. Use the file peerCert.p12 to import PGPnet's X.509 certificate, the CA certificate, plus the encrypted private key in binary PKCS#12 format into the PGPkey tool. You will be prompted for the passphrase securing the private key. Use the file myCert.pem to import the X.509 certificate of the strongSwan security gateway intothe PGPkey tool.
WINDOWS CLIENTS
value meaning; 0 (default) disable AES-256-CBC and MODP-2048 : 1 : Enable AES-256-CBC and MODP-2048 : 2 : Enforce the usage of AES-256-CBC and MODP-2048SWANCTL.CONF
swanctl.conf¶. Table of contents; swanctl.conf. Time Formats; Settings. authorities section; connections section; secrets section; pools section; This file provides connections, secrets and IP address pools for the swanctl--load* commands.. It uses a strongswan.conf-style syntax (referencing sections, since 5.7.0, and including other files is supported as well) and is located in theswanctl
UPDOWN PLUGIN
NAT TRAVERSAL (NAT-T) NAT Traversal (NAT-T)¶ The IKEv2 protocol includes NAT traversal (NAT-T) in the core standard, but it's optional to implement. strongSwan implements it and does not require any specialconfiguration.
IPV6 CONFIGURATION EXAMPLES Complete List¶. All IPv6 test scenarios. Please be aware that the strongSwan IKE daemon cannot listen on IPv6 link-local addresses (fe80:..). You must assign a site-local, unique-local, or global IPv6 address to the physical network interface first. IPSEC.CONF: CONN REFERENCE INTEROPERABILITY WITH FORTINET BRAND DEVICES Software Version Quirks; FortiOS * * IKEv2 is only supported with a single set of subnets per CHILD_SA. Thus the same workaround for IKEv1 has to be used with them. IPSEC.CONF: CONFIG SETUP REFERENCE ipsec.conf: config setup¶. cachecrls = yes | no if enabled, certificate revocation lists (CRLs) fetched via HTTP or LDAP will be cached in /etc/ipsec.d/crls/ under a unique file name derived from the certification authority's public key. INTRODUCTION TO STRONGSWAN Introduction to strongSwan¶. Table of contents; Introduction to strongSwan. Prerequisites; Securing a Network; IKE and IPsec Basics; Authentication BasicsWINDOWS CLIENTS
value meaning; 0 (default) disable AES-256-CBC and MODP-2048 : 1 : Enable AES-256-CBC and MODP-2048 : 2 : Enforce the usage of AES-256-CBC and MODP-2048ROUTE-BASED VPNS
Statistics are available via ip -s link show .. xfrmi provides a --list option to list existing XFRM interfaces if using older versions of iproute2, i.e. if ip -d link does not list the interface ID of XFRM interfaces yet.. Configuration¶. The daemon will not install any routes for CHILD_SAs with outbound interface ID, so it's not necessary to disable the route installation globally. INTEROPERABILITY WITH FORTINET BRAND DEVICES Software Version Quirks; FortiOS * * IKEv2 is only supported with a single set of subnets per CHILD_SA. Thus the same workaround for IKEv1 has to be used with them. SECURITY RECOMMENDATIONS Security Recommendations¶. Table of contents; Security Recommendations. Broken Algorithms; Tunnel Shunting; Cipher Selection; Preshared Keys (PSKs) PSK authentication and aggressive mode SETTING-UP A SIMPLE CA USING THE STRONGSWAN PKI TOOL Setting-up a Simple CA Using the strongSwan PKI Tool¶. Table of contents; Setting-up a Simple CA Using the strongSwan PKI Tool. CA Certificate; End Entity Certificates USABLE EXAMPLES CONFIGURATIONS Initiator¶. These configuration files provide valid and usable configurations as use as a roadwarrior client against arbitrary IKE responders that are configured correctly. IPSEC.CONF: CONN REFERENCE ipsec.conf: conn ¶ Table of contents; ipsec.conf: conn General Connection Parameters; left|right End Parameters; IKEv2 Mediation Extension Parameters IPSEC.CONF REFERENCE ipsec.conf¶. strongSwan's /etc/ipsec.conf configuration file consists of three different section types:. config setup defines general configuration parameters; conn TAKING TRAFFIC DUMPS ON LINUX Taking traffic dumps on Linux¶. Table of contents; Taking traffic dumps on Linux. Abstract; Warning; The problem; The solution; Rules; Examples. ingress IPsec and IKE Traffic rule STRONGSWAN - IPSEC VPN FOR LINUX, ANDROID, FREEBSD, MAC OSSTRONGSWAN.ORGWIKI/PROJECT MANAGEMENTDOWNLOADSGITWEBSTRONGSWAN NETWORKMANAGER APPLET strongSwan the OpenSource IPsec-based VPN Solution. runs on Linux 2.6, 3.x and 4.x kernels, Android, FreeBSD, OS X, iOS and Windows; implements both the IKEv1 and IKEv2 key exchange protocolsFully tested support of IPv6 IPsec tunnel and transport connections; Dynamical IP address and interface update with IKEv2 MOBIKE ()Automatic insertion and deletion of IPsec-policy-based firewall rules INTRODUCTION TO STRONGSWAN strongSwan provides several methods to do this: Public Key Authentication: This uses RSA, ECDSA or EdDSA X.509 certificates to verify the authenticity of the peer. Certificates can be self-signed (in which case they have to be installed on all peers), or signed by a common. Certificate Authority (CA).WINDOWS CLIENTS
strongSwan currently can authenticate Windows clients either on the basis of X.509 Machine Certificates using RSA signatures (case A), X.509 User Certificates using EAP-TLS (case B), or Username/Password using EAP-MSCHAPv2 (case C). The client does not support multiple authentication rounds ( RFC 4739 ). VIRTUAL IP - STRONGSWAN Virtual IP¶. IKEv1 and IKEv2 both know the concept of virtual IPs. This means that the initiator requests an additional IP address from the responder to use as inner IPsec tunnel address. In IKEv1, virtual IPs are exchanged using the mode config extension. IKEv2 has full support for virtual IPs in the core standard using configurationpayloads.
ROUTE-BASED VPNS
Statistics are available via ip -s link show .. xfrmi provides a --list option to list existing XFRM interfaces if using older versions of iproute2, i.e. if ip -d link does not list the interface ID of XFRM interfaces yet.. Configuration¶. The daemon will not install any routes for CHILD_SAs with outbound interface ID, so it's not necessary to disable the route installation globally. INTEROPERABILITY WITH FORTINET BRAND DEVICES Thus the same workaround for IKEv1 has to be used with them. * When the device receives an IKE_SA_INIT from any valid peer, it initiates a tunnel on its own to that peer. That leads to CHILD_SA duplication. * The FortiGate device sometimes sends an invalid checksum, causing Strongswan to switch to NAT-T encapsulated ESP while the FortiGateIKEV2 CIPHER SUITES
IKEv2 Cipher Suites¶. IKEv2 Cipher Suites. The keywords listed below can be used with the ike and esp directives in ipsec.conf or the proposals settings in swanctl.conf to define cipher suites. IANA provides a complete list of algorithm identifiers registered forIKEv2.
IPSEC.CONF: CONFIG SETUP REFERENCE ipsec.conf: config setup¶. ipsec.conf: config setup. under a unique file name derived from the certification authority's public key. how much charon debugging output should be logged. A comma-separated list containing. type/level pairs may be specified, e.g: dmn 3, ike 1, net USABLE EXAMPLES CONFIGURATIONS IPSEC.CONF REFERENCE ipsec.conf¶. strongSwan's /etc/ipsec.conf configuration file consists of three different section types:. config setup defines general configuration parameters; conn STRONGSWAN - IPSEC VPN FOR LINUX, ANDROID, FREEBSD, MAC OSSTRONGSWAN.ORGWIKI/PROJECT MANAGEMENTDOWNLOADSGITWEBSTRONGSWAN NETWORKMANAGER APPLET strongSwan the OpenSource IPsec-based VPN Solution. runs on Linux 2.6, 3.x and 4.x kernels, Android, FreeBSD, OS X, iOS and Windows; implements both the IKEv1 and IKEv2 key exchange protocolsFully tested support of IPv6 IPsec tunnel and transport connections; Dynamical IP address and interface update with IKEv2 MOBIKE ()Automatic insertion and deletion of IPsec-policy-based firewall rules INTRODUCTION TO STRONGSWAN strongSwan provides several methods to do this: Public Key Authentication: This uses RSA, ECDSA or EdDSA X.509 certificates to verify the authenticity of the peer. Certificates can be self-signed (in which case they have to be installed on all peers), or signed by a common. Certificate Authority (CA).WINDOWS CLIENTS
strongSwan currently can authenticate Windows clients either on the basis of X.509 Machine Certificates using RSA signatures (case A), X.509 User Certificates using EAP-TLS (case B), or Username/Password using EAP-MSCHAPv2 (case C). The client does not support multiple authentication rounds ( RFC 4739 ). VIRTUAL IP - STRONGSWAN Virtual IP¶. IKEv1 and IKEv2 both know the concept of virtual IPs. This means that the initiator requests an additional IP address from the responder to use as inner IPsec tunnel address. In IKEv1, virtual IPs are exchanged using the mode config extension. IKEv2 has full support for virtual IPs in the core standard using configurationpayloads.
ROUTE-BASED VPNS
Statistics are available via ip -s link show .. xfrmi provides a --list option to list existing XFRM interfaces if using older versions of iproute2, i.e. if ip -d link does not list the interface ID of XFRM interfaces yet.. Configuration¶. The daemon will not install any routes for CHILD_SAs with outbound interface ID, so it's not necessary to disable the route installation globally. INTEROPERABILITY WITH FORTINET BRAND DEVICES Thus the same workaround for IKEv1 has to be used with them. * When the device receives an IKE_SA_INIT from any valid peer, it initiates a tunnel on its own to that peer. That leads to CHILD_SA duplication. * The FortiGate device sometimes sends an invalid checksum, causing Strongswan to switch to NAT-T encapsulated ESP while the FortiGateIKEV2 CIPHER SUITES
IKEv2 Cipher Suites¶. IKEv2 Cipher Suites. The keywords listed below can be used with the ike and esp directives in ipsec.conf or the proposals settings in swanctl.conf to define cipher suites. IANA provides a complete list of algorithm identifiers registered forIKEv2.
IPSEC.CONF: CONFIG SETUP REFERENCE ipsec.conf: config setup¶. ipsec.conf: config setup. under a unique file name derived from the certification authority's public key. how much charon debugging output should be logged. A comma-separated list containing. type/level pairs may be specified, e.g: dmn 3, ike 1, net USABLE EXAMPLES CONFIGURATIONS IPSEC.CONF REFERENCE ipsec.conf¶. strongSwan's /etc/ipsec.conf configuration file consists of three different section types:. config setup defines general configuration parameters; conn INTRODUCTION TO STRONGSWAN strongSwan provides several methods to do this: Public Key Authentication: This uses RSA, ECDSA or EdDSA X.509 certificates to verify the authenticity of the peer. Certificates can be self-signed (in which case they have to be installed on all peers), or signed by a common. Certificate Authority (CA). STRONGSWAN - DOCUMENTATION strongSwan - Documentation strongSwan Documentation. wiki.strongswan.org offers the most up-to-date information and many HOWTOs; Installation; Configuration; Examples (see UsableExamples on the wiki for simpler examples); Miscellaneous. Open Source Trend Days 2013 Steinfurt: The strongSwan Open Source VPN Solution Linux Security Summit August 2012 San Diego: The Linux IntegrityROUTE-BASED VPNS
Statistics are available via ip -s link show .. xfrmi provides a --list option to list existing XFRM interfaces if using older versions of iproute2, i.e. if ip -d link does not list the interface ID of XFRM interfaces yet.. Configuration¶. The daemon will not install any routes for CHILD_SAs with outbound interface ID, so it's not necessary to disable the route installation globally.STRONGSWAN PLUGINS
strongSwan plugins. The strongSwan distribution ships with an ever growing list of plugins. This allows us to add extended and specialized features, but keep the core as small as possible. Many components of strongSwan come with a set of plugins. The plugins for libstrongswan provide cryptographic backends, URI fetchers anddatabase layers.
SECURITY RECOMMENDATIONS PSKs are usually a lot shorter than RSA keys and have a lot less entropy, so cryptographically speaking. they often are a lot weaker than RSA keys. Therefore, to securely use PSKs, they have to be very long and. random. A good way to generate strong PSKs is toBase64-encode
IPSEC.CONF: CONFIG SETUP REFERENCE ipsec.conf: config setup¶. ipsec.conf: config setup. under a unique file name derived from the certification authority's public key. how much charon debugging output should be logged. A comma-separated list containing. type/level pairs may be specified, e.g: dmn 3, ike 1, net IKEV2-BASED VPNS USING STRONGSWAN Andreas Steffen, 27.10.2009, LinuxKongress2009.ppt 1 Linux Kongress 2009 Dresden IKEv2-based VPNs using strongSwan Prof. Dr. Andreas Steffen andreas.steffen@strongswan.org NAT TRAVERSAL (NAT-T) NAT Traversal (NAT-T)¶ The IKEv2 protocol includes NAT traversal (NAT-T) in the core standard, but it's optional to implement. strongSwan implements it and does not require any specialconfiguration.
STRONGSWAN - STRONGSWAN VULNERABILITY (CVE-2018-10811) strongSwan Vulnerability (CVE-2018-10811) A denial-of-service vulnerability in the IKEv2 key derivation if the openssl plugin is used in FIPS mode and HMAC-MD5 is negotiated as PRF was discovered, all strongSwan versions since 5.0.1 may be affected. One of our users privately reported a denial-of-service vulnerability in strongSwan. TAKING TRAFFIC DUMPS ON LINUX This is a short tutorial on how to get correct IPsec traffic dumps on Linux. Many users are not aware of the packet capture anomaly that occurs when capturing with default. settings using Wireshark and tcpdump. This article will explain how to take correct traffic dumps.* strongswan.org
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Current Release: _5.9.2_ Download - ChangelogSTRONGSWAN
THE OPENSOURCE IPSEC-BASED VPN SOLUTION * runs on Linux 2.6, 3.x and 4.x kernels, Android, FreeBSD, OS X,iOS and Windows
* implements both the IKEv1 and IKEv2 (RFC 7296 ) key exchange protocols * Fully tested support of IPv6 IPsec tunnel and transport connections * Dynamical IP address and interface update with IKEv2 MOBIKE (RFC4555 )
* Automatic insertion and deletion of IPsec-policy-based firewallrules
* NAT-Traversal via UDP encapsulation and port floating (RFC 3947)
* Support of IKEv2 message fragmentation (RFC 7383 ) to avoid issues with IPfragmentation
* Dead Peer Detection (DPD, RFC 3706 ) takes care of dangling tunnels * Static virtual IPs and IKEv1 ModeConfig pull and push modes * XAUTH server and client functionality on top of IKEv1 Main Modeauthentication
* Virtual IP address pool managed by IKE daemon or SQL database * Secure IKEv2 EAP user authentication (EAP-SIM, EAP-AKA, EAP-TLS, EAP-TTLS, EAP-PEAP, EAP-MSCHAPv2, etc.) * Optional relaying of EAP messages to AAA server via EAP-RADIUSplugin
* Support of IKEv2 Multiple Authentication Exchanges (RFC 4739)
* Authentication based on X.509 certificates or preshared keys * Use of strong signature algorithms with _Signature Authentication in IKEv2_ (RFC 7427 ) * Retrieval and local caching of Certificate Revocation Lists viaHTTP or LDAP
* Full support of the Online Certificate Status Protocol (OCSP, RFC2560 ).
* CA management (OCSP and CRL URIs, default LDAP server) * Powerful IPsec policies based on wildcards or intermediate CAs * Storage of RSA private keys and certificates on a smartcard (PKCS#11
interface) or protected by a TPM 2.0 * Modular plugins for crypto algorithms and relational databaseinterfaces
* Support of NIST elliptic curve DH groups and ECDSA signatures and certificates (Suite B, RFC 4869 ) * Support of X25519 elliptic curve DH group (RFC 8031 ) and Ed25519 signatures and certificates (RFC 8420 ) * Optional built-in integrity and crypto tests for plugins andlibraries
* Smooth Linux desktop integration via the strongSwan NetworkManagerapplet
* Trusted Network Connect compliant to PB-TNC (RFC 5793), PA-TNC (RFC 5792
), PT-TLS (RFC 6876
), PT-EAP (RFC 7171
) and SWIMA for PA-TNC (RFC 8412)
_STRONGSWAN_ VPN CLIENT FOR ANDROID 4 AND NEWER * The free strongSwan App can be downloaded from Google Play.
The VPN client supports IKEv2 only with EAP-MD5 or EAP-MSCHAPv2 password-based, or certificate based user authentication and certificate-based VPN gateway authentication. _STRONGSWAN 5.X_ WITH SINGLE MONOLITHIC _IKEV1_/_IKEV2_
DAEMON
* The strongSwan 5.x branch supports both the IKEv1 and IKEv2 key exchange protocols in conjunction with the native NETKEY IPsec stack of the Linux kernel. The _charon_ IKE daemon is based on a modern object-oriented and multi-threaded concept, with 100% of the code being written in C. strongSwan's IKEv2 functionality has been successfully tested against 15 IKEv2 vendors during the third and fourth IKEv2 Interoperability Workshops in 2007 and 2008, respectively. The IKEv1 functionality has been re-implemented in 2012 from scratch by extending the source code of our successful IKEv2 charon daemon. IKEv1 interoperability has been tested against the existing strongSwan 4.6 pluto daemon and several third party products. ------------------------- 2021-02-26 info@strongswan.orgDetails
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