community wiki
Attachments
History
Blame
View Source
Changelog
Documentation
Toggle dark mode
Login
Home
A - Z
Page Index
Archived
ACKSystemReview
BuildingTapWindows
BuildingUsingGenericBuildsystem
DynamicDNS
GettingOpenvpnBuild
HLKTesting
IOSinline
Nonprivileged
OpenvpnMSIInstaller
Optimizing Performance on Gigabit Networks
PerformanceTesting
PrivilegeSeparation
RoadMap
SecurityOverview
StaticKeyMiniHowto
TapWindowsLicenseChange
TracWikiReplacements
UsingSmartcards
Changelogs
ChangesInOpenVPN1x
ChangesInOpenVPN20
ChangesInOpenVPN21
ChangesInOpenVPN22
ChangesInOpenVPN23
ChangesInOpenVPN24
ChangesInOpenVPN25
ChangesInOpenVPN26
Community Forum
DataChannelOffload
CI for DCO Linux
CapaNegotiation
Features
How To Contribute
LinuxUAPI
NonLinuxPlatforms
Routing
UsingDCO
WhatChanges
Development
CodeStyle
Contributing
DeveloperDocumentation
GerritBestPractices
OpenVPNMSICA
OpenVPN_QA
Openvpn2ReleaseProcess
PackageMaintainers
ReleaseOfOpenVPN
ServerSideTestingImprovementPlan
SettingUpBuildslave
StatusOfOpenvpn24
StatusOfOpenvpn25
StatusOfOpenvpn26
StatusOfOpenvpn27
StatusOfOpenvpn28
TesterDocumentation
Downloads
Verify signature
FAQ
247-i-am-having-problems-running-openvpn-with-the-windows-xp-firewall-enabled-whats-wrong
249-upgraded-the-openvpn-daemon-on-one-side-of-the-connection-to-v20-and-now-it-cant-connect
251-openvpn-server-successfully-connected-a-client-to-it-but-when-i-try-to-connect-a-second-client-the
253-tls-error-tls-key-negotiation-failed-to-occur-within-60-seconds-check-your-network-connectivity
255-qconnection-initiated-with-xxxxq-but-i-cannot-ping-the-server-through-the-vpn
257-can-an-openvpn-server-be-set-up-on-a-machine-with-a-single-nic
259-tap-win32-adapter-is-not-coming-up-initialization-sequence-completed-with-errors
261-when-i-try-configure-on-red-hat-9-linux-or-higher-it-complains-about-openssl-headers-not-found
263-openvpn-can-ping-both-peers-but-i-cant-reach-any-of-the-other-machines-on-the-remote-subnet
265-how-do-i-enable-ip-forwarding
267-i-am-having-trouble-getting-openvpn-1x-to-talk-with-openvpn-20
269-tue-oct-26-143448-2004-36880-write-udpv4--no-buffer-space-available-code105
271-i-can-ping-through-the-tunnel-but-any-real-work-causes-it-to-lock-up-is-this-an-mtu-problem
273-qifconfig-poolq-option-use-a-30-subnet-4-private-ip-addresses-per-client-when-used-in-tun-mode
275-why-cant-i-run-openvpn-on-windows-from-a-non-admin-user-account
277-i-uninstalled-openvpn-on-windows-2000-and-now-it-appears-that-winsock-is-broken-how-to-fix
279-are-there-any-issues-related-to-pushing-dhcp-options-to-windows-clients
281-what-to-do-if-the-installation-of-the-tap-win32-driver-fails
283-can-i-run-multiple-openvpn-tunnels-on-a-single-machine
285-everything-seems-to-be-configured-correctly-but-i-cant-ping-across-the-tunnel
287-is-ipv6-support-plannedin-the-works
289-how-can-i-build-a-binary-rpm-package-for-my-specific-linux-platform
291-on-slackware-i-get-the-error-cipher-algorithm-bf-cbc-not-found-openssl
293-what-is-the-principle-behind-openvpn-tunnels
295-are-there-any-known-security-vulnerabilities-with-openvpn
297-is-it-important-to-openvpn-security-practices-to-build-an-intermediate-certificate-authoritykey
299-can-openvpn-handle-the-situation-where-both-ends-of-the-connection-are-dynamic
301-does-openvpn-support-certificate-revocation-lists-crls
303-how-stable-is-the-openvpn-protocol-ie-can-old-versions-of-openvpn-talk-to-new-versions
305-what-is-the-difference-between-a-tun-device-and-a-tap-device
307-what-is-bridging
309-what-is-the-difference-between-bridging-and-routing
311-what-are-the-fundamental-differences-between-bridging-and-routing-in-terms-of-configuration
313-how-can-i-connect-windows-xp-to-a-linux-based-samba-server-using-routing-rather-than-bridging
315-i-get-the-error-cannot-ioctl-tunsetiff-tun0-file-descriptor-in-bad-state-errno77
317-qmulti-bad-source-address-from-client--packet-droppedq-or-qget-inst-by-virt-failedq
319-how-do-i-make-the-windows-network-adapter-my-default-adapter-again
321-remap-local-addresses-to-connect-two-networks-with-an-overlap-in-the-private-address-range
323-i-want-to-set-up-an-ethernet-bridge-on-the-1921681024-subnet-existing-dhcp
325-openvpn-as-a--forking-tcp-server-which-can-service-multiple-clients-over-a-single-tcp-port
327-changed-hex-bytes-in-the-static-key-the-key-still-connects-to-a-remote-peer-using-the-original-key
328-route-and-route-ipv6-in-ccd-files
329-problems-with-tls
330-CanIUseAWebBrowserAsAnOpenvpnClient
331-DoesOpenvpnSupportIpsecOrPptp
332-CanOpenvpnTunnelOverATcpConnection
333-WhyChooseTLSAsOpenvpnsUnderlyingAuthenticationAndKeyNegotiationProtocol
334-WhyMyOpenVPNTunnelDoesNot
GSoC2026_ideas
GSoC_howtopropose
HOWTO
Home
MTU and Fragments
Meetings
2010
2010-04-22
2010-04-29
2010-05-06
2010-05-13
2010-05-20
2010-05-27
2010-06-03
2010-06-10
2010-06-17
2010-07-01
2010-07-08
2010-07-15
2010-07-22
2010-07-29
2010-08-05
2010-08-12
2010-08-19
2010-08-26
2010-09-02
2010-09-16
2010-09-23
2010-10-14
2010-10-21
2010-11-18
2010-11-25
2010-12-02
2010-12-09
2010-12-16
2011
2011-01-06
2011-01-13
2011-02-10
2011-02-17
2011-03-24
2011-04-07
2011-04-14
2011-04-28
2011-05-19
2011-06-09
2011-06-16
2011-06-30
2011-07-07
2011-07-14
2011-07-21
2011-07-26
2011-07-28
2011-08-03
2011-08-11
2011-08-18
2011-08-25
2011-09-01
2011-09-08
2011-09-14
2011-09-15
2011-09-29
2011-10-06
2011-10-20
2011-11-24
2011-12-08
2012
2012-01-19
2012-03-15
2012-04-26
2012-05-31
2012-06-21
2012-11-29
2013
2013-04-18
2013-04-25
2013-05-09
2013-05-23
2013-06-20
2013-07-11
2013-08-08
2013-08-22
2013-11-16
2013-ProductNamespaces
2014
2014-01-09
2014-04-24
2014-10-23
2014-11-24
2014-12-22
2014-12-29
2015
2015-01-12
2015-01-19
2015-02-02
2015-03-30
2015-04-13
2015-04-27
2015-05-04
2015-05-18
2015-06-01
2015-06-15
2015-06-29
2015-07-13
2015-07-27
2015-08-10
2015-08-24
2015-09-07
2015-09-21
2015-10-05
2015-10-26
2015-11-09
2015-11-23
2015-12-14
2015-12-28
2016
2016-01-11
2016-02-01
2016-05-09
2016-05-30
2016-06-13
2016-08-15
2016-08-22
2016-10-10
2016-11-07
2016-11-14
2016-11-23
2016-11-30
2016-12-07
2016-12-14
2016-12-21
2017
2017-01-04
2017-02-22
2017-03-15
2017-09-12
2017-09-20
2017-09-27
2017-10-04
2017-10-11
2017-10-18
2017-10-25
2017-11-01
2017-12-06
2017-12-13
2017-12-20
2018
2018-01-03
2018-01-10
2018-01-17
2018-01-24
2018-01-31
2018-02-21
2018-03-07
2018-03-14
2018-03-21
2018-04-04
2018-04-18
2018-05-02
2018-05-23
2018-05-30
2018-06-06
2018-06-13
2018-07-04
2018-09-19
2018-09-26
2018-10-03
2018-10-10
2018-10-24
2018-11-14
2018-11-28
2018-12-05
2018-12-12
2018-12-19
2019
2019-02-13
2019-03-12
2019-03-20
2019-03-27
2019-04-03
2019-04-11
2019-04-17
2019-04-25
2019-05-01
2019-05-09
2019-05-15
2019-05-23
2019-05-29
2019-06-06
2019-06-12
2019-06-20
2019-06-26
2019-07-04
2019-07-10
2019-07-18
2019-07-24
2019-08-07
2019-08-15
2019-08-21
2019-08-29
2019-09-04
2019-09-12
2019-09-18
2019-09-26
2019-10-02
2019-10-10
2019-10-16
2019-10-24
2019-10-30
2019-11-21
2019-11-27
2019-12-05
2019-12-11
2019-12-19
2020
2020-01-06
2020-01-08
2020-01-16
2020-01-22
2020-01-30
2020-02-05
2020-02-13
2020-02-19
2020-02-27
2020-03-04
2020-03-12
2020-03-18
2020-03-26
2020-04-01
2020-04-09
2020-04-15
2020-04-23
2020-04-29
2020-05-07
2020-05-13
2020-05-21
2020-05-27
2020-06-04
2020-06-10
2020-06-18
2020-06-24
2020-07-02
2020-07-08
2020-07-16
2020-07-22
2020-07-30
2020-08-13
2020-08-19
2020-08-27
2020-09-02
2020-09-10
2020-09-16
2020-09-24
2020-09-30
2020-10-08
2020-10-14
2020-10-22
2020-10-28
2020-11-05
2020-11-11
2020-11-19
2020-11-25
2020-12-03
2020-12-09
2020-12-17
2021
2021-01-06
2021-01-20
2021-01-27
2021-02-03
2021-02-10
2021-02-17
2021-02-24
2021-03-03
2021-03-10
2021-03-24
2021-03-31
2021-04-07
2021-04-14
2021-04-21
2021-04-28
2021-05-05
2021-05-12
2021-05-19
2021-05-26
2021-06-02
2021-06-09
2021-06-16
2021-06-23
2021-06-30
2021-07-07
2021-07-14
2021-07-21
2021-07-28
2021-08-04
2021-08-11
2021-08-18
2021-08-25
2021-09-01
2021-09-08
2021-09-15
2021-09-22
2021-09-29
2021-10-13
2021-10-20
2021-10-27
2021-11-10
2021-11-17
2021-11-24
2021-12-01
2021-12-08
2021-12-15
2021-12-22
2022
2022-01-05
2022-01-12
2022-01-19
2022-01-26
2022-02-02
2022-02-09
2022-02-16
2022-02-23
2022-03-02
2022-03-09
2022-03-16
2022-03-23
2022-03-30
2022-04-06
2022-04-13
2022-04-20
2022-04-27
2022-05-04
2022-05-11
2022-05-18
2022-05-25
2022-06-01
2022-06-08
2022-06-15
2022-06-22
2022-06-29
2022-07-06
2022-07-13
2022-07-20
2022-07-27
2022-08-03
2022-08-10
2022-08-17
2022-08-24
2022-08-31
2022-09-07
2022-09-14
2022-09-21
2022-09-28
2022-10-05
2022-10-12
2022-10-19
2022-10-26
2022-11-09
2022-11-23
2022-11-30
2022-12-07
2022-12-14
2022-12-21
2022-12-28
2023
2023-01-11
2023-01-18
2023-01-25
2023-02-01
2023-02-08
2023-02-15
2023-02-22
2023-03-01
2023-03-08
2023-03-15
2023-03-22
2023-03-29
2023-04-12
2023-04-19
2023-04-26
2023-05-03
2023-05-10
2023-05-17
2023-05-24
2023-05-31
2023-06-07
2023-06-14
2023-06-21
2023-06-28
2023-07-05
2023-07-12
2023-07-19
2023-07-26
2023-08-02
2023-08-09
2023-08-16
2023-08-23
2023-08-30
2023-09-06
2023-09-13
2023-09-20
2023-09-27
2023-10-11
2023-10-18
2023-10-25
2023-11-01
2023-11-08
2023-11-15
2023-11-22
2023-11-29
2023-12-06
2023-12-13
2023-12-20
2024
2024-01-10
2024-01-17
2024-01-24
2024-01-31
2024-02-07
2024-02-14
2024-02-21
2024-02-28
2024-03-06
2024-03-13
2024-03-20
2024-03-27
2024-04-03
2024-04-10
2024-04-17
2024-04-24
2024-05-01
2024-05-08
2024-05-15
2024-05-22
2024-05-29
2024-06-05
2024-06-19
2024-06-26
2024-07-03
2024-07-10
2024-07-17
2024-07-24
2024-07-31
2024-08-07
2024-08-14
2024-08-21
2024-08-28
2024-09-04
2024-09-11
2024-09-18
2024-09-25
2024-10-02
2024-10-09
2024-10-16
2024-10-23
2024-10-30
2024-11-06
2024-11-13
2024-11-20
2024-11-27
2024-12-04
2024-12-11
2025
2025-01-08
2025-01-15
2025-01-22
2025-01-29
2025-02-05
2025-02-19
2025-02-26
2025-03-05
2025-03-12
2025-04-16
2025-04-23
2025-05-07
2025-05-14
2025-05-21
2025-05-28
2025-06-04
2025-06-11
2025-06-18
2025-07-02
2025-07-09
2025-07-16
2025-07-23
2025-07-30
2025-08-06
2025-08-13
2025-08-27
2025-09-03
2025-09-10
2025-09-17
2025-09-24
2025-10-01
2025-10-08
2025-10-15
2025-10-22
2025-11-05
2025-11-12
2025-11-19
2025-11-26
2025-12-03
2025-12-10
2025-12-17
2026
2026-01-14
2026-01-21
2026-02-04
2026-02-11
2026-02-18
2026-02-25
2026-03-04
2026-04-01
2026-04-15
2026-04-22
2026-04-29
2026-05-06
2026-05-27
2026-06-03
2026-06-10
2026-06-17
2026-06-24
2026-07-01
2026-07-08
2026-07-15
2026-07-22
2026-07-29
2026-08-05
2026-08-12
2026-08-19
2026-08-26
2026-09-02
2026-09-09
2026-09-16
2026-09-23
2026-09-30
Meetups
2013-Munich
2014-Munich
2015-Delft
2016-Helsinki
2017-Karlsruhe
2018-Lviv
2019-Trento
2021-Munich
2022-Delft
2023-Orihuela
2024-Karlsruhe
2025-Naples
2026-Paderborn
PQCryptoOpenVPN
Pages
AvoidRoutingConflicts
BridgingAndRouting
BridgingOverview
BuildingOnWindows
BuildingOpenVPN-GUI
BuildingTapWindows6
CertificateRevocationListExpired
CipherNegotiation
CodeRepositories
Compression
Concepts-Addressing
Concepts-Authentication
Concepts-PolicyRouting-Linux
Deprecated options
Easy Windows Guide
EasyRSA
EasyRSA3-OpenVPN-Howto
Fix for site-to-site OpenVPN on ubiquiti unifi routers
Getting help
Getting started with OpenVPN
Getting tap-windows
GettingEasyRsa
Hardening
HowPacketsFlow
How_does_PKI_work
IPv6
IgnoreRedirectGateway
Managing TAP-Windows drivers
NatHack
NonEnglishResources
OpenVPN software repos
OpenVPN-GUI-New
OpenVPN25_Windows_MSI_Unattended_Install
OpenVPN3Linux
OpenVPNBridging
OpenVPNInteractiveservice
Openvpn-systemd-use
OpenvpnBooks
OpenvpnLogosAndIcons
OverviewOfOpenvpn
PluginOverview
Pushing-DNS-to-clients
RelatedProjects
RoutedLans
Supported versions
Systemd
Tap rename script
TapRenameScript
Tapctl
Topology
TrafficObfuscation
UnprivilegedUser
Using-mbedtls
Using_Certificate_Chains
WikiCredentials
WindowsBrowsing
easy_rsa_fr
easyrsa-upgrade
reset-network-tcp-ip-stack
ReleaseHistory
Security Announcements
CCSInjection
CVE-2016-10229
CVE-2017-12166
CVE-2018-7544
CVE-2020-15078
CVE-2021-3547
CVE-2021-3606
CVE-2022-0547
CVE-2023-46849
CVE-2023-46850
CVE-2023-6247
CVE-2023-7235
CVE-2024-1305
CVE-2024-13454
CVE-2024-24974
CVE-2024-27459
CVE-2024-27903
CVE-2024-28882
CVE-2024-4877
CVE-2024-5198
CVE-2024-5594
CVE-2025-10680
CVE-2025-12106
CVE-2025-13086
CVE-2025-13751
CVE-2025-15497
CVE-2025-2704
CVE-2025-3908
CVE-2025-50054
CVE-2026-11604
CVE-2026-11771
CVE-2026-12932
CVE-2026-12996
CVE-2026-13117
CVE-2026-13122
CVE-2026-13379
CVE-2026-13698
CVE-2026-2738
CVE-2026-35058
CVE-2026-40215
CVE-2026-63649
CVE-2026-63650
CVE-2026-78043
CVE-2026-78221
CVE-2026-81738
CVE-2026-81830
CVE-2026-82312
CVE-2026-82325
CVE-2026-84226
CVE-2026-84256
CVE-2026-84471
CVE-2026-84732
DUHKattack
NSISBug1125
QuarkslabAndCryptographyEngineerAudits
SWEET32
SecurityAnnouncement-97597e732b
SecurityAnnouncement-FREAK
SecurityAnnouncement-f375aa67cc
SecurityOverview
SecurityVulnerabilities
TLSTripleHandshakeVulnerabilityAndOpenVPN
TapWindows6BufferOverflowVulnerability
TunnelCrack
UnquotedServicePathIn24WindowsInstallers
VORACLE
VulnerabilitiesFixedInOpenSSL1_0_1i
VulnerabilitiesFixedInOpenSSL1_0_1j
VulnerabilitiesFixedInOpenSSL1_0_1m
VulnerabilitiesFixedInOpenVPN243
heartbleed
An Otter Wiki
Concepts-Addressing
b1af79
Commit
b1af79
2025-03-18 12:36:10
Samuli Seppänen
: -/-
Pages/Concepts-Addressing.md
..
@@ 3,7 3,7 @@
This page discusses the concepts of addressing in OpenVPN.
-
## Addressing Basics for !Server/Client
+
## Addressing Basics for Server/Client
Addressing in OpenVPN depends on the [in use. The 3 types of possible server/client addressing styles are explained in the Topology page and are:
](/Pages/Topology)
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9
