Date: Fri, 29 Mar 2024 10:25:30 +0100 (CET)
Message-ID: <697304937.6412.1711704330294@k5115.pixsoftware.de>
Subject: Exported From Confluence
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Which ports and protocols must be activated for a VPN connectio=
n in a router or firewall?
Which ports and protocols must be activated for a VPN connection i=
n a router or firewall?
Description:
If a VPN-Router or VPN-Client (PPTP/IPsec) is behind the firewall in a loc=
al area network, the following ports and protocols must be released for the=
VPN connection to be established and for payload data to be transmitted:
LANCOM VPN-Router:
- IKE negotiation =3D UDP 500
- ESP encapsulating security payload (protocol 50) or
Optionally=
:
- AH authentication header (protocol 51)
- UPD port 4500 must be activated when using NAT-T
- UPD port 87 must be activated when using Dynamic VPN
LANCOM Advanced VPN Client:
- IKE negotiation =3D UDP 500
- ESP encapsulating security payload (protocol 50) or
Optionally=
:
- AH authentication header (protocol 51)
- UPD port 4500 must be activated when using NAT-T
Windows IPSec/PPTP function:
- PPTP negotiation =3D TCP 1723 (GRE is forwarded automatically with this =
entry)
- IKE negotiation =3D UDP 500
- GRE general routing encapsulation (protocol 47)
- ESP encapsulating security payload (protocol 50)
You can find a summary of ports and protocol numbers under www.iana.org
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