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CCNA FAQ: Virtual Private Networks

March 26, 2020 by Marques Brownlee

CCNA FAQ: Virtual Private Networks Q1. Your organization has just opened a new office in Detroit. You have existing offices in Phoenix, San Diego, and Albuquerque that are tied together using VPN technology. What physical or logical changes should you add to support the VPN connection to the new office? A. No new interfaces are needed. The VPN configuration needs only to be … [Read more...]

Filed Under: Cisco Tagged With: CCNA FAQ, Understanding VPN Connectivity, Virtual Private Networks, VPN, VPN Connectivity

VPN comes up even if there is a proxy-identity mismatch

June 21, 2016 by Marques Brownlee

This article discusses the scenario in which a VPN comes up even when there is a proxy-id mismatch (one of the proxy-ids is a subset of the other). This is expected behavior. Two SRX devices are directly connected. Configuration on the devices is as follows: Device-1: [email protected]# show security ipsec policy ipsecp { proposal-set standard; } vpn vpn1 { … [Read more...]

Filed Under: Juniper Tagged With: VPN

Troubleshooting auto-export with diagnostic commands

June 10, 2016 by Marques Brownlee

This article discusses the diagnostic commands available for troubleshooting auto-export. The auto-export statement is particularly useful for configuring overlapping VPNs—VPN configurations where more than one VRF routing instance lists the same community route target in its vrf-import policy. The auto-export statement finds out which routing tables to export routes from … [Read more...]

Filed Under: Juniper Tagged With: VPN, VRF, vrf-import policy

VPN local-address support in 12.1X44 & 12.1X45

June 9, 2016 by Marques Brownlee

This describes supported use of local-address for VPN gateways When the VPN egress interface has multiple IPs associated use of local-address can be used to select a specific IP from the egress interface for VPN use on a per VPN gateway basis When the VPN egress interface has multiple IPs, the default selection IP used to source VPN traffic is based upon the Primary … [Read more...]

Filed Under: Juniper Tagged With: VPN, VPN egress interface, VPN gateways, VPN local-address

DHCP assignment on a different subnet against a Microsoft DHCP server

June 8, 2016 by James Palmer

How to setup DHCP assignment on a different subnet, against a Microsoft DHCP server. The VPN connection profile is configured for DHCP; but the IP addresses are not assigned, when users get connected (nc.windows.app.23791). The Junos Pulse Secure Access Gateway (SA) is configured to provide VPN tunneling to users. In the VPN connection profile, the IP addresses are … [Read more...]

Filed Under: Juniper Tagged With: DHCP, Secure Access Gateway, VPN

VPN on Demand fails to launch from iPhone

May 25, 2016 by James Palmer

This article describes the workaround to be used when a VPN on Demand from the iPhone fails to launch. This issue is apparent under the following conditions: Users receive User authentication failed error message when VPN is launched from settings VPN on Demand fails and the error message plugin.error VPN disconnecting due to an authentication failure is displayed in … [Read more...]

Filed Under: Juniper Tagged With: iPhone, Junos Pulse, VPN

SHA2-256 compatibility on SRX branch series and other platforms

May 25, 2016 by Marques Brownlee

This article describes the issue of the SRX device, which has configured VPN with SHA2 in the IPsec proposal, being unable to decrypt the encrypted traffic; even though it has established the VPN tunnel. Junos and SSG have two generations of SHA2-256 algorithms; the first one uses the 96 bit-length data field and the second one uses the 128 bit-length data field. Due to … [Read more...]

Filed Under: Juniper Tagged With: IPsec proposal, Junos, SRX, SSG, VPN, VPN gateway, VPN tunnel

Junos Pulse for Android does not display the ‘Intranet’ link when connected to a VPN tunnel on a device running Android 4.0 and later

May 21, 2016 by Marques Brownlee

This article explains why Junos Pulse for Android does not display the Intranet link when connected to a VPN tunnel on a device running Android 4.0 and later. The Intranet link is not displayed by the Junos Pulse for Android application, when connected to a VPN tunnel on a device running Android 4.0 and later. This issue will occur when the following conditions are … [Read more...]

Filed Under: Juniper Tagged With: IPsec VPN, Junos Pulse, VPN, VPN tunnel

Can a static MAC address for the VPN Tunneling virtual adapter be configured?

May 18, 2016 by Marques Brownlee

Can a static MAC address for the VPN Tunneling virtual adapter be configured? This article explains why this is not supported. It is desired to assign a static MAC address for the VPN tunneling virtual adapter, either Junos Pulse or Network Connect, due to the requirement of third-party software. No, it is not possible to have a static MAC address for the VPN Tunneling … [Read more...]

Filed Under: Juniper Tagged With: Junos Pulse, Junos Pulse MAC, Network Connect, static MAC address, virtual adapter, VPN

Configuring VPN on Demand for iPhone/iPad

May 17, 2016 by Marques Brownlee

This article describes how to implement VPN on Demand for the iPhone/iPad. Configure VPN on Demand on iPhone/iPad. From the App Store, download Apple Configurator on a Mac OS X device. Certificate authentication MUST be configured on the Pulse Secure gateway. Client certificates need to be issued for each user to install on their device (Refer to #7 for installation … [Read more...]

Filed Under: Juniper Tagged With: Junos Pulse, OnDemandRules, VPN

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