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Jun 4, 2013

We have the Oracle 11g XE database installed on a Windows 7 laptop. The Oracle XE database runs fine when the laptop not connected to a network, when connected to our corporate lan, or when connected to a cable-modem. However, when running under the Cisco AnyConnect VPN client, we are unable to connect to the Oracle XE service.
I have tried to resolve this, but am stuck. I do not if this issues is caused by:
1. There is no IPv6 address listed for the AnyConnect VPN (from ipconfig /all)?
2. Something regarding split-tunnelling that must be configured on the VPN?
3. Can the Oracle XE database run under an SSL VPN?
Below is the output of when I try to connect the Oracle XE service via sqlplus.
**************************
The OracleXETNSListener service is starting.
The OracleXETNSListener service was started successfully.
The OracleServiceXE service is starting..............
The OracleServiceXE service was started successfully.
C:ProgramDataoraclexeapporacleproduct11.2.0serverin>sqlplus system/password@XE
SQL*Plus: Release 11.2.0.2.0 Production on Fri May 31 07:03:24 2013
Copyright (c) 1982, 2010, Oracle. All rights reserved.
ERROR:
ORA-12546: TNS:permission denied
Enter user-name:
**************************
listeneralertlog,xml
<msg time='2013-05-31T07:03:24.950-04:00' org_id='oracle' comp_id='tnslsnr'
type='UNKNOWN' level='16' host_id='DEV-M-137GF'
host_addr='fe80::2884:a03d:5286:7996%21'>
<txt>31-MAY-2013 07:03:24 * (CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=XE)(CID=(PROGRAM=C:ProgramDataoraclexeapporacleproduct11.2.0serverinsqlplus.exe)(HOST=DEV-M-137GF)(USER=ptavolet))) * (ADDRESS=(PROTOCOL=tcp)(HOST=10.99.8.39)(PORT=56324)) * establish * XE * 12514
[code].........
**************************
listener racelistener.log file
Started with pid=3688
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=.pipeEXTPROC1ipc)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=DEV-M-137GF.paychex.com)(PORT=1521)))
[code]......
**************************
C:ProgramDataoraclexeapporacleproduct11.2.0serverin>lsnrctl status
LSNRCTL for 32-bit Windows: Version 11.2.0.2.0 - Production on 31-MAY-2013 07:07:43
Copyright (c) 1991, 2010, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for 32-bit Windows: Version 11.2.0.2.0 - Production
Start Date 31-MAY-2013 07:01:12
Uptime 0 days 0 hr. 6 min. 31 sec
[code].......
The command completed successfully
**************************
C:ProgramDataoraclexeapporacleproduct11.2.0serverin>lsnrctl service
LSNRCTL for 32-bit Windows: Version 11.2.0.2.0 - Production on 31-MAY-2013 07:08:13
Copyright (c) 1991, 2010, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1)))
Services Summary...
Service 'CLRExtProc' has 1 instance(s).
Instance 'CLRExtProc', status UNKNOWN, has 1 handler(s) for this service...
Handler(s):
'DEDICATED' established:0 refused:0
LOCAL SERVER
Service 'PLSExtProc' has 1 instance(s).
Instance 'PLSExtProc', status UNKNOWN, has 1 handler(s) for this service...
Handler(s):
'DEDICATED' established:0 refused:0
LOCAL SERVER
The command completed successfully

This topic provides a route-based configuration for a Cisco IOS device. The configuration was validated using a Cisco 2921 running IOS version 15.4(3)M3.

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Oracle provides configuration instructions for a set of vendors and devices. Make sure to use the configuration for the correct vendor.

If the device or software version that Oracle used to verify the configuration does not exactly match your device or software, the configuration might still work for you. Consult your vendor's documentation and make any necessary adjustments.

If your device is for a vendor not in the list of verified vendors and devices, or if you're already familiar with configuring your device for IPSec, see the list of supported IPSec parameters and consult your vendor's documentation for assistance.

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VPN Connect is the IPSec VPN that Oracle Cloud Infrastructure offers for connecting your on-premises network to a virtual cloud network (VCN).

The following diagram shows a basic IPSec connection to Oracle Cloud Infrastructure with redundant tunnels. IP addresses used in this diagram are for example purposes only.

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Best Practices

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This section covers general best practices and considerations for using VPN Connect.

Configure All Tunnels for Every IPSec Connection

Oracle deploys two IPSec headends for each of your connections to provide high availability for your mission-critical workloads. On the Oracle side, these two headends are on different routers for redundancy purposes. Oracle recommends configuring all available tunnels for maximum redundancy. This is a key part of the 'Design for Failure' philosophy.

Have Redundant CPEs in Your On-Premises Network Locations

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Each of your sites that connects with IPSec to Oracle Cloud Infrastructure should have redundant edge devices (also known as customer-premises equipment (CPE)). You add each CPE to the Oracle Console and create a separate IPSec connection between your dynamic routing gateway (DRG) and each CPE. For each IPSec connection, Oracle provisions two tunnels on geographically redundant IPSec headends. For more information, see the Connectivity Redundancy Guide (PDF).

Routing Protocol Considerations

When you create an IPSec VPN, it has two redundant IPSec tunnels. Oracle encourages you to configure your CPE to use both tunnels (if your CPE supports it). Note that in the past, Oracle created IPSec VPNs that had up to four IPSec tunnels.

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The following two routing types are available, and you choose the routing type separately for each tunnel in the IPSec VPN:

  • BGP dynamic routing: The available routes are learned dynamically through BGP. The DRG dynamically learns the routes from your on-premises network. On the Oracle side, the DRG advertises the VCN's subnets.
  • Static routing: When you set up the IPSec connection to the DRG, you specify the particular routes to your on-premises network that you want the VCN to know about. You also must configure your CPE device with static routes to the VCN's subnets. These routes are not learned dynamically.
  • Policy-based routing: When you set up the IPSec connection to the DRG, you specify the particular routes to your on-premises network that you want the VCN to know about. You also must configure your CPE device with static routes to the VCN's subnets. These routes are not learned dynamically.

For more information about routing with VPN Connect, including Oracle recommendations on how to manipulate the BGP best path selection algorithm, see Routing for the Oracle IPSec VPN.

Other Important CPE Configurations

Ensure access lists on your CPE are configured correctly to not block necessary traffic from or to Oracle Cloud Infrastructure.

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If you have multiple tunnels up simultaneously, you may experience asymmetric routing. To allow for asymmetric routing, ensure that your CPE is configured to handle traffic coming from your VCN on any of the tunnels. For example, you need to disable ICMP inspection, configure TCP state bypass, and so on. For more details about the appropriate configuration, contact your CPE vendor's support. To configure routing to be symmetric, refer to Routing for the Oracle IPSec VPN.