"Failed to access <Server>" when trying to select remote resources located on a remote server behind a NAT Firewall or "Access denied" when trying to restore/backup remote servers.

Article:TECH63925

Created: 2010-02-08

Updated: 2010-02-08

Article URL http://www.symantec.com/docs/TECH63925

Article Type
Technical Solution

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Problem

"Failed to access " when trying to select remote resources located on a remote server behind a NAT Firewall or "Access denied" when trying to restore/backup remote servers.

Error

"Failed to access ". The directory of file was not found. "Access denied."

Solution

After allowing all traffic to pass through a firewall between the media server and remote server, a user defined selection has been added to a backup selection list. When attempting to browse the user defined selection, the following error may be generated:

Using Backup Exec's interactive debugger, SGMON, the following Windows errors were found while connecting to a remote server:

WARNING: MSNetEstablishConnection error 1203 from WNetAddConnection2 for connection to \\10.1.1.2

DSEnumerator failed with -536836945: The directory or file was not found, or could not be accessed.

Using the command line utility, net.exe, determine the reason for the failure:

net helpmsg 1203

Returns:

No network provider accepted the given network path.

The following steps can be used to resolve the error:

1. Retrieve all of the IP settings from the Backup Exec media server and remote server using IPCONFIG

2. Verify that name resolution is working by using NSLOOKUP.

Examples of NSLOOKUP queries.

nslookup myserver
nslookup 10.0.0.22

3. Once name resolution has been verified, continue to test network connectivity by using PING. Ensure that the real IP address of the remote server can be pinged via a command prompt on the media server. If the ping fails to return a reply, then there are two possible solutions:

1. Enable port forwarding on the firewall:

To do this consult the network administrator, firewall documentation, or firewall vendor for further information.

2. Add a static route from the Backup Exec media server to the firewall using the command line:

ROUTE ADD

Example:

ROUTE ADD 157.0.0.0 MASK 255.0.0.0 157.55.80.1 METRIC 3 IF 2

Additional instructions for the ROUTE command are available in Microsoft Technote:

http://technet.microsoft.com/en-us/library/cc757323.aspx

Additional instructions for using NSLOOKUP are available in Microsoft Technote:

http://support.microsoft.com/kb/200525/en-us

Note: The troubleshooting instructions provided are not exclusive to any particular firewall vendors or network devices. Identical error messages noted above have been seen in other various customer environments with different firewalls and network configurations.