VMware error with networking

If you are facing networking issues when opening or running a vmware Virtual Machine it could be due to Network Adapter settings.

The Virtual Machine opens up fine however there is no network connectivity between this VM (the guest OS) and Host machine. The networking for the Host machine is fine and it can connect to the local LAN or internet. Now if this is the case, then one needs to investigate the guest Virtual Machine's Network Adapter.
aa

Above figure shows the current Network Adapter settings for guest VM. This shows that the guest VM is connected to the Host machine via Bridged Network Adapter. What this means is that the guest Virtual Machine is now accessing the Local network directly - of course it can only do that by sharing the Host machine's network adapter. Hence, it can obtain its own independent IP address from the Local network if the Local network has DHCP enabled. So the guest VM will appear as another machine on the subnet as shown in below figure.
The Host machine is connected to the Local Area Network via its own network adapter. In Bridged mode, the Guest Machine shares the Host's network adapter and hence is able to independently connect to the LAN. 







However, even though if your settings are similar to the above figure, the guest VM may be unable to communicate with the Local network or even the Host machine. You may try to restart the guest VM if that helps, if not then you may have to check your VMnet0 settings. This can be checked via the Virtual Network Editor provided by VMware. It shows up as below- I had to reset to "Restore Defaults" and now it shows up as below. It shows up as Name - VMnet0, Type - Bridged, External Connection - name of the LAN card/controller (or Wifi controller).



Below shows the Bridged mode selection and its VMnet information. The VMnet0 is for Bridged type of network connection, whereas VMnet1 is for Host-only connection where the guest machine can only communicate or network with the Host machine, and VMnet8 is for NAT where the guest machine shares the Host machine's IP address. In NAT mode all connections coming or originating from the guest machine will have the same IP address of the Host machine. Using Bridged mode is best to use when your guest machine needs to be connected to external network like Internet and needs to have its own IP address.












Above figure shows the Virtual Network Editor. You can access it by opening Edit >> Virtual Network Editor. Also if you have VMware workstation installed then the "Virtual Network Editor" shortcut is available via Windows >> Start >> Programs, as shown in figure below.










The "Virtual Network Editor" can be directly accessed via above Start >> Programs as well. Either way as you launch this Network Editor, check your settings for VMnet0 and VMnet8. (The above figure is from a gues VM that is using Bridged network settings). Note that "Virtual Network Editor" can only be accessed by Administrator. Of course VMnet0 should always be available.

After Restore to Defaults (as shown above) was done, and guest VM was restarted, it was able to communicate with the local network. Also in order to access "Virtual Network Editor", one has to shutdown the guest VM.

Note: If you are frequently importing Virtual Machines, you may find the imported VM may again not be able to communicate with the local network or the Host machine. In this case, then consider again using the option of "Restore Default" via Virtual Network Editor.

Comments

Post a Comment

Popular posts from this blog

VMware fix for Invalid manifest and ova file import failed errors

Image
Recently we got a OVA file for a virtual machine. The vendor instructions were to import the ova file in vmware Workstation, Player for Windows/Linux, Fusion for Mac, and VirtualBox as well.  The instructions were to take the available package and launch the VM with VMware workstation. The package contained  Module.mf, Module.ovf and Module-disk.vmdk and a Module.ova file. The .mf and .ovf file were 2 KB each whereas the vmdk was several gigs. The package also contained a Module.ova file which was several gigs as well. OVF           Open Virtualization Format MF             Manifest file VMDK       Virtual Machine Disk OVA           Open Virtualization Appliance The ovf file is a xml file that contains metadata for the ovf package The mf file contains the SHA1 hash codes of all files in the package The vmdk file is the disk image of the virtual machine,  VMware Workstation or VirtualBox. (vmdk format was originally developed by VMware and is an open format now). All of
Read more

SOAPUI - import certificate

Image
Note: SoapUI has two versions, one is open source and second Professional version. The open source can be download here . (confirmed link 12/19/2018). SSL Handshake issue:   There is an Issue in SoapUI version 5.3.0 (and 5.2.0 version) with SSL handshake error. It was resolved by updating below in vmoptions file ( refer here ). However, the error that shows up while trying to load wsdl is "Error loading WSDL" as below The fix is to Enable TLS 1.2 protocol for SOAP/REST calls in SoapUI, by ammending the vmoptions file to add the directive for TLS as (-Dsoapui.https.protocols=TLSv1.2). Refer here . Update: Version 5.5.0 does not have this issue. If you are on 5.3.0 better upgrade to 5.5.0 which is available now (Feb 2019). I had above issue as well as another issue reaching to https endpoint. Upgrade to 5.5.0 resolved issue. Select "Check for updates" under the Help menu and you will get option for upgrade. Select upgrade current version and accept all defaul
Read more

Centrally Managed Users (CMU) - New Feature in Oracle Database 18c

Image
Centrally Managed Users (CMU) Centrally Managed Users or CMU is a new feature introduced since Oracle DB 18c which allows simplified database user management through integration with Microsoft Active Directory (AD). Beginning with Oracle Database release 18c, version 18.1 and later supports direct integration with Microsoft Active Directory (AD) using the new centrally managed users capability. CMU allows the Oracle database to perform user authentication and authorization directly against AD. Benefits of CMU With centrally managed users, users accessing the database can be centrally managed to improve an organization's security posture. An enterprise user (a user in Microsoft Active Directory) can be exclusively mapped to a database account, or many enterprise users (in an Microsoft Active Directory group) can be mapped to a shared account in the database. Microsoft Active Directory groups can also be mapped to a database global role, which provides users with additional privilege
Read more