Excel is trying to connect through port 53
- Thread starter czesetfan
- Start date
Please provide comments and solutions that are helpful to the author of this topic.
- Feb 25, 2017
- 2,512
Take a look at this tool. Might be interesting for you. You can also block outbound connections for Office applications.
FirewallHardening tool
FIREWALLHARDENING (new ver. 3.0.0.1, January 2024) FirewallHardening is a part of the Hard_Configurator project and can be used also as a standalone application among a few others included in the H_C_HardeningTools repository...
malwaretips.com
- Aug 17, 2014
- 10,210
Just take a look on this link below, explanation of Firewall port numbers.
List of TCP and UDP port numbers - Wikipedia
Should be no problem to block outbound connection for Excel unless it's required for certain functions of Excel, but that you will see when something with Excel doesn't work as it should...
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Thank you for your quick responses.
I'm rather interested in why Excel is trying to communicate on port 53. Does it need it for anything? It works normally even if I block it, so I guess it's not necessary.
I'm rather interested in why Excel is trying to communicate on port 53. Does it need it for anything? It works normally even if I block it, so I guess it's not necessary.
- Dec 21, 2017
- 478
is this only work if we use windows firewal, what if we have comodo firewall or kaspersky firewall?Take a look at this tool. Might be interesting for you. You can also block outbound connections for Office applications.
FirewallHardening tool
FIREWALLHARDENING (new ver. 3.0.0.1, January 2024) FirewallHardening is a part of the Hard_Configurator project and can be used also as a standalone application among a few others included in the H_C_HardeningTools repository...
- Feb 25, 2017
- 2,512
This is only for the Windows Firewall. If you are using Comodo or Kaspersky you need to add those rules manually.
Coming back to the topic. Does anyone know why Excel needs to connect via port 53?
It gets its DNS information from the OS, doesn't it?
It gets its DNS information from the OS, doesn't it?
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