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Network Wide Port Blocks

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We block the inbound traffic on the following ports, network wide for security reasons:
- 135 - 139 (NetBIOS)
- 445 (NetBIOS)
- 497 (Backup Software)
- 389 (LDAP)
- 68 (DHCP)
- 1433 - 1434 (SQL Server)
- 1025 (MS Scheduled Task Endpoint)

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