Ports

Ports

Hi there,

I am sure this has been asked before but an curious as to why all these ports need to be open?

Ports

Protocols

Services

Direction

135

TCP

RPC

Inbound and outbound

389

TCP and UDP

LDAP

Inbound and outbound

636

TCP

LDAP SSL

Inbound and outbound

3268

TCP

LDAP GC

Inbound and outbound

3269

TCP

LDAP GC SSL

Inbound and outbound

88

TCP and UDP

Kerberos

Inbound and outbound

53

TCP and UDP

DNS

Inbound and outbound

445

TCP and UDP

SMB

Inbound and outbound

25

TCP

SMTP

Inbound and outbound

464

TCP and UDP

Kerberos change/set password

Inbound and outbound

2535

UDP

DHCP

Inbound and outbound

67

UDP

DHCP

Inbound and outbound

137

UDP

NetLogon, NetBIOS Name Resolution

Inbound and outbound

138

UDP

NetLogon

Inbound and outbound

139

TCP

NetBIOS Session Service, NetLogon

Inbound and outbound

42

TCP

Host name server protocol

Inbound and outbound

593

TCP

RPC over HTTP

Inbound and outbound


 
For example, why does DHCP need to be open inbound/outbound?

Sorry if this has been asked/answered elsewhere.

Many thanks

Matt

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