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Thread: Port forwarding

  1. #1
    Rick
    Guest

    Port forwarding

    What ports do I need to forward
    from a NAT router?

    Here's what I have so far:
    FTP: 20-21
    mstsc: 3397-3391
    FTPS 989-990
    VPN: 1701-1723
    IKE: 500;nat-t:4500; esp: 50; ssl 443
    ?do we need "private": 49151-65535?
    ?do we need smtp: 25 if we do NOT run an SMTP server?
    others?



  2. #2
    iggster
    Guest

    Re: Port forwarding

    On 6/26/2010 8:24 AM, Rick wrote:
    > What ports do I need to forward
    > from a NAT router?
    >
    > Here's what I have so far:
    > FTP: 20-21
    > mstsc: 3397-3391
    > FTPS 989-990
    > VPN: 1701-1723
    > IKE: 500;nat-t:4500; esp: 50; ssl 443
    > ?do we need "private": 49151-65535?
    > ?do we need smtp: 25 if we do NOT run an SMTP server?
    > others?
    >
    >


    It depends. Since you mentioned "from a NAT" router, I assume you are
    not serving any of those an just want to reach those services somewhere.
    In that case you do not need to forward anything. Moreover your
    forwarding exposes your computer(s) to attacks. Especially RDC ports.
    If I am wrong and you do have services inside and want to open them to
    outside users, then what you open depends on what you service. You
    should not and I repeat you should not open ports you do not use and
    protect.
    So, you should not open open the SMTP port if you do not run a
    mail-relay server inside.
    On another note, if you serve FTP, make sure that it is handled properly
    by the router or use passive FTP.

    --- news://freenews.netfront.net/ - complaints: news@netfront.net ---

  3. #3
    Rick
    Guest

    Re: Port forwarding

    iggster wrote:
    > On 6/26/2010 8:24 AM, Rick wrote:
    >> What ports do I need to forward
    >> from a NAT router?
    >>
    >> Here's what I have so far:
    >> FTP: 20-21
    >> mstsc: 3397-3391
    >> FTPS 989-990
    >> VPN: 1701-1723
    >> IKE: 500;nat-t:4500; esp: 50; ssl 443
    >> ?do we need "private": 49151-65535?
    >> ?do we need smtp: 25 if we do NOT run an SMTP server?
    >> others?
    >>
    >>

    >
    > It depends. Since you mentioned "from a NAT" router, I assume you are
    > not serving any of those an just want to reach those services somewhere.
    > In that case you do not need to forward anything. Moreover your
    > forwarding exposes your computer(s) to attacks. Especially RDC ports.
    > If I am wrong and you do have services inside and want to open them to
    > outside users, then what you open depends on what you service. You
    > should not and I repeat you should not open ports you do not use and
    > protect.
    > So, you should not open open the SMTP port if you do not run a
    > mail-relay server inside.
    > On another note, if you serve FTP, make sure that it is handled properly
    > by the router or use passive FTP.
    >
    > --- news://freenews.netfront.net/ - complaints: news@netfront.net ---


    That's an affirmative!


  4. #4
    Rick
    Guest

    Re: Port forwarding

    Rick wrote:
    > What ports do I need to forward
    > from a NAT router?
    >
    > Here's what I have so far:
    > FTP: 20-21
    > mstsc: 3397-3391
    > FTPS 989-990
    > VPN: 1701-1723
    > IKE: 500;nat-t:4500; esp: 50; ssl 443
    > ?do we need "private": 49151-65535?
    > ?do we need smtp: 25 if we do NOT run an SMTP server?
    > others?
    >


    Forgot about time update on port 123





  5. #5
    iggster
    Guest

    Re: Port forwarding

    On 6/28/2010 11:31 AM, Rick wrote:
    > Rick wrote:
    >> What ports do I need to forward
    >> from a NAT router?
    >>
    >> Here's what I have so far:
    >> FTP: 20-21
    >> mstsc: 3397-3391
    >> FTPS 989-990
    >> VPN: 1701-1723
    >> IKE: 500;nat-t:4500; esp: 50; ssl 443
    >> ?do we need "private": 49151-65535?
    >> ?do we need smtp: 25 if we do NOT run an SMTP server?
    >> others?
    >>

    >
    > Forgot about time update on port 123
    >
    >
    >
    >

    I thought I answered the question in my post. Did you read it?

    --- news://freenews.netfront.net/ - complaints: news@netfront.net ---

  6. #6
    Rick
    Guest

    Re: Port forwarding

    iggster wrote:
    > On 6/28/2010 11:31 AM, Rick wrote:
    >> Rick wrote:
    >>> What ports do I need to forward
    >>> from a NAT router?
    >>>
    >>> Here's what I have so far:
    >>> FTP: 20-21
    >>> mstsc: 3397-3391
    >>> FTPS 989-990
    >>> VPN: 1701-1723
    >>> IKE: 500;nat-t:4500; esp: 50; ssl 443
    >>> ?do we need "private": 49151-65535?
    >>> ?do we need smtp: 25 if we do NOT run an SMTP server?
    >>> others?
    >>>

    >>
    >> Forgot about time update on port 123
    >>
    >>
    >>
    >>

    > I thought I answered the question in my post. Did you read it?
    >
    > --- news://freenews.netfront.net/ - complaints: news@netfront.net ---



    Yes I did; but you didn't mention port 123.



  7. #7
    Rick
    Guest

    Re: Port forwarding

    iggster wrote:
    > On 6/28/2010 11:31 AM, Rick wrote:
    >> Rick wrote:
    >>> What ports do I need to forward
    >>> from a NAT router?
    >>>
    >>> Here's what I have so far:
    >>> FTP: 20-21
    >>> mstsc: 3397-3391
    >>> FTPS 989-990
    >>> VPN: 1701-1723
    >>> IKE: 500;nat-t:4500; esp: 50; ssl 443
    >>> ?do we need "private": 49151-65535?
    >>> ?do we need smtp: 25 if we do NOT run an SMTP server?
    >>> others?
    >>>

    >>
    >> Forgot about time update on port 123
    >>
    >>
    >>
    >>

    > I thought I answered the question in my post. Did you read it?
    >
    > --- news://freenews.netfront.net/ - complaints: news@netfront.net ---


    You also didn't tell me about Nat-t for traversal of NAT.



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