Do I need these ports open?
Simon Slater
pyevet at aapt.net.au
Fri Apr 20 01:09:11 UTC 2007
On Wed, 2007-04-18 at 21:58 -0500, Justin W wrote:
> Simon Slater wrote:
> > Hi all,
> >
> > Just a quick question arising from following another thread. Here is
> > the result of nmap on a FC6 box:
> >
> > $ nmap localhost
> >
> > Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2007-04-18 14:10
> > EST
> > Interesting ports on localhost.localdomain (127.0.0.1):
> > Not shown: 1670 closed ports
> > PORT STATE SERVICE
> > 22/tcp open ssh
> > 25/tcp open smtp
> > 111/tcp open rpcbind
> > 139/tcp open netbios-ssn
> > 445/tcp open microsoft-ds
> > 631/tcp open ipp
> > 670/tcp open unknown
> > 696/tcp open unknown
> > 946/tcp open unknown
> > 2049/tcp open nfs
> >
> > Nmap finished: 1 IP address (1 host up) scanned in 2.036 seconds
> > $
> >
> > What are the 3 "unknown" open ports? Also I cannot find rpcbind,
> > netbios-ssn nor microsoft-ds under System>Services. What are these
> > services for?
> >
> > Thanks
> > Simon
> >
> I don't have experience with the 3 unknown port numbers off the top of
> my head, but I do know that rpcbind is the port portmap uses to
> communicate rpc services over a network. NFS versions two and three
> depend on portmap being accessible, but version four doesn't require it
> (if I remember correctly, but having it open does help some tools you
> may want to use). Ports 139 and 445 are both used by samba for windows
> sharing (139 being part of the NetBIOS naming system and 445 being the
> actual data port).
>
> I hope this clears up some confusion for you.
>
> Justin
>
Thanks, yes it does.
Simon
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