From: Hobbs (deadheadblues@gmail.com)
Date: Wed Oct 22 2008 - 22:55:13 ARST
if it was listening you would probably end of with a "blank" telnet session,
like when you telnet to port 80 on an http server...this is my assumption.
not sure of the goal of wanting to know if you are listening on port
179...why do you need to know this? maybe there is another to do it if we
know your goal.
Now I have heard of wanting to know if port 179 is being filtered somewhere
in your network, now you can be sure it isn't, because you are getting the
RST from the destination
On Wed, Oct 22, 2008 at 6:34 PM, Charles Henson <chenson@gmail.com> wrote:
> I believe if you sent an RST then you are not listening on 179. Else
> you would have completed the 3 way handshake and then failed on the
> protocol. Someone correct me if I'm wrong here.
>
>
> On 10/22/08, Mahesh Shivaswamy <maheshs.cisco@gmail.com> wrote:
> > I need to chk if SW1 is listening on port 179.
> >
> > rgds
> > Mahesh
> >
> >
> > On Wed, Oct 22, 2008 at 7:00 PM, Hobbs <deadheadblues@gmail.com> wrote:
> >
> >> what are you trying to test?
> >>
> >> On Wed, Oct 22, 2008 at 5:54 PM, Mahesh Shivaswamy <
> >> maheshs.cisco@gmail.com> wrote:
> >>
> >>> Hi,
> >>>
> >>> When I telnet on port 23 between R4 & SW1 its fine, but when I telnet
> on
> >>> port 179 I get a connection refuse msg, there is no access list on SW1.
> >>>
> >>> R4#telnet 154.1.47.7
> >>> Trying 154.1.47.7 ... Open
> >>>
> >>>
> >>> User Access Verification
> >>>
> >>> Password:
> >>>
> >>> R4#telnet 154.1.47.7 179
> >>> Trying 154.1.47.7, 179 ...
> >>> % Connection refused by remote host
> >>>
> >>> SW1#
> >>> 1d11h: tcp0: I LISTEN 154.1.47.4:18645 154.1.47.7:179 seq 2990396955
> >>> OPTS 4 SYN WIN 4128
> >>> 1d11h: TCP: sent RST to 154.1.47.4:18645 from 154.1.47.7:179
> >>>
> >>> SW1#sh run int vlan 47
> >>> Building configuration...
> >>>
> >>> Current configuration : 61 bytes
> >>> !
> >>> interface Vlan47
> >>> ip address 154.1.47.7 255.255.255.0
> >>> end
> >>>
> >>> Any suggestion what is the issue, this is the only way I can test, any
> >>> suggestion ?
> >>>
> >>> rgds
> >>> Mahesh
> >>>
> >>>
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>
> --
> Charles
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