Re: Telnet on port 179

From: Charles Henson (chenson@gmail.com)
Date: Wed Oct 22 2008 - 22:56:08 ARST

To clarify, remember BGP is an application. Not a protocol. So if you
telnet to 179 and get a RST on the TCP 3 way handshake, then none of
the BGP related functions have anything to do at this point. Not sure
if ACLs filtering you would send a RST. I thought they just dropped
you and the remote end timed out but I could be mistaken. Again, if
I'm mis-stating anything please let me know.

On 10/22/08, 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
> 

-- 
Charles

Blogs and organic groups at http://www.ccie.net

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