[167006] in North American Network Operators' Group
Re: telnet into a netgear switch?
daemon@ATHENA.MIT.EDU (David Birdsong)
Mon Nov 25 23:51:42 2013
In-Reply-To: <CAE42oJowLwCA+=F4ATuDMruTfA5b2nguTg1h_S0MHps=UHa=oQ@mail.gmail.com>
Date: Mon, 25 Nov 2013 20:51:29 -0800
From: David Birdsong <david@imgix.com>
To: Pedro Cavaca <pmsac.nanog@gmail.com>
Cc: NANOG Mailing List <nanog@nanog.org>, Jason Pope <boards188@gmail.com>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Mon, Nov 25, 2013 at 5:18 PM, Pedro Cavaca <pmsac.nanog@gmail.com> wrote:
>
>
>
> On 25 November 2013 23:42, David Birdsong <david@imgix.com> wrote:
>
>> On Nov 25, 2013 1:51 PM, "Jason Pope" <boards188@gmail.com> wrote:
>> >
>> > ------------------------------
>> > Message: 2
>> > Date: Sun, 24 Nov 2013 18:47:09 -0800
>> > From: David Birdsong <david@imgix.com>
>> > To: nanog@nanog.org
>> > Subject: telnet into a netgear switch?
>> > Message-ID:
>> > <CAOMvUQfeM_Wnc=
>> eS1vz0Gh_pp-vZ+sPRk9Td-1U0A34c3A6jdQ@mail.gmail.com>
>> > Content-Type: text/plain; charset=ISO-8859-1
>> >
>> > Hey all, last night while at the datacenter I was in a pinch to extend a
>> > rack's LAN. I compromised and ran out to the local Fry's to buy whatever
>> > switch I could find so as to allow some configuration to happen while
>> > we wait for the real network gear to show up.
>> >
>> > I left before confirming I could access the switch remotely; it was very
>> > late and I was pretty groggy and hey, any network gear has to be
>> > telnet'table this day and age. Of course I was mostly wrong.
>> >
>> > The switch expects some signed payload before allowing a telnet
>> through. I
>> > found this: https://code.google.com/p/netgear-telnetenable/...but I'm
>> > having a hell of a time getting anything to respond.
>> >
>> > The most confounding part is the switch doesn't respond to a single SYN
>> > packet on low ports. I'm scanning all the ports now, but if nothing
>> shows
>> > up, I'm not sure what a payload is good for if the switch doesn't ACK a
>> > single SYN.
>> >
>> > I'm curious if anybody's got any tips besides not using Netgear in the
>> > datacenter.
>> >
>> > I have the MAC, I've IP'd it via DHCP, and the model number: JGS524E
>> and I
>> > can power cycle the switch as much as needed.
>> >
>> >
>> > P.S. long time listener, first time caller. i'm more of a sysadmin
>> > dangerously standing in for a proper network person.
>> > ------------------------------
>> >
>> > Seems to me that you need to use their "Switch Configuration Utility" to
>> > manage the switch. I didn't read all the documentation, but that is
>> what
>> > jumps out at me after a brief look. Maybe it will allow you to enable
>> > telnet or ssh from there. See the following link:
>> >
>>
>> No windows box handy, nor the desire for that hoop.
>>
>> ...but what magic is a windows app going to perform to wake up an
>> unresponsive TCP stack?
>>
>
> In view that the application needs to be run directly on the LAN, I'm not
> sure why you'd expect any TCP/IP like protocol - I asked a friend for a
> packet capture and it seems that the configuration utility is using RRCP (
> http://en.wikipedia.org/wiki/Realtek_Remote_Control_Protocol).
>
>
t'was finding this that made reassured me towards TCP/IP:
https://code.google.com/p/netgear-telnetenable/
but yes, i'd completely forgotten about other protocols.
HTH
>
>
>> > http://downloadcenter.netgear.com/en/product/JGS524E
>> >
>> > Jason
>>
>
>
