telnet into a netgear switch?

Geraint Jones geraint at
Mon Nov 25 23:50:01 UTC 2013

It could be any number of things, APC for example need a vendor option set
in DHCP or a ³Magic² ping. It could be that the app just talks to it on L2
like Microtik¹s. I suspect the windows app will be your only option.
Geraint Jones

On 26/11/13 12:42 pm, "David Birdsong" <david at> wrote:

>On Nov 25, 2013 1:51 PM, "Jason Pope" <boards188 at> wrote:
>> ------------------------------
>> Message: 2
>> Date: Sun, 24 Nov 2013 18:47:09 -0800
>> From: David Birdsong <david at>
>> To: nanog at
>> Subject: telnet into a netgear switch?
>> Message-ID:
>>         <CAOMvUQfeM_Wnc=
>eS1vz0Gh_pp-vZ+sPRk9Td-1U0A34c3A6jdQ at>
>> 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: 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
>> 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
>> 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?
>> Jason

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