telnet into a netgear switch?

David Birdsong david at
Mon Nov 25 23:42:21 UTC 2013

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:
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> 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 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?

> Jason

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