------------------------------ 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: http://downloadcenter.netgear.com/en/product/JGS524E Jason
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?
http://downloadcenter.netgear.com/en/product/JGS524E
Jason
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@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?
http://downloadcenter.netgear.com/en/product/JGS524E
Jason
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). HTH
http://downloadcenter.netgear.com/en/product/JGS524E
Jason
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=
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
eS1vz0Gh_pp-vZ+sPRk9Td-1U0A34c3A6jdQ@mail.gmail.com> 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
On Mon, Nov 25, 2013 at 5:42 PM, 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?
http://downloadcenter.netgear.com/en/product/JGS524E
Jason
Ahh; I don't use windows either, but I keep a VM handy just in case I need it. jp
participants (4)
-
David Birdsong -
Geraint Jones -
Jason Pope -
Pedro Cavaca