CCTV how to find ip of dvr

UrbanFret

Right this is a long shot but here goes. A neighbour (a farmer) had a system installed for monitoring his cows during the calving season. He had 4 cameras connected to a grundig dvr (a few years old now), anyway he used to be able to view the feeds on his phone through GDviewer on his mobile. His internet provider was eircom. He has since changed to NET1 broadband and he can no longer log in to view his cameras. I know whats wrong in that there would have been a static ip set on the dvr box, however how do i get logged into that box to change it or view it. It is connected to the router by lan cable but when i run Fing it does not show up as one of the devices connected to the network. .
Oh and the guy that installed it has emigrated to Australia and we can't get in contact.:(:(

bonzodog2

Your router should be able to tell you the IPs of connected devices (don't know Net1 - whats router model?)
ipconfig/all in a command prompt will tell you router IP ("Default Gateway")

edit: router may only tell you about DHCP (non-static) IPs

UrbanFret

bonzodog2 wrote: »

Your router should be able to tell you the IPs of connected devices (don't know Net1 - whats router model?)
ipconfig/all in a command prompt will tell you router IP ("Default Gateway")

edit: router may only tell you about DHCP (non-static) IPs

i think net 1 router gives ips in the range of 192.168.88.190 and so on. The router ip is 192.168.88.1 . i need to somehow.log into the dvr to change up to something above 192.168.88.198. However i cant.. log into it without knowing what it is

bonzodog2

Maybe the old router used a different range, eircom routers would normally use 192.168.1.x
You could make a batch file with a load of ping commands, covering that range, and search the output for responses

UrbanFret

bonzodog2 wrote: »

Maybe the old router used a different range, eircom routers would normally use 192.168.1.x
You could make a batch file with a load of ping commands, covering that range, and search the output for responses

im afraid i dont know how to do that. If i brought it into my house and connected it.im with eircom. Would i find it then?

TheChizler

Download wireshark to a laptop, plug it directly into the ethernet port of the DVR, and look for any packets coming out of the DVR, particularly and ARP or DHCP frames which would contain its IP address.

Alternatively download ZenMap and do a ping scan the 192.168.1.x/24 range which is the normal range eircom routers use.

I missed that you used Fing. Change your phone's IP address to something on the above range and do a scan again.

srdjan.rosic

the 192.168.88.1 is a default ip that mikrotik/routeros/routerboard routers/network equipment has.

you should be able to reset it, and then log-in and reconfigure it anyway you want.

dr.fuzzenstein

bonzodog2 wrote: »

Maybe the old router used a different range, eircom routers would normally use 192.168.1.x
You could make a batch file with a load of ping commands, covering that range, and search the output for responses

If the IP range has changed and no longer corresponds with the camera you can ping the entire range from 0 to 255 all day long and never get a return.
Best way is to find a manual for the camera system and find out how to do initial setup, there should be a way to do a factory reset, this will reset the camera to it's default IP, hook a laptop up to it directly (configured in the corresponding range) and then you can log in and change it to the correct range.
Or, if you're lucky, factory reset will reactivate DHCP on the camera and it will pull itself an IP and become visible on the network, so run an arp -a to get the IP.

TheChizler

dr.fuzzenstein wrote: »

If the IP range has changed and no longer corresponds with the camera you can ping the entire range from 0 to 255 all day long and never get a return.

It's on a static IP so if they change the device they're using to look for it to the same range they'll be able to find it.

I'd avoid factory resetting as it could be a nightmare to reconfigure the entire setup.

TallGlass

FYI, your issue is not the static IP to the camera. It will work with DHCP, but it seems like you have not enabled port forwarding on the router so that it can connect to outside the network.

UrbanFret

Thanks for all the replies guys. Ill have another crack monday and see how i get on. Thanks again

dr.fuzzenstein

TheChizler wrote: »

It's on a static IP so if they change the device they're using to look for it to the same range they'll be able to find it.

Yes, but that is of course the tricky bit. If that IP is unknown, they could be looking for a long time. One good option could be to download or look for the manual for the camera system and follow the initial setup routine.
Of course one way could be to either set up 192.x.x.x/8 or 10.x.x.x/8 and connect directly, that should cover almost all ranges.

TheChizler

dr.fuzzenstein wrote: »

Yes, but that is of course the tricky bit. If that IP is unknown, they could be looking for a long time. One good option could be to download or look for the manual for the camera system and follow the initial setup routine.
Of course one way could be to either set up 192.x.x.x/8 or 10.x.x.x/8 and connect directly, that should cover almost all ranges.

Yes but as it was on an eircom router the nerwork was more than likely left unchanged on 192.168.1.x. If that fails I'd capture everything coming out of the DVR to see can I learn anything before doing anything as drastic as a factory reset or initial setup.

dr.fuzzenstein

TallGlass wrote: »

FYI, your issue is not the static IP to the camera. It will work with DHCP, but it seems like you have not enabled port forwarding on the router so that it can connect to outside the network.

Good point. He could have both issues, because he can't even log into the web GUI. First it would have to work internally.

dr.fuzzenstein

TheChizler wrote: »

Yes but as it was on an eircom router the nerwork was more than likely left unchanged on 192.168.1.x. If that fails I'd capture everything coming out of the DVR to see can I learn anything before doing anything as drastic as a factory reset or initial setup.

Good starting point. I don't know if wireshark will capture anything that is outside the IP range of the machine it's on, since the network card might just drop the packets.

TheChizler

dr.fuzzenstein wrote: »

Good starting point. I don't know if wireshark will capture anything that is outside the IP range of the machine it's on, since the network card might just drop the packets.

Wireshark captures ALL.

I have a terrible habit of changing the static IPs of prototypes at work and not recording the change somewhere. Wireshark is a lifesaver.

ED E

Arp -a will find it ladies.

http://i.stack.imgur.com/G4Npq.png

Once you've found it you'll need to forward two ports to it, 80 for browsers and 5xxx for mobiles(the app). This requires he isn't on CGN with Net1 and either needs to purchase a static WAN IP from them or use a dynamic DNS provider like No-IP.

TallGlass

Also if you log into the DVR. In the settings it should say either the IP it's using or the MAC. If you get the MAC, then do a ARP -a from the CMD youll get the IP.

dr.fuzzenstein

TallGlass wrote: »

Also if you log into the DVR. In the settings it should say either the IP it's using or the MAC. If you get the MAC, then do a ARP -a from the CMD youll get the IP.

Well, that's the tricky bit without knowing the IP!

dr.fuzzenstein

TheChizler wrote: »

Wireshark captures ALL.

I have a terrible habit of changing the static IPs of prototypes at work and not recording the change somewhere. Wireshark is a lifesaver.

Cool, will try that myself.

TheChizler

ED E wrote: »

Arp -a will find it ladies.

I'm genuinely at a loss as to how that displayed something from a different network in the arp table. Was convinced it built it only from the same LAN plus local internal stuff.

TallGlass

dr.fuzzenstein wrote: »

Well, that's the tricky bit without knowing the IP!

I mean as in physically log into the DVR.

dr.fuzzenstein

TallGlass wrote: »

I mean as in physically log into the DVR.

OK, was thinking of web GUI.
OP, let us know what make and model the DVR is and we'll know more about it, because it's all a bit of guesswork right now.

UrbanFret

dr.fuzzenstein wrote: »

OK, was thinking of web GUI.
OP, let us know what make and model the DVR is and we'll know more about it, because it's all a bit of guesswork right now.

I will do when i get back to it. It will be monday now im afraid.

glynf

If its an older Grundig DVR, may not have a web GUI so it may be easier plugging in a monitor-possibly VGA-then search online for the default/admin user name and password. Most people don't bother changing it anyway, so you may be lucky. Log in and go to the network settings, chances are the app is not seing it as you may need to open a few ports on the new router.

ED E

TheChizler wrote: »

I'm genuinely at a loss as to how that displayed something from a different network in the arp table. Was convinced it built it only from the same LAN plus local internal stuff.

ARP works primarily on L2, it finds whats physically close not logically, and those addresses are reserved. 169 is self assigned, 224 is multicast and 255 is broadcast.

denismc

I don't have a Grundig PVR but mine is hooked up to an pc monitor via a vga cable and I access the menu through this. I think mine has a 4 digit pin and the default is 1234 or 0000 so your model may have a similar setup. Bit of a long shot but maybe worth a try.

TheChizler

ED E wrote: »

ARP works primarily on L2, it finds whats physically close not logically, and those addresses are reserved. 169 is self assigned, 224 is multicast and 255 is broadcast.

But since ARP is kind of a bridge between L2 and L3 I would only expect the cache to be populated with entries from the same network that the interface is configured on. So if the PC doing the searching is on 192.168.11.x I wouldn't expect the ARP table to be populated with entries from outside that range (apart from a few internal special addresses). Was your interface confinured on multiple networks?

Big Lar

If you can jopin the wifi network with your phone download this app and you can scan the network.
https://play.google.com/store/apps/details?id=com.overlook.android.fing&hl=en

TheChizler

Big Lar wrote: »

If you can jopin the wifi network with your phone download this app and you can scan the network.
https://play.google.com/store/apps/details?id=com.overlook.android.fing&hl=en

They did that in the OP! Problem is it's on a different network.

PeterTheEighth

TheChizler wrote: »

Download wireshark to a laptop, plug it directly into the ethernet port of the DVR, and look for any packets coming out of the DVR, particularly and ARP or DHCP frames which would contain its IP address.

+1
this is my preferred method. Works perfectly

ED E

TheChizler wrote: »

But since ARP is kind of a bridge between L2 and L3 I would only expect the cache to be populated with entries from the same network that the interface is configured on. So if the PC doing the searching is on 192.168.11.x I wouldn't expect the ARP table to be populated with entries from outside that range (apart from a few internal special addresses). Was your interface confinured on multiple networks?

Arp resolves switched networks, so it matches any device with a MAC in its CD. It matches IP to MAC, but doesnt care what the IP is, not its problem.

Seriously, Wireshark is a great tool but totally unnecessary here.

PeterTheEighth

arp -a is not going to work unless you have previously communicated with the device by IP address and have the MAC address cached. And usually if you have communicated with it you know already know the hostname/IP address.

Wireshark is simple, gives you all the layer 2 and layer 3 traffic, and importantly lets you isolate the device you are trying to work out the IP of.

UrbanFret

its a grundig GDV B2208A .


the router is this one, not sure what make it is.


I have downloaded a manual so I'll give it a read later.

UrbanFret

denismc wrote: »

I don't have a Grundig PVR but mine is hooked up to an pc monitor via a vga cable and I access the menu through this. I think mine has a 4 digit pin and the default is 1234 or 0000 so your model may have a similar setup. Bit of a long shot but maybe worth a try.

Yes I found a piece of paper in the cabinet with this on it .

dr.fuzzenstein

So it looks like there should be a monitor connected to the Grundig with a configuration menu and there should be Ethernet settings in there.

PeterTheEighth

Hey UrbanFret, can I confirm something about the GDV B2208A. Is it plugged into a screen of any kind that you can view the cameras on?

UrbanFret

Sorry for the delay in getting back. I did connect a monitor and a mouse to the dvr. I managed to access the menu and change the ip to something valid on the new router. However i can only access the cameras on the local network. Anyone able to guide me through the process of viewing the cameras from any location. I know it involves port forwarding or something . How do I access the router settings for the router pictured above (net1 internet provider)? the port I can view them on locally is 8080.

bonzodog2

Find the routers config page at the IP address of default gateway in results of ipconfig/all
you may need to google default user/pass for it
check out http://portforward.com/ for help after that if needed

PeterTheEighth

Port forwarding can be tricky to get working sometimes because every router has it's own implementation, and it's own interface to implement it. Some require both a firewall rule and a forwarding rule, some require just a forwarding rule. What type of Internet router do you have?

At least you can use one of the online port scanners to test it.
TCP Port Scan

davo2001

Not only will he need to do port forwarding but he will have to have a static WAN IP to access it remotely, either that or use some kind of dyndns service like dyn.com or noip.com

UrbanFret

PeterTheEighth wrote: »

Port forwarding can be tricky to get working sometimes because every router has it's own implementation, and it's own interface to implement it. Some require both a firewall rule and a forwarding rule, some require just a forwarding rule. What type of Internet router do you have?

At least you can use one of the online port scanners to test it.
TCP Port Scan

Ok thanks for the reply. Its a hap lite by mickrotik. ISP is NET1 I can't get logged into the bloody thing as Net1 must change the default router log in. I am so close it's infuriating. I have downloaded the winbox software as this is recommended. I keep getting invalid user name or password. I have asked the people to ring net1 tomorrow and find out what they changed it to.:(

UrbanFret

davo2001 wrote: »

Not only will he need to do port forwarding but he will have to have a static WAN IP to access it remotely, either that or use some kind of dyndns service like dyn.com or noip.com

Yes. thanks. I got logged into the dvr and have set a static ip address. I can access the cameras on my phone over lan but without port forwarding enabled on the router i can't access them remotely.

UrbanFret

I have logged into the router and gone to IP -> Firewall -> NAT ->Clicked the "+" to add a new NAT rule. Modified the "Chain" to "dstnat" the "Protocol" to "tcp", and "Dst. Port" to "8080". Clicked the "Action" tab, changed the "Action" value to "dst-nat", the "To Addresses" to "192.168.*.***" and the "To Ports" to "8080"clicked apply then ok rebooted router and still no joy. I've had enough at this stage to be honest, what could be the problem???