EduMan Posted May 25, 2010 Posted May 25, 2010 We have recently upgraded our IP Subnet so we have the following range; 10.35.68.1 - 10.34.70.254 We basically have done this so all of our CCTV is on the range 10.34.70.x Our main Server is IP 10.34.68.11 Our CCTV Server is IP 10.34.70.2 We can get our server to ping out cctv server but my office computer or any computer to that fact cannot ping it or gain access to it. My computer information as follows; Ethernet adapter Admin Connection: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Realtek RTL8168C(P)/8111C(P) Family PCI-E Gigabit Ethernet NIC (NDIS 6.20) Physical Address. . . . . . . . . : 00-24-1D-D5-9D-98 DHCP Enabled. . . . . . . . . . . : No Autoconfiguration Enabled . . . . : Yes Link-local IPv6 Address . . . . . : fe80::ddcb:ab11:30dd:48d4%11(Preferred) IPv4 Address. . . . . . . . . . . : 10.34.68.145(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.0.0 Default Gateway . . . . . . . . . : fe80::3045:e6e7:ba12:612c%11 10.34.68.1 DHCPv6 IAID . . . . . . . . . . . : 234890269 DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-13-75-AE-B6-00-24-1D-D5-9D-98 DNS Servers . . . . . . . . . . . : 10.34.68.11 NetBIOS over Tcpip. . . . . . . . : Enabled Does anyone have any ideas at all? Im confuzzled..
Hightower Posted May 25, 2010 Posted May 25, 2010 What's the subnet for the CCTV system (may sound like a silly question but just to double check)? Can you ping the server from your PC? Have you tried temporarily disabling the firewall on your PC and pinging the CCTV system?
EduMan Posted May 25, 2010 Author Posted May 25, 2010 This is the ipconfig for CCTVSERVER; Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Broadcom BCM5708C NetXtreme II GigE (NDIS VBD Client) Physical Address. . . . . . . . . : 00-1C-23-BA-B8-1C DHCP Enabled. . . . . . . . . . . : No IP Address. . . . . . . . . . . . : 10.34.70.2 Subnet Mask . . . . . . . . . . . : 255.255.0.0 Default Gateway . . . . . . . . . : 10.34.68.1 DNS Servers . . . . . . . . . . . : 10.34.68.11 Yeah ive tried the firewall issue. Ive tried on XP, Windows 7. I can remote in to CCTVSERVER through SERVER though.
powdarrmonkey Posted May 25, 2010 Posted May 25, 2010 Clear the arp tables on both machines and intermediate switchgear. Failing that, it smells like something is doing some layer 3 filtering (do you have ACLs on any switches?).
EduMan Posted May 25, 2010 Author Posted May 25, 2010 Could it be an issue with the wrong Subnet Mask for the ranges?
Hightower Posted May 25, 2010 Posted May 25, 2010 You're subnet seems fine to me. 255.255.0.0 means your network is 10.34.0.0 - which means 10.34.1.1 can talk to 10.34.90.2 if you wanted to.
36Degrees Posted May 25, 2010 Posted May 25, 2010 lol! What does it need to be? 22 bits for 10.34.68.1 - 10.34.71.254 so SNM of 255.255.252.0
36Degrees Posted May 25, 2010 Posted May 25, 2010 You're subnet seems fine to me. 255.255.0.0 means your network is 10.34.0.0 - which means 10.34.1.1 can talk to 10.34.90.2 if you wanted to. LOL didn't notice the current SNM! So yes, that should be fine as Hightower stated.
Hightower Posted May 25, 2010 Posted May 25, 2010 Does your CCTV stuff have a list of 'allowed' IP addresses? It may be, for security reasons, it only allows certain IPs to connect to it. Take a look in the management software and see if there is any place you can add the IP for your computer.
EduMan Posted May 25, 2010 Author Posted May 25, 2010 The server allowed me to connect to it when it has an IP of 10.34.68.180. But I wanted all CCTV to be in the range of 10.34.70.x as we have a lot of cameras now. Nothing has been changed on it at all. Its really odd.
Hightower Posted May 25, 2010 Posted May 25, 2010 How are you connecting? Is it web based? If so, are you using IP or a name (like CCTVCam1) to try and connect?
EduMan Posted May 25, 2010 Author Posted May 25, 2010 (edited) RDP, I normally use the IP but neither the server name (cctvserver) or 10.34.70.2 works But i cant even ping it; Pinging 10.34.70.2 with 32 bytes of data: Request timed out. Request timed out. Request timed out. Request timed out. Ping statistics for 10.34.70.2: Packets: Sent = 4, Received = 0, Lost = 4 (100% loss), Edited May 25, 2010 by EduMan
EduMan Posted May 25, 2010 Author Posted May 25, 2010 Another strange thing just happened. I tried to ping it through the server name (which didnt work previously) Pinging cctvserver [10.34.70.11] with 32 bytes of data: Reply from 10.34.70.11: bytes=32 time<1ms TTL=128 Reply from 10.34.70.11: bytes=32 time<1ms TTL=128 Reply from 10.34.70.11: bytes=32 time<1ms TTL=128 Reply from 10.34.70.11: bytes=32 time<1ms TTL=128 Ping statistics for 10.34.70.11: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 0ms, Maximum = 0ms, Average = 0ms As you can see it worked.. I then tried RDP, it worked.... Literally 2mins later.. i now cant RDP and... Pinging cctvserver [10.34.70.11] with 32 bytes of data: Request timed out. Request timed out. Request timed out. Request timed out. Ping statistics for 10.34.70.11: Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
webman Posted May 25, 2010 Posted May 25, 2010 Are there any weird-looking events relating to network connectivity on the server logs? Is there any diagnostic information on the switch for that port which you can access?
Hightower Posted May 25, 2010 Posted May 25, 2010 I thought your CCTV servers IP was 10.34.70.2, yet when you try and ping the server name it tries to ping 10.34.70.11 - this suggests to me a problem with your DNS. Can you flush/register your DNS again on your workstation? ipconfig /flushdns and ipconfig /registerdns
EduMan Posted May 25, 2010 Author Posted May 25, 2010 Ok tried that.. I get on the ping an instant success then.. "Timed out" 10.34.70.2 with 32 bytes of data: Reply from 10.34.70.2: bytes=32 time<1ms TTL=128 Request timed out.
featured_spectre Posted May 25, 2010 Posted May 25, 2010 perhaps there is an intermittent fault in the cabling? is it running hot (sounds dumb but can happen). Any interference from any electrical equipment anywhere?
EduMan Posted May 25, 2010 Author Posted May 25, 2010 I will change to the other NIC see if that fixes the issues? Tom
Hightower Posted May 25, 2010 Posted May 25, 2010 Are you going through the same switching equipment as the server (the server that the connection is successful on?)
featured_spectre Posted May 25, 2010 Posted May 25, 2010 do a tracert command to the IP. it may reveal where on the hop it is failing, also if you do ARP -a from your machine, can you see the server IP there?
powdarrmonkey Posted May 25, 2010 Posted May 25, 2010 do a tracert command to the IP. it may reveal where on the hop it is failing, also if you do ARP -a from your machine, can you see the server IP there? There aren't any hops, the two addresses are within the same broadcast domain.
Hightower Posted May 25, 2010 Posted May 25, 2010 (edited) Scratch that.... Edited May 25, 2010 by Hightower Being an idiot!
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