asked on

SBS 2008 Server Can't Connect to Internet via IP or Name

I have a very strange problem and hope someone has seen this before. We have a SBS 2008 server running on citrix xen server. We had shut power down last week because of Hurricane Issac. After turning server back on, we are having random internet outages from the system. For example, I can't resolve google.com nor can I ping any routable ip address on the internet, 8.8.8.8 . I've verified router/firewall, all client computers can route out if i use the isp dns as a secondary. What is really strange is that during random intervals during the day, it works for a few minutes then drops out. In my dns server on the sbs, my forward addresses will not resolve as well. I have spent 2 days trying to resolve this and have had no luck. I've replace firewall and switch as well. Not sure if there is something within sbs that would be causing this. I'm not an sbs expert. I have ran the newtwork config wizard, etc, etc. This is also my exchange server and because of this issue, no mail is getting routed to the server. Any ideas?

Thanks in advance..

SOLUTION

databoks

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ryanropp

ASKER

1. yes
2. static
3. yes

databoks

What happens when you add the secondary DNS server on the Ethernet NIC?

Have you used Wireshark before?

ryanropp

ASKER

still can't ping by ip or name with my isp's dns as secondary. I can understand not being able to by name because of dns, but can't for the life of me figure out why not by ip.

I've never used wireshark before.

SOLUTION

Member_2_4984608

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ryanropp

ASKER

I went ahead and removed and reinstalled the citrix virtual adapter to see if it helped and it did not. See below:

netstat -rn:

12 ...12 74 67 59 62 34 ...... Citrix XenServer PV Ethernet Adapter
1 ........................... Software Loopback Interface 1
13 ...00 00 00 00 00 00 00 e0 isatap.{43BBE123-542C-46D9-B0AD-EFE646488910
10 ...02 00 54 55 4e 01 ...... Teredo Tunneling Pseudo-Interface
===========================================================================

IPv4 Route Table
===========================================================================
Active Routes:
Network Destination Netmask Gateway Interface Metric
0.0.0.0 0.0.0.0 192.168.1.1 192.168.1.225 261
127.0.0.0 255.0.0.0 On-link 127.0.0.1 306
127.0.0.1 255.255.255.255 On-link 127.0.0.1 306
127.255.255.255 255.255.255.255 On-link 127.0.0.1 306
192.168.1.0 255.255.255.0 On-link 192.168.1.225 261
192.168.1.225 255.255.255.255 On-link 192.168.1.225 261
192.168.1.255 255.255.255.255 On-link 192.168.1.225 261
224.0.0.0 240.0.0.0 On-link 127.0.0.1 306
224.0.0.0 240.0.0.0 On-link 192.168.1.225 261
255.255.255.255 255.255.255.255 On-link 127.0.0.1 306
255.255.255.255 255.255.255.255 On-link 192.168.1.225 261
===========================================================================
Persistent Routes:
Network Address Netmask Gateway Address Metric
0.0.0.0 0.0.0.0 192.168.1.1 5
0.0.0.0 0.0.0.0 192.168.1.1 Default
===========================================================================

IPv6 Route Table
===========================================================================
Active Routes:
If Metric Network Destination Gateway
1 306 ::1/128 On-link
12 261 fe80::/64 On-link
12 261 fe80::298e:15aa:e000:921f/128
On-link
12 261 fe80::b61e:982b:91ab:7f68/128
On-link
1 306 ff00::/8 On-link
12 261 ff00::/8 On-link
===========================================================================
Persistent Routes:
None

Ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : DTL-SBS01
Primary Dns Suffix . . . . . . . : datatel.local
Node Type . . . . . . . . . . . . : Broadcast
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : datatel.local

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Citrix XenServer PV Ethernet Adapter
Physical Address. . . . . . . . . : 12-74-67-59-62-34
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::298e:15aa:e000:921f%12(Preferred)
Link-local IPv6 Address . . . . . : fe80::b61e:982b:91ab:7f68%12(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.225(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.1.1
DHCPv6 IAID . . . . . . . . . . . : 252867687
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-12-EC-91-20-12-74-67-59-62-

DNS Servers . . . . . . . . . . . : 192.168.1.225
NetBIOS over Tcpip. . . . . . . . : Enabled

Tunnel adapter Local Area Connection* 8:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : isatap.{43BBE123-542C-46D9-B0AD-EFE6464
910}
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Local Area Connection* 9:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : 02-00-54-55-4E-01
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

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ryanropp

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Rob Williams

ryanropp

ASKER

Figured out it was a device conflict.