[aka13]

Вот информация, которую просили сообщить:
Windows IP Configuration

Host Name . . . . . . . . . . . . : server
Primary Dns Suffix . . . . . . . : terno.net
Node Type . . . . . . . . . . . . : Unknown
IP Routing Enabled. . . . . . . . : Yes
WINS Proxy Enabled. . . . . . . . : Yes
DNS Suffix Search List. . . . . . : terno.net

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek RTL8102E Family PCI-E Fast Ethern
et NIC
Physical Address. . . . . . . . . : 00-19-66-77-9E-3B
DHCP Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 10.21.125.2
Subnet Mask . . . . . . . . . . . : 255.0.0.0
Default Gateway . . . . . . . . . : 10.21.125.1
DNS Servers . . . . . . . . . . . : 217.119.16.67
217.119.16.75

Ethernet adapter Local Area Connection 3:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : 3Com EtherLink XL 10/100 PCI For Complete
PC Management NIC (3C905C-TX)
Physical Address. . . . . . . . . : 00-03-99-55-50-41
DHCP Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 192.168.50.1
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . :
DNS Servers . . . . . . . . . . . : 217.119.16.67
217.119.16.75

ДНС тесты (в "мониторинге" оснастки) проходят оба успешно.
Проблему немного локализовал до сервера: если активирован "внешний" интерфейс, то доступ к интернету (локально) есть:

C:\Documents and Settings\Administrator>ping 10.21.125.1

Pinging 10.21.125.1 with 32 bytes of data:

Reply from 10.21.125.1: bytes=32 time=5ms TTL=64
Reply from 10.21.125.1: bytes=32 time=5ms TTL=64

Ping statistics for 10.21.125.1:
Packets: Sent = 2, Received = 2, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 5ms, Maximum = 5ms, Average = 5ms
Control-C
^C

C:\Documents and Settings\Administrator>ping 217.119.16.67

Pinging 217.119.16.67 with 32 bytes of data:

Reply from 217.119.16.67: bytes=32 time=7ms TTL=63
Reply from 217.119.16.67: bytes=32 time=5ms TTL=63
Reply from 217.119.16.67: bytes=32 time=7ms TTL=63
Reply from 217.119.16.67: bytes=32 time=6ms TTL=63

Ping statistics for 217.119.16.67:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 5ms, Maximum = 7ms, Average = 6ms

Если запустить "внутренний" интерфейс, то инет пропадает:

C:\Documents and Settings\Administrator>ping 192.168.50.1

Pinging 192.168.50.1 with 32 bytes of data:

Reply from 192.168.50.1: bytes=32 time<1ms TTL=128
Reply from 192.168.50.1: bytes=32 time<1ms TTL=128
Reply from 192.168.50.1: bytes=32 time<1ms TTL=128

Ping statistics for 192.168.50.1:
Packets: Sent = 3, Received = 3, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms
Control-C
^C
C:\Documents and Settings\Administrator>ping 10.21.125.2

Pinging 10.21.125.2 with 32 bytes of data:

Reply from 10.21.125.2: bytes=32 time<1ms TTL=128
Reply from 10.21.125.2: bytes=32 time<1ms TTL=128
Reply from 10.21.125.2: bytes=32 time<1ms TTL=128

Ping statistics for 10.21.125.2:
Packets: Sent = 3, Received = 3, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms
Control-C
^C
C:\Documents and Settings\Administrator>ping 217.119.16.67

Pinging 217.119.16.67 with 32 bytes of data:

Request timed out.

Ping statistics for 217.119.16.67:
Packets: Sent = 1, Received = 0, Lost = 1 (100% loss),
Control-C
^C

Что посоветуете теперь?