Hi,
i am using TMG2010 with two NICs, one for internal and 2nd for External(Internet), the configuration for both NICs are as below the order of NICs are Internal and then External,
Configuration Internal Network: IP: 192.168.0.0 DNS: 192.168.0.1
External Network: IP: 73.67.87.x GW: 73.67.87.x
External Network Default Gateway defined DNS Servers defined Register this connection’s address in DNS – Disabled File and Print Sharing for Microsoft Networks – Disabled Client for Microsoft Networks – Disabled NetBIOS over TCP/IP – Disabled Show icon in notification area when connected - Enabled
Internal Network
Default Gateway not defined DNS Servers defined Register this connection’s address in DNS – Enabled File and Print Sharing for Microsoft Networks – Disabled Client for Microsoft Networks – Enabled NetBIOS over TCP/IP – Enabled Show icon in notification area when connected – Enabled
i am using internal DNS server like 192.168.0.1 and i use dns forwarder. i am using ISP DNS server ip in DNS forwarder tab.
My DNS server is working fine for internal and external name resolution, after some time internet browsing stop suddenly, some time its stop after 2 to 3 hour some time it after 7 to 8 hour. when internet browsing stp then i can ping to external site like google, cnn and yahoo etc. i can also tracert to external sites and my request complete, its working ok, but when i donslookup then it show request timeout for external sites, but dns working ok for internal site. i have dns installed on active directory. i did not have dns server on TMG2010. My tmg2010 is upto date with SP2 and rollup5 from Microsoft.
I got following error
Technical Information (for support personnel)
- Error Code 10060: Connection timeout
- Background: The gateway could not receive a timely response from the website you are trying to access. This might indicate that the network is congested, or that the website is experiencing technical difficulties.
- Date: 9/24/2014 3:30:18 PM [GMT]
- Server: abc.com
- Source: Firewall
Then i have to do following task for internet working.
TMG Managenment Console-->Networking--> Network rules-->NAT address section and i have to change my External ip address then browsing start and working fine for some time.
with these setting i have rum tmg2010 for 2 to 3 years its ok now it crated problem however i did not any change in rules or configuration, i have some publishing rules for exchange and websites which always working even when dns not working properly.
can anyone help me to sort-out this issue.
Thanks in advance.