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I did eventually resolve this issue with making most of the changes I stated earlier in the posts, it was not easy and all issues are caused by DNS lookups. So, I removed netbios from my LAN completely, set up DNS server on my server and configured all workstations to look at my dns server for...

After my last post, I found some things out.. First off, make sure your timeout on the isdn router is set to say 360 seconds.. the default could be set to zero, next make sure you have your netbios filters in place for ports 135,137,139 and for w2k port 445 in your router. Then if you have WINS...

Thanks Peter, I will go thru your suggested processes and let u know the results. Thanks for the reply, much appreciated Marco

I have an NT5 server running MDaemon,Mailscan,Norton AV 2001, no DNS server configured, no DNS IP's in network config, yet still my server makes DNS(53) calls to my router and this makes a dial out to my ISP. I have seen many posts on this subject here but hope that by giving as much detail as...

I am having the same problem as you, I have stopped DNS services, filtered TCP/UDP 137/138/139/445 in the ISDN router, took out the DNS IP addresses of my ISP in the network configuration but still every 2 minutes or so, the server makes a DNS(53) call and the dial up starts again. I have traced...

Thanks everybody for your help and advice, I have figured it out.. one of the support guys installed Zone Alarm on the server and uninstalled a few days later, however what he did not say was that the un-install was not very successful and it was this that was stopping the ICMP traffic from...

HI can anyone help, I'm a little stuck. We have an NT4 LAN running TCP/IP and NETBIOS, each win98/w2k client can see the server and logon, however when trying to ping the server we get request timed out. The same happens from the server, we cannot ping any of the workstations. No firewall is in...