Network issues can be difficult to troubleshoot because they have so many causes, such as our ISP, your ISP, equipment, configurations, etc. If AppNexus is having a problem internally or with one of our ISPs, we will alert all customers with an email notification. Otherwise, a common source of the problem is the connection between a customer's ISP and Level3 or Global Crossing (our ISPs). These types of problems generally self heal as new routes propagate.
The best troubleshooting tool is a traceroute to see where traffic is getting stuck.
Use ICMP-based traceroute in one of these ways:
tracert" from a Windows host
traceroute -I" from a Linux host
traceroute -P icmp" from a BSD or Mac host
You can also issue "
telnet myip.fixr.net" to check what IP address your request is being sent from. This can diagnose firewall/proxy issues.
If a traceroute doesn't help you solve the problem, please send the following information to Support:
1) Description of the issue (e.g., latency, packet loss, slow access, no access)
2) Source IP of client server (queried as follows: "
3) Destination IP of unreachable server
4) Service attempted (e.g., tcp/udp, port, application like https, snmp, ssh)
5) ICMP-based traceroute from client to server
6) ICMP-based traceroute from server to client