QUESTION: Remote Connections Timing Out to SSH/HTTP in Parallel from Multiple Locations, but NOT PING, why?
ISSUE: Have a web server that has remote connections timing out around 50% of the time in parallel for ssh/http connections, but NOT ping. The downtime/uptime is irregular and are in durations of 5-20 minute periods. I've run checks through two distributed monitoring services, and the logs validate what I'm seeing locally. Issue has been going on for 4-5 days, 24/7.
- * What are test I should run from the server on resources?
- * What are test I should run to log outbound connections from the server?
- * What are test I should run remotely?
- * What are keywords or phrases I should Google?
- * What are other questions I should ask?
- * What additional information should I provide?
- * I have remote ADMIN access to the server, but not physical access.
- * Linux-CentOS-5.X, Apache-2.X
- * Unknown Virtual Machine, but other systems on the same network are not having remote connection issues
- * Network information unknown, but other systems on the same network are not having remote connection issues
Thanks in advance!!!
RECENT UPDATES (1): "Does your server still respond to ping during these outages?" @Greg - Yes, ping IS working... :-) ...but ssh/http are down in parallel during these outages. Also, all test are done via a static IP. IP address was owned within an IP block for years, but just assigned to the server.
RECENT UPDATES (2): PINGs from me appear to keep the ssh/http connection down. Doing an automated set of 10x PINGs every 5-minutes from a distributed network of computers. Leaving the PINGs on for the next 10-hours to see if ssh/http stay down; which would be a new pattern.
RECENT UPDATES (3): So, far as SUDO user I'm unable to view "/var/log/messages" or Apache logs. No other logs were attempted to be viewed.