I am have a strange issue with connection to a server and I just dont understand it!
A client has a managed server at 1&1, no access to logs
When connect to this server by FTP or SSH the connection will drop and then for a period I can not connect to the server by SSH, FTP or even HTTP yet I can ping the server and traceroute to it.
No one else has this issue and I have no problem with any other server.
From my end all I can find is that the server is rejecting my connection but according to 1&1 tech support there is nothing on the server that would black list an ipaddress.
I am using Suse 11.2 using Virgin Broadband, anyone else had this issue ?
Sounds like itās a fundamental networking issue, your session is interrupted only on one end and it sounds like the TCP/IP session has to timeout on the other end before you can establish another connection. Itās not a āblacklisting,ā it sounds like a faulty network connection.
Depending on how regular the problem is, you may find it difficult to troubleshoot, if I were in your place Iād start by
Mapping the connection using route trace.
Comparing the above with other āproblem freeā connections to determine if the same routers are traversed, particularly if the gateway to the 1&1 network is different.
Consider if thereās anyone who might be trying to hack your connection (you may need to ask 1&1 to set up special logging to compare with your known connection attempts).
Is the Server restricted to number of connections? If so, maybe someone else is connecting and kicking you off.
