I recently inherited responsibility for a SBS2003 machine and over the past few weeks I've witnessed a bunch of difficult-to-diagnose connectivity issues, both internet and intranet related. I don't know where to start to try to diagnose the issues. I wonder if all the issues are related to the same problem. Here are the specific problems I've witnessed:
1. Intranet clients can't reliably use apps which require access to databases on the Server. (Quickbooks gives "Connection lost" errors)
2. Backing up of large files (40-60MB) to Jungledisk fails and gives errors such as this:
"HTTP send disconnected: SSL_write() error: error:140943FC:SSL routines:SSL3_READ_BYTES:sslv3 alert bad record mac "
Jungledisk support says this is a "general connection failure".
3. Windows Remote Desktop sessions over the intranet disconnect within a minute, especially when something happens with a lot of screen movement (traffic).
4. Logmein Remote sessions over the internet disconnect within a few seconds. Sometimes sessions will last as long as 30 seconds but no longer.
Some info on the server and network:
A. There is no software antivirus/firewall affecting local traffic to my knowledge.
B. The server has two NICs. Both are connected to a TP-LINK Dual-wan router. A pair of T1s are bonded to the first NIC, DSL the second NIC. The second NIC has been disabled in Windows.
C. There is a cisco 1700 series which connects the dual T1s to the TP-LINK.
D. The intranet clients do not have connectivity problems to each other -- all issues are specific to this server.
I can't help but wonder if all of these connectivity problems are related to each other. Any suggestions as to where I should start in troubleshooting this? Thank you.