I don't know too much about networking and I'm hoping someone can point me in the right direction. I'm not sure how to go about solving my problem...
When I'm connected to my company LAN, I'm able to SSH into my server (CentOS) at home without a problem. However, when I'm connected to my company's VPN, I get a "Network error: Connection refused" error in PuTTY when trying to connect. The PuTTY log tells me the exact same thing and doesn't offer any other information (even when logging raw data). When I'm on the VPN and try to ping my server, it replies so it seems that only communication over the SSH port (22) is failing.
If this is an issue with my company firewall when I'm on the VPN, how would I be able to tell? If it's an issue with my server firewall, how would I be able to tell? Any advice is much appreciated. Thanks!
Edit:
I used nmap from the company LAN and VPN just to see what would happen. Here are the results:
From company LAN to server at home:
C:\Users\kal>nmap -p 22 {domain.name}
Starting Nmap 6.25 ( http://nmap.org ) at 2013-03-15 14:04 Eastern Daylight Time
Nmap scan report for {domain.name} ({ip.address})
Host is up (0.066s latency).
rDNS record for {ip.address}: pool-{ip.address}.fios.verizon.net
PORT STATE SERVICE
22/tcp open sshNmap done: 1 IP address (1 host up) scanned in 6.11 seconds
From company VPN to server at home:
C:\Users\kal>nmap -p 22 {domain.name}
Starting Nmap 6.25 ( http://nmap.org ) at 2013-03-15 14:06 Eastern Daylight Time
Note: Host seems down. If it is really up, but blocking our ping probes, try -Pn
Nmap done: 1 IP address (0 hosts up) scanned in 3.84 seconds