| Port: |
Common Use: |
|
| TCP 25 |
SMTP
CSInet blocks SMTP access to curb the spread of Unsolicited Commercial Email (spam).
CSInet customers will always have appropriate access to CSInet's email servers.
CSInet permits exceptions for business class customers requesting SMTP access.
Please contact CSInet Technical support if you suspect this might be interfering with your business commnications. |
|
TCP 135
UDP 135 |
MS RPC protocol
"Blaster" virus
(MS Windows "peer" networking) |
|
TCP 137
UDP 137 |
NetBIOS name service
(MS Windows "peer" networking) |
|
TCP 138
UDP 138 |
NetBIOS Datagram service
(MS Windows "peer" networking) |
|
TCP 139
UDP 139 |
NetBIOS Session
(MS Windows "peer" networking) |
|
| TCP 445 |
"Sasser" worm propagation |
|
| UDP 1026 |
Windows Messenger (Messenger Pop-Up Spam) |
| UDP 1027 |
Windows Messenger (Messenger Pop-Up Spam) |
|
ICMP Echo
"Ping" |
CSInet blocks selected ICMP traffic to curb "ping flood attacks". |
|
