We block several outbound ports for network security.
You may request these blocks be removed by opening a support ticket.
TCP port 25 (SMTP)
TCP & UDP port 137
TCP & UDP port 138
TCP & UDP port 139
TCP & UDP port 445
TCP port 1688 (KMS, inbound only)
These ports are commonly abused for DDOS attacks. These blocks are permanent, and cannot be removed.
TCP & UDP port 17
TCP & UDP port 19
TCP & UDP port 1900
UDP port 53413
UDP port 11211
We also filter RFC1918 addresses on public NICs.
10.0.0.0 - 10.255.255.255 (10/8 prefix)
172.16.0.0 - 172.31.255.255 (172.16/12 prefix)
192.168.0.0 - 192.168.255.255 (192.168/16 prefix)
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