Eastern Oregon Net, Inc.
The Internet Done Right

A: Due to increases in worm, virus and other security intrusions EONI has implemented port blocking of specific network ports.

Customers who have network applications that use these ports should use a virtual private network (VPN) or other security system to allow safe use of these ports.

In addition these ports are blocked so that customers infected with worms or viruses are not as likely to spread these to others on the Internet.

The ports blocked by EONI should not be considered as a firewall. Customers are encouraged to carefully select a comprehensive security solution to protect their systems.
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Blocked ports outbound (on the way to the Internet from EONI customers)

TCP and UDP ports:
7
25 (see below)
135
136
137
138
139
445
1433
1434
4444
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Blocked ports inbound (on the way to EONI customers from the Internet)

TCP and UDP ports:
7
69
135
136
137
138
139
445
4444

Customers are strongly encouraged to use a firewall to protect their systems from the Internet. The ports listed above should not be considered a complete security solution for anyone.


Are you receiving email but not able to send email? Please read on.

Typically email software uses a POP3 server to receive email and a SMTP server to send email.

SMTP normally uses TCP port 25.

Outgoing connections on TCP port 25 are blocked by many Internet Service Providers including EONI. If you need to send email from the EONI network please consider using one of these options:

1. Find out if you can use smtp.eoni.com as your outgoing SMTP server. If you are using an email service not provided by EONI then you may need to contact the email help desk of your other provider to confirm that using the smtp.eoni.com as your outgoing email server will not cause email policy violations. In some cases the use of an alternate SMTP server may cause the email to appear to be coming from a forged or otherwise invalid source.

2. Does your other email service provider have an alternate port (something other than 25) that you can use to contact your SMTP server? Most email server providers accept outgoing email on port 25, and may also have other port numbers available as well to address the common policy of blocked port 25. Contact your email service provider to see if they offer an alternate SMTP server port number you can use. If they do you will usually change 25 to the port number your email service provider tells you to use in the advanced settings of your email server account settings.

3. If you have your own email server (such as Microsoft Exchange), see if your email server supports the use of a "smart host" option. Smart host usually means that when your email server needs to send an outgoing email the server will deliver the email to the smart host rather than looking up and delivering directly to the destination mail server. By using smtp.eoni.com as the smart host you can deliver the email to EONI's outgoing email server.

4. See if your non-EONI mail server provider offers a VPN, tunneling protocol, or other way to make a connection to the alternate outgoing email server you need to use.

5. If you have exhausted all resources above, you can order a static IP address from EONI (single static IP address is $7.50 per month with a $15 setup charge) and we can make an exception in our port 25 blockage policy for your account. We hope that one of the above options will work to get your outgoing email sent without having to resort to getting a static IP address. The static IP address allows us to identify your SMTP traffic on a consistent basis allowing us to make the exception.