Technical information

CPE

Manufacturer’s documentation of the CPE:

NOTE that:

  • terminology may differ, e.g. ‘CPE’ is referred to as ‘RG’.
  • some settings may have been protected by network management; these cannot be changed by the tenant.

The information below is intended for tenants knowledgeable in computer networking. 

DNS, router(s)

central router 145.97.192.1
dns.sshnet.nl 145.97.192.174
ssh-west.net.uu.nl 131.211.0.10
uu-router.Customer.surf.net 145.145.16.98
AE0.500.JNR01.Asd002A.surf.net 145.145.80.81
google-public-dns-a.google.com 8.8.8.8
 

A local problem may be detected by pinging the local router: 145.90.***.1

 

The *** number can be derived from the third digit of your own IP addess.
It is identical, or the even number which is 1 lower.

 

Example:

  your IP adres local router
3rd digit is even 145.90.80.6 145.90.80.1
3rd digit is odd 145.90.81.166 145.90.80.1
 

Your IP address may be found using e.g. http://whatismyip.org

 Email

SSHnet has a central mailserver which has to be used when sending email using SMTP. This has been configured in order to avoid vulnerabilities, that may arise from running your own SMTP server.

 

When using nothing but webmail (like gmail.com, hotmail.com, etc.), this does not apply and you may skip reading this section.

 

Settings of your email software

 

Configure in your email ‘client’ software (such as Eudora, Outlook, Thunderbird, Opera Mail, etc.):

  • outgoing mail server: smtp.sshnet.nl
  • port number: 25 (no encryption or using TLS) or 465 (using SSL)
 

E-mail processing by smtp.sshnet.nl:

  • check on virus/malware
  • check on executable attachments (like .exe .vbs .scr .bat .cmd .com .dll)
  • rate limiter on number of connects to the mailserver, number of recipients and size of the email
  • check on a valid sender address

E-mails failing these checks are not sent; you will receive a notification. 

DNS

In SSHnet the DNS port (port number 53) is inaccessible from outside. This has been done to mitigate vulnerabilities of any DNS servers running on equipment of tenants.