Misc. Network and Systems FAQ for ZipDial

Last update: 2/28/2003
Ths FAQ provides several bits of information about ZipDial network features, as well as miscellaneous system questions that may not have to do with ZipDial, but are common enough questions to our technical groups that we felt it useful to provide answers here.

Network and Systems FAQ Index

  1. What IP blocks must I allow through my mail (or other) filters?
  2. What is the v.90 status of your network?
  3. I notice that when I do a traceroute to you, it goes through MAE-EAST (or other heavily loaded peering point). What can I do to eliminate this delay?
  4. I'm having trouble figuring out how to make Sendmail 8.9.x relay mail. Where can I get more information about mail relaying?
  1. What IP blocks must I allow through my mail (or other) filters?

    The following IP address blocks are provided as a convenience to our customers. Please be aware that these blocks include addresses that are allocated to third parties. Ziplink has implemented strong anti-spam policies; however, we cannot be held accountable for the actions of these third parties or their customers.

    The current IP address blocks in use as of February 28, 2003 are: 

    206.15.128.1 - 206.15.143.254
209.206.0.1 - 209.206.127.254
216.8.0.1 - 216.8.63.254
208.196.96.1 - 208.196.127.254
199.232.240.1 - 199.232.254.254
205.208.0.1 - 205.208.255.254
65.160.176.1 - 65.160.191.254
63.175.32.1 - 63.175.47.254
208.23.200.1 - 208.23.207.254
204.248.128.1 - 204.248.143.254
64.20.176.1 - 64.20.191.254
66.81.0.1 - 66.81.127.254
66.81.128.1 - 66.81.191.254
66.81.192.1 - 66.81.223.254
199.232.10.1 - 199.232.12.254

    The IP blocks expressed as # bits: 

    199.232.240.0/20
206.15.128.0/18
208.196.96.0/19
209.206.0.0/17
216.8.0.0/18
205.208.0.0/16
65.160.176.0/20
63.175.32.0/20
208.23.200.0/21
204.248.128.0/20 
64.20.176.0/20
66.81.0.0/17
66.81.128.0/18
66.81.192.0/19
199.232.10.0/23
199.232.12.0/24

    The IP blocks expressed as netmasks: 

    199.232.240.0 netmask 255.255.240.0
206.15.128.0 netmask 255.255.192.0
208.196.96.0 netmask 255.255.224.0
209.206.0.0 netmask 255.255.128.0
216.8.0.0 netmask 255.255.192.0
205.208.0.0 netmask 255.255.0.0
65.160.176.0 netmask 255.255.240.0
63.175.32.0 netmask 255.255.240.0
208.23.200.0 netmask 255.255.248.0
204.248.128.0 netmask 255.255.240.0
64.20.176.0 netmask 255.255.240.0
66.81.0.0 netmask 255.255.128.0
66.81.128.0 netmask 255.255.192.0
66.81.192.0 netmask 255.255.224.0
199.232.10.0 netmask 255.255.254.0
199.232.12.0 netmask 255.255.255.0


  2. What is the v.90 status of your network?

    As of August 1999, all ZipLink access numbers available for ZipDial support the V.90 56K modem protocol.


  3. I notice that when I do a traceroute to you, it goes through MAE-EAST (or other heavily loaded peering point). What can I do to eliminate this delay?

    To avoid this latency, your best option is put in dedicated frame-relay or DSL connection (that doesn't go through the overloaded peering point) that can handle a static IP address.


  4. I'm having trouble figuring out how to make Sendmail 8.9.x relay mail. Where can I get more information about mail relaying?

    As of Sendmail ver 8.9, the anti-spam behavior of Sendmail has changed. Here is a Web page which talks about mail relaying under Sendmail 8.9.x.