Dec 13

SIP registration change on Google Voice Gateway

I am setting the minimum accepted registration expiration on GVGW to 120 seconds as a trial. The gateway’s default minimum of 60 seconds had been in place since launch.

It is recommended that users set their minimum value to at least 120 seconds. UAs attempting to register with a shorter interval will get a SIP 423 “Interval too brief” response and are expected to send another registration that conforms to the server’s minimum.

This is standard SIP but not every UA implements the standard correctly. Also there could be some misconfigurations where users have set a maximum interval lower than 120 which would prevent them from registering.

A 60-second registration timer causes the client to refresh at 30 seconds, which is grossly excessive considering that the majority of devices doing this haven’t changed their IP addresses in weeks or longer. Even as a keep-alive mechanism, a 30 second refresh is unnecessary. UAs needing NAT keepalive should use the appropriate option and not abuse SIP REGISTER for that purpose.

Dec 11

Growing GVGW cluster

Two more proxies were added to the GVGW cluster. Setting strict ACLs is not recommended due to the nature of our cloud-based service. Nonetheless, here are the new IPs for your reference:

165.227.196.211

162.243.0.242

Dec 07

GVGW node added

159.203.186.242 has been added to the Google Voice Gateway proxy list.

$ dig @8.8.8.8 +short gvgw.simonics.com. a
162.243.107.101
162.243.1.217
162.243.210.200
159.203.186.242
198.199.84.66
159.203.110.178
45.55.163.124
159.203.184.149
104.236.102.59
Dec 05

GVGW node added

To handle recent growth, a new GVGW node has been added: 162.243.1.217.

If you are using strict firewall or ACL rules, be sure to update your configuration for this new proxy.

Nov 09

GVGW server addition

A seventh gateway proxy was recently added: 159.203.184.149. Here is the full list.

$ dig +short gvgw.simonics.com. a
162.243.210.200
198.199.84.66
159.203.110.178
104.236.102.59
159.203.184.149
162.243.107.101
45.55.163.124
Jun 11

GVGW node addition

A new node, 162.243.210.200, is being added to the Google Voice Gateway proxy list today. If you have a restrictive firewall configuration or specific ACLs, be sure to add the new node to your list.

Feb 09

GVGW node update

A new proxy node is being added to the cluster and will appear in the DNS SRV and round-robin A records shortly.

If you have firewall rules or ACLs restricting access to your SIP equipment, please add 162.243.107.101.

The rest of the list:

$ dig +short gvgw.simonics.com. a
45.55.163.124
198.199.84.66
104.236.102.59
Oct 15

New GVGW node added

A new proxy node has been added to the Google Voice Gateway (GVGW) cluster and is starting to appear in the A-record and SRV records. If you permitted specific IPs in your firewall or ACL, please note the addition:

198.199.84.66

The current list:

$ dig +short gvgw.simonics.com. a
45.55.163.124
198.199.84.66
104.236.102.5