Guild Wars 2

I have a 100mb/s ISP optice fiber, all ports opened and my download speed is about 600kb/s. it’s not peak time. Every other software that uses my connection is closed, only the GW2 launcher is running.

Is there something that I can do to increase the download speed?

GW2 uses a CDN to deliver patches, which is basically multiple servers all around the world. Generally, your default CDN server should be your best choice, but it could be overloaded or experiencing other problems.

To manually change your CDN server, you can either modify your hosts file or change your DNS server.

To change your DNS server:

https://developers.google.com/speed/public-dns/docs/using

To modify your hosts file:

Search your start menu for notepad, right click it and run as administrator. Open the file C:\Windows\System32\drivers\etc\hosts

At the end, add the following line and save it:

174.35.56.164 assetcdn.101.arenanetworks.com

Replace 174.35.56.164 with one of the various IPs for assetcdn.101.arenanetworks.com. Using a command prompt, you can look up its IP using, for example, Google’s DNS by entering the command:
nslookup assetcdn.101.arenanetworks.com 8.8.8.8