Encap.txt
An encap.txt file lists AMPRNet gateways, in a format like this:
# This is a comment route addprivate 44.10.0.100/32 encap 136.115.52.224 route addprivate 44.100.129.0/24 encap 176.140.10.22
Originally formatted for JNOS systems, it is often parsed with a "munge script" to update Linux system routing tables.
Portal
To get an encap.txt file that lists all current gateways, request all routes from the API and convert the response from JSON to text. For example (using API version 2):
curl -s -H "Authorization: Bearer $APItoken" -H "Accept: application/json" https://portal.ampr.org/api/v2/encap/routes | jq -r '.encap[] | select(.encapType == "IPIP") | "route addprivate \(.network)/\(.cidr) encap \(.gatewayIP)"'
HTTP
Previously, a complete encap.txt file was available from the portal as a web page. This is no longer supported.