ng_pptpgre(4) on FreeBSD
The text ab5312f69f42, as FreeBSD 4.10-RELEASE, FreeBSD 4.9-RELEASE, FreeBSD 4.8-RELEASE, FreeBSD 4.7-RELEASE, FreeBSD 4.6.2-RELEASE, FreeBSD 4.6-RELEASE shipped it.
PPTP GRE protocol netgraph node type
The text ab5312f69f42, as FreeBSD 4.10-RELEASE, FreeBSD 4.9-RELEASE, FreeBSD 4.8-RELEASE, FreeBSD 4.7-RELEASE, FreeBSD 4.6.2-RELEASE, FreeBSD 4.6-RELEASE shipped it.
PPTP GRE protocol netgraph node type