With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
alPptpStatsTunnelPeerHostName
ALTIGA Pptp Statistics Tunnel Peer Host Name
1.3.6.1.4.1.3076.2.1.2.3.2.1.5
The peer's host name, as indicated by the peer in a Start-Control-Connection packet.
Back to ALTIGA-PPTP-STATS-MIB MIB page.
IPHost Network monitor allows you to monitor alPptpStatsTunnelPeerHostName on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.