I am using Cisco RV215W VPN Router with the latest Firmware (220.127.116.11). The router functions are OK, even the inbound PPTP client connection is quick. However, the problem comes up after the VPN connection is made and http console access to the networked NAS: the communication becomes very slow and even the VPN connection fails! The RV215W log shows the following:
30 2015/12/25 4:10:02 PM warning pppd: Warning - secret file /tmp/ppp/pap-secrets has world and/or group access 31 2015/12/25 4:08:58 PM err pptpd: CTRL: PTY read or GRE write failed (pty,gre)=(15,16) 32 2015/12/25 4:08:58 PM err pptpd: GRE: read(fd=15,buffer=451c4c,len=8196) from PTY failed: status = -1 error = Input/output error, usually caused by unexpected termination of pppd, check option syntax and pppd logs 33 2015/12/25 4:08:55 PM err pppd: MPPE disabled 34 2015/12/25 4:04:55 PM warning pppd: Warning - secret file /tmp/ppp/chap-secrets has world and/or group access 35 2015/12/25 4:04:55 PM err pptpd: GRE: Bad checksum from pppd.
(There are no communication issues when connecting to NAS http console on LAN.)
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