[Solved] Can't connect to VPN server AC66U

[bigguacamole]

I've been trying to set up a VPN so I can access my home network from the internet, but am having problems to connect any client to it.

I have PPTP VPN server turned on, set up a user/password and everything works good if I'm within the network. But if I connect from a external network I just won't be able to, which is odd because I swear could do it earlier this morning when I started the whole process.

After several attempts I'm just giving up on ddns and setting my public ip on the VPN client with no luck, but I have found a couple of things:

• I can't ping the ip UNLESS I go to Firewall and choose Yes to Respond Ping Request from WAN, which tells me I indeed have a public ip on my router.
• If I try to telnet it will work for a moment and if I send anything it will return "Connection reset by peer".

At this point I'm not sure if there's something going on with my router or if my ISP is blocking something, and I should either call them and ask for some config or workaround it somehow.

I am using latest Merlin firmware, dated from 2016-05-11, version 380.59.

Thanks in advance.

 

[bigguacamole]

Hi again, I got a couple of logs:

Here is the log for a successful VPN connection within the LAN:

May 15 11:04:00 dnsmasq-dhcp[246]: DHCPDISCOVER(br0) ec:88:92:xx:xx:xx
May 15 11:04:00 dnsmasq-dhcp[246]: DHCPOFFER(br0) 192.168.1.112 ec:88:92:xx:xx:xx
May 15 11:04:00 dnsmasq-dhcp[246]: DHCPREQUEST(br0) 192.168.1.112 ec:88:92:xx:xx:xx
May 15 11:04:00 dnsmasq-dhcp[246]: DHCPACK(br0) 192.168.1.112 ec:88:92:xx:xx:xx Nexus6
May 15 11:04:06 pptpd[589]: CTRL: Client 192.168.1.112 control connection started
May 15 11:04:06 pptpd[589]: CTRL: Starting call (launching pppd, opening GRE)
May 15 11:04:06 pptp[590]: Plugin pptp.so loaded.
May 15 11:04:06 pptp[590]: PPTP plugin version 0.8.5 compiled for pppd-2.4.7, linux-2.6.22.19
May 15 11:04:06 pptp[590]: pppd 2.4.7 started by poncho, uid 0
May 15 11:04:06 pptp[590]: Using interface ppp10
May 15 11:04:06 pptp[590]: Connect: ppp10 <--> pptp (192.168.1.112)
May 15 11:04:10 pptp[590]: MPPE 128-bit stateless compression enabled
May 15 11:04:13 pptp[590]: Cannot determine ethernet address for proxy ARP
May 15 11:04:13 pptp[590]: local  IP address 192.168.1.1
May 15 11:04:13 pptp[590]: remote IP address 192.168.10.2

And this is for the unsuccessful log on WAN:

May 15 11:06:24 pptpd[607]: CTRL: Client 187.210.xx.xx control connection started
May 15 11:06:25 pptpd[607]: CTRL: Starting call (launching pppd, opening GRE)
May 15 11:06:25 pptp[608]: Plugin pptp.so loaded.
May 15 11:06:25 pptp[608]: PPTP plugin version 0.8.5 compiled for pppd-2.4.7, linux-2.6.22.19
May 15 11:06:25 pptp[608]: pppd 2.4.7 started by poncho, uid 0
May 15 11:06:25 pptp[608]: Couldn't allocate PPP unit 10 as it is already in use
May 15 11:06:25 pptp[608]: Using interface ppp11
May 15 11:06:25 pptp[608]: Connect: ppp11 <--> pptp (187.210.xx.xx)
May 15 11:06:55 pptp[608]: LCP: timeout sending Config-Requests
May 15 11:06:55 pptp[608]: Connection terminated.
May 15 11:06:55 pptp[608]: Modem hangup
May 15 11:06:55 pptp[608]: Exit.
May 15 11:06:55 pptpd[607]: CTRL: Client pppd TERM sending
May 15 11:06:55 pptpd[607]: CTRL: Client pppd finish wait
May 15 11:06:55 pptpd[607]: CTRL: EOF or bad error reading ctrl packet length.
May 15 11:06:55 pptpd[607]: CTRL: couldn't read packet header (exit)
May 15 11:06:55 pptpd[607]: CTRL: Fatal error reading control message in disconnect sequence
May 15 11:06:55 pptpd[607]: CTRL: Client 187.210.xx.xx control connection finished

I loked around but I didn't find much, any ideas?

 

[bigguacamole]

So I've no idea what was going on, after several factory resets trough the GUI with no success I tried again with the reset button and it worked with no issues.