Hello,

I have a problem connecting to a VPN server (PPTP) that is running on the Archer AX23 v1.0 router, firmware: Archer AX23 (EU) _V1_211126.

I am trying to connect to the VPN server from the router Archer C6U v1.0, firmware: Archer C6U (RU) _V1_201230.

The Archer C6U gets a VPN IP address and the Archer AX23 shows that the connection is established,

but the Internet on the Archer C6U does not work. Logs:

####################################################################
#                  Archer AX23 System Log
# Time = 2022-01-19 11:47:24
# H-Ver = 1.0 ; S-Ver = 1.0.4 Build 20211126 Rel. 35285
####################################################################

2022-01-19 11:45:59 ppp[11291]: <6> 261066 ppp send LCP TermReq due to User request
2022-01-19 11:45:25 ppp[11291]: <6> 261091 ppp receive IPCP ACK
2022-01-19 11:45:25 ppp[11291]: <6> 261090 ppp send IPCP Req options(addr=12.0.0.11;)
2022-01-19 11:45:25 ppp[11291]: <6> 261094 ppp receive IPCP Reject options(comptype=0x002d0f01;)
2022-01-19 11:45:25 ppp[11291]: <6> 261090 ppp send IPCP Req options(addr=12.0.0.11;comptype=0x002d0f01;)
2022-01-19 11:45:25 ppp[11291]: <6> 261080 ppp send CHAP Success: <null>
2022-01-19 11:45:25 ppp[11291]: <6> 261079 ppp receive CHAP Response name=(hidden information)
2022-01-19 11:45:25 ppp[11291]: <6> 261076 ppp send CHAP Challenge name=pptp-server
2022-01-19 11:45:25 ppp[11291]: <6> 261064 ppp receive LCP ACK
2022-01-19 11:45:25 ppp[11291]: <6> 261061 ppp send LCP Request options(mru=1400;authtype=PPP_CHAP|type(0);magic=0xbda7ed33;)
2022-01-19 11:45:25 ppp[11291]: <6> 261063 ppp receive LCP Reject options(pcomp;accomp;)
2022-01-19 11:45:25 ppp[11291]: <6> 261060 ppp send LCP ACK
2022-01-19 11:45:25 ppp[11291]: <6> 261058 ppp receive LCP Request options(mru=1420;magic=0x23342d16;)
2022-01-19 11:45:25 ppp[11291]: <6> 261061 ppp send LCP Request options(mru=1400;authtype=PPP_CHAP|type(0);magic=0xbda7ed33;pcomp;accomp;)

####################################################################
#                   Archer C6U System Log
# Time = 2022-01-19 12:48:40
# H-Ver = 1.0.0 ; S-Ver = 1.0.4 Build 20201230 rel.52204
####################################################################

2022-01-19 12:45:25 remote-management[19895]: <6> 282505 Service stop
2022-01-19 12:45:25 nat[19634]: <6> 211501 Initialization succeeded
2022-01-19 12:45:25 ppp[19664]: <6> 261091 ppp receive IPCP ACK
2022-01-19 12:45:25 ppp[19664]: <6> 261090 ppp send IPCP Req options(addr=12.0.0.1;dns1=12.0.0.11;dns2=8.8.8.8;)
2022-01-19 12:45:25 ppp[19664]: <6> 261093 ppp receive IPCP NAK options(addr=12.0.0.1;dns1=12.0.0.11;dns2=8.8.8.8;)
2022-01-19 12:45:25 ppp[19664]: <6> 261090 ppp send IPCP Req options(addr=0.0.0.0;dns1=0.0.0.0;dns2=0.0.0.0;)
2022-01-19 12:45:25 ppp[19664]: <6> 261081 ppp receive CHAP Success: S=86TT877G51F8927S6876B1A39C07S134B427BBE3 M=Access granted
2022-01-19 12:45:25 ppp[19664]: <6> 261078 ppp send CHAP Response name=(hidden information)
2022-01-19 12:45:25 ppp[19664]: <6> 261077 ppp receive CHAP Challenge name=pptp-server
2022-01-19 12:45:25 ppp[19664]: <6> 261060 ppp send LCP ACK
2022-01-19 12:45:25 ppp[19664]: <6> 261058 ppp receive LCP Request options(mru=1400;authtype=PPP_CHAP|type(MS-CHAP2);magic=0xbda7ed33;)
2022-01-19 12:45:25 ppp[19664]: <6> 261064 ppp receive LCP ACK
2022-01-19 12:45:25 ppp[19664]: <6> 261058 ppp receive LCP Request options(mru=1400;authtype=PPP_CHAP|type(MS-CHAP2);magic=0xbda7ed33;)
2022-01-19 12:45:25 ppp[19664]: <6> 261061 ppp send LCP Request options(mru=1420;magic=0x23342d16;)
2022-01-19 12:45:24 ppp[19678]: <6> 261033 pptp receive Outgoing-Call-Reply peer-callid 11 callid 127 result 1 errcode 0
2022-01-19 12:45:24 ppp[19678]: <6> 261032 pptp send Outgoing-Call-Req callid 11 sernum 0
2022-01-19 12:45:23 ppp[19678]: <6> 261031 pptp receive Start-Control-Connection-Reply result 1 errcode 0 hostname local
2022-01-19 12:45:23 ppp[19678]: <6> 261030 pptp send Start-Control-Connection-Req to (hidden information)
2022-01-19 12:45:13 network[18851]: <6> 290100 Set WAN protocol to pptp, operation is write

Otherwise, if I establish a VPN connection from a Windows 7 PC, it all works. Logs:

####################################################################
#                  Archer AX23 System Log
# Time = 2022-01-19 11:47:24
# H-Ver = 1.0 ; S-Ver = 1.0.4 Build 20211126 Rel. 35285
####################################################################

2022-01-19 11:44:51 ppp[10536]: <6> 261067 ppp receive LCP TermReq
2022-01-19 11:44:29 ppp[10536]: <6> 261091 ppp receive IPCP ACK
2022-01-19 11:44:29 ppp[10536]: <6> 261090 ppp send IPCP Req options(addr=12.0.0.11;)
2022-01-19 11:44:29 ppp[10536]: <6> 261094 ppp receive IPCP Reject options(comptype=0x002d0f01;)
2022-01-19 11:44:29 ppp[10536]: <6> 261090 ppp send IPCP Req options(addr=12.0.0.11;comptype=0x002d0f01;)
2022-01-19 11:44:29 ppp[10536]: <6> 261080 ppp send CHAP Success: <null>
2022-01-19 11:44:29 ppp[10536]: <6> 261079 ppp receive CHAP Response name=(hidden information)
2022-01-19 11:44:29 ppp[10536]: <6> 261076 ppp send CHAP Challenge name=pptp-server
2022-01-19 11:44:29 ppp[10536]: <6> 261064 ppp receive LCP ACK
2022-01-19 11:44:29 ppp[10536]: <6> 261061 ppp send LCP Request options(mru=1400;authtype=PPP_CHAP|type(0);magic=0x7f32f9ff;pcomp;accomp;)
2022-01-19 11:44:26 ppp[10536]: <6> 261060 ppp send LCP ACK
2022-01-19 11:44:26 ppp[10536]: <6> 261058 ppp receive LCP Request options(mru=1400;magic=0x1c20a9a;pcomp;accomp;)
2022-01-19 11:44:26 ppp[10536]: <6> 261058 ppp receive LCP Request options(mru=1400;magic=0x1c20a9a;pcomp;accomp;)
2022-01-19 11:44:26 ppp[10536]: <6> 261061 ppp send LCP Request options(mru=1400;authtype=PPP_CHAP|type(0);magic=0x7f32f9ff;pcomp;accomp;)

The log shows the difference in these line:

2022-01-19 11:45:25 ppp[11291]: <6> 261063 ppp receive LCP Reject options(pcomp;accomp;)

Don't know what can it be?

Dioflash