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PPTP mschapv2 no response

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Using NetworkManager PPTP VPN plugin I am trying to connect to VPN. Still get timeouts, logs:

July 24 00:26:50 abraham NetworkManager[5654]: Plugin /usr/lib/pppd/2.4.9/nm-pptp-pppd-plugin.so loaded.
July 24 00:26:50 abraham pppd[5654]: pppd 2.4.9 started by root, uid 0
July 24 00:26:50 abraham pppd[5654]: Using interface ppp0
July 24 00:26:50 abraham NetworkManager[5654]: Using interface ppp0
July 24 00:26:50 abraham pppd[5654]: Connect: ppp0 <--> /dev/pts/1
July 24 00:26:50 abraham NetworkManager[5654]: Connect: ppp0 <--> /dev/pts/1
July 24 00:26:50 abraham NetworkManager[497]: <info>  [1627079210.0957] manager: (ppp0): new Ppp device (/org/freedesktop/NetworkManager/Devices/14)
July 24 00:26:50 abraham pptp[5657]: nm-pptp-service-5640 log[main:pptp.c:353]: The synchronous pptp option is NOT activated
July 24 00:27:21 abraham pppd[5654]: LCP: timeout sending Config-Requests
July 24 00:27:21 abraham NetworkManager[5654]: LCP: timeout sending Config-Requests
July 24 00:27:21 abraham NetworkManager[5654]: Connection terminated.
July 24 00:27:21 abraham pppd[5654]: Connection terminated.
July 24 00:27:21 abraham NetworkManager[497]: <warn>  [1627079241.1294] vpn-connection[0x55d50fe6c360,80e2f0de-fbd1-4735-8cc4-156bf8b5ae34,"vpn pptp",0]: VPN plugin: failed: connect-failed (1)
July 24 00:27:21 abraham NetworkManager[497]: <info>  [1627079241.1295] vpn-connection[0x55d50fe6c360,80e2f0de-fbd1-4735-8cc4-156bf8b5ae34,"vpn pptp",0]: VPN plugin: state changed: stopping (5)
July 24 00:27:21 abraham NetworkManager[497]: <info>  [1627079241.1296] vpn-connection[0x55d50fe6c360,80e2f0de-fbd1-4735-8cc4-156bf8b5ae34,"vpn pptp",0]: VPN service disappeared
July 24 00:27:21 abraham pppd[5654]: Terminating on signal 15
July 24 00:27:21 abraham NetworkManager[5654]: Terminating on signal 15
July 24 00:27:21 abraham NetworkManager[5654]: Modem hangup

Ping to gateway is OK, I get response. When tring use telnet, no response:

$ telnet subhostname.hostname.cz 1723
 

As I understand it right, server do not respond. But, it should work since my colleagues with Windows 10 have no problems. I disabled firewall. Traceroute gives me reasonable path. For the sake of completeness I provide NetworkManager VPN config:

Gateway: subhostname.hostname.cz
Authentication: check only MSCHAPv2 (no combination works tho)
Use Point-to-Point encryption (MPPE): checked
Send PPP echo packets: checked
Nothing else is checked. 
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