В общих чертах ситуация такова: сервак на Debian, был впн (клиент из пакета pptp-linux), после смены провайдера перенастроил только логин/пароль в chap-secrets, да адрес впн сервера в /etc/ppp/peers/vpn0.

Вывод pon vpn0 debug dump logfd 2 nodetach:

pppd options in effect: debug # (from command line) nodetach # (from command line) logfd 2 # (from command line) dump # (from command line) noauth # (from /etc/ppp/options.pptp) refuse-pap # (from /etc/ppp/options.pptp) refuse-chap # (from /etc/ppp/options.pptp) refuse-mschap # (from /etc/ppp/options.pptp) refuse-eap # (from /etc/ppp/options.pptp) name <my_login> # (from /etc/ppp/peers/vpn0) remotename PPTP # (from /etc/ppp/peers/vpn0) # (from /etc/ppp/options.pptp) pty pptp 172.18.48.69 --nolaunchpppd # (from /etc/ppp/peers/vpn0) crtscts # (from /etc/ppp/options) # (from /etc/ppp/options) asyncmap 0 # (from /etc/ppp/options) lcp-echo-failure 4 # (from /etc/ppp/options) lcp-echo-interval 30 # (from /etc/ppp/options) hide-password # (from /etc/ppp/options) ipparam vpn0 # (from /etc/ppp/peers/vpn0) proxyarp # (from /etc/ppp/options) noipx # (from /etc/ppp/options) using channel 12 Using interface ppp0 Connect: ppp0 <--> /dev/pts/1 sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x53e1340f> <pcomp> <accomp>] rcvd [LCP ConfReq id=0x1 <auth chap MD5> <magic 0x343d1492>] No auth is possible sent [LCP ConfRej id=0x1 <auth chap MD5>] rcvd [LCP ConfReq id=0x2 <auth chap MD5> <magic 0x343d1492>] No auth is possible sent [LCP ConfRej id=0x2 <auth chap MD5>] rcvd [LCP ConfReq id=0x3 <auth chap MD5> <magic 0x343d1492>] No auth is possible sent [LCP ConfRej id=0x3 <auth chap MD5>] rcvd [LCP ConfReq id=0x4 <auth chap MD5> <magic 0x343d1492>] No auth is possible sent [LCP ConfRej id=0x4 <auth chap MD5>] rcvd [LCP ConfReq id=0x5 <auth chap MD5> <magic 0x343d1492>] No auth is possible sent [LCP ConfRej id=0x5 <auth chap MD5>] rcvd [LCP ConfReq id=0x6 <auth chap MD5> <magic 0x343d1492>] No auth is possible sent [LCP ConfRej id=0x6 <auth chap MD5>] rcvd [LCP ConfReq id=0x7 <auth chap MD5> <magic 0x343d1492>] No auth is possible sent [LCP ConfRej id=0x7 <auth chap MD5>] rcvd [LCP ConfReq id=0x8 <auth chap MD5> <magic 0x343d1492>] No auth is possible sent [LCP ConfRej id=0x8 <auth chap MD5>] rcvd [LCP ConfReq id=0x9 <auth chap MD5> <magic 0x343d1492>] No auth is possible sent [LCP ConfRej id=0x9 <auth chap MD5>] rcvd [LCP ConfReq id=0xa <auth chap MD5> <magic 0x343d1492>] No auth is possible sent [LCP ConfRej id=0xa <auth chap MD5>] rcvd [LCP TermReq id=0xb] sent [LCP TermAck id=0xb] Script pptp 172.18.48.69 --nolaunchpppd finished (pid 4835), status = 0x0 Modem hangup Connection terminated.

Форумы почитал, пробовал менять сжатие/шифрование в options.pptp - безрезультатно. Буду невероятно благодарен за помощь