linux - Problems with SCP stalling during file copy over VPN -

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i have series of files need copy via scp on vpn remote linux server virtual linux server. files not large(4m-500m), file copy stalls. seems network disconnect after that, because could't receive reply ping operation. , have restart network service.

the virtual linux server's os centos 6.4, , use pptp vpn client.

from /var/log/messages find messages this:

pptp[14514]: anon log[decaps_gre:pptp_gre.c:414]: buffering packet 1181 (expecting 1043, lost or reordered) pptp[14514]: anon log[decaps_gre:pptp_gre.c:414]: buffering packet 1182 (expecting 1043, lost or reordered) pptp[14514]: anon log[decaps_gre:pptp_gre.c:414]: buffering packet 1183 (expecting 1043, lost or reordered) ... rsyslogd-2177: imuxsock begins drop messages pid 14514 due rate-limiting rsyslogd-2177: imuxsock lost 130 messages pid 14514 due rate-limiting ... anon log[decaps_gre:pptp_gre.c:414]: buffering packet 104763 (expecting 104761, lost or reordered) anon log[decaps_gre:pptp_gre.c:414]: buffering packet 104764 (expecting 104761, lost or reordered) anon log[decaps_gre:pptp_gre.c:414]: buffering packet 104765 (expecting 104761, lost or reordered) ... anon warn[decaps_gre:pptp_gre.c:426]: discarding bogus packet 105383 (expecting 104814) anon warn[decaps_gre:pptp_gre.c:426]: discarding bogus packet 105384 (expecting 104814) anon warn[decaps_gre:pptp_gre.c:426]: discarding bogus packet 105385 (expecting 104814)

what have tried far:

  • limit speed of scp

  • modify mtu of ppp0 1492(according this question)

both of them not worked.

ok, not solve problem, used way achieve goal.

i find way copy file remote server, rsync command. it's more fast scp.

more details can found questions: what difference between scp , rsync

hope can help.


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