Bug 240416 - Windows scaling (net.inet.tcp.rfc1323=1) does not start the TCP connection to some systems
Summary: Windows scaling (net.inet.tcp.rfc1323=1) does not start the TCP connection to...
Status: New
Alias: None
Product: Base System
Classification: Unclassified
Component: kern (show other bugs)
Version: 12.0-RELEASE
Hardware: Any Any
: --- Affects Only Me
Assignee: freebsd-net mailing list
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2019-09-08 12:32 UTC by IPTRACE
Modified: 2019-09-09 22:21 UTC (History)
1 user (show)

See Also:


Attachments
tcpdump - connection from virtual machine to OVH server (384 bytes, application/octet-stream)
2019-09-08 13:07 UTC, IPTRACE
no flags Details
Established connection from hypervisor to OVH server (1.95 KB, application/octet-stream)
2019-09-08 13:12 UTC, IPTRACE
no flags Details
tcpdump - connection from virtual machine to OVH server without scaling (885 bytes, application/octet-stream)
2019-09-08 13:20 UTC, IPTRACE
no flags Details

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Description IPTRACE 2019-09-08 12:32:43 UTC
Hello, I have an issue with estblishing TCP connection to OVH systems due to enabled windows scaling in FreeBSD on bhyve VMs packet flow.
Please read the thread about my problem.

https://forums.freebsd.org/threads/no-network-connection-between-specific-mail-servers.70271/
Comment 1 IPTRACE 2019-09-08 13:07:32 UTC
Created attachment 207288 [details]
tcpdump - connection from virtual machine to OVH server
Comment 2 IPTRACE 2019-09-08 13:12:26 UTC
Created attachment 207289 [details]
Established connection from hypervisor to OVH server
Comment 3 IPTRACE 2019-09-08 13:20:36 UTC
Created attachment 207290 [details]
tcpdump - connection from virtual machine to OVH server without scaling