Re: Problem with net.inet.tcp.path_mtu_discovery=1

Michael Sierchio <[email protected]>
Newsgroups gmane.os.freebsd.questions,gmane.os.freebsd.devel.net
Message-ID <CAHu1Y732tFmLKZWA85npxYRU0UHRWQ1juFYaPDPfaJ+P4ryp5g@mail.gmail.com> 
On Wed, Jun 4, 2025 at 3:58 PM Christos Chatzaras <[email protected]> wrote:
>
> With these settings, is the connection supposed to work even if an intermediate router is dropping the ICMP messages required for Path MTU Discovery? I tried this configuration, but it didn’t resolve the issue.

No. Path MTU Discovery breaks if you drop the ICMP "fragmentation
needed and DF set" packet is sent.
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