net/tcpmssd 1.1_2 DragonFly

Utility to correct requested TCP receive segment size

System: DragonFly
Repository: DPorts
Maintainer: [email protected] (as in FreeBSD)
Categories: net
Package size: 6.9 KiB, 12.6 KiB installed

Description

tcpmssd was written by Ruslan Ermilov <[email protected]> based on work done by Patrick Bihan-Faou <[email protected]>.

tcpmssd is a divert(4) program that adjusts outgoing TCP data so that the requested segment size is not greater than the amount allowed by the interface MTU.

This is necessary in many setups to avoid problems caused by routers that drop ICMP Datagram Too Big messages. Without these messages, the originating machine sends data, it passes the rogue router then hits a machine that has an MTU that is not big enough for the data. Because the IP Don't Fragment option is set, this machine sends an ICMP Datagram Too Big message back to the originator and drops the packet. The rogue router drops the ICMP message and the originator never gets to discover that it must reduce the fragment size or drop the IP Don't Fragment option from its outgoing data.

In the other systems

System

Port

Version

DragonFly

net/tcpmssd

1.1_2

FreeBSD

net/tcpmssd

1.1_2

HardenedBSD

net/tcpmssd

1.1_2

GhostBSD

net/tcpmssd

1.1_2

Install

Binary package:

pkg install tcpmssd

From DPorts:

cd /usr/dports/net/tcpmssd && make install clean

Dependencies

No port depends on this one.

Configuration

No options to configure.

Service scripts: none

Message after installing

===>   NOTICE:

The tcpmssd port currently does not have a maintainer. As a result, it is
more likely to have unresolved issues, not be up-to-date, or even be removed in
the future. To volunteer to maintain this port, please create an issue at:

https://bugs.freebsd.org/bugzilla

More information about port maintainership is available at:

https://docs.freebsd.org/en/articles/contributing/#ports-contributing