Skip to content

Instantly share code, notes, and snippets.

@nitred
nitred / optimal_mtu.md
Last active June 8, 2026 11:07
Wireguard Optimal MTU

About

  • I faced bandwidth issues between a WG Peer and a WG server. Download bandwidth when downloading from WG Server to WG peer was reduced significantly and upload bandwidth was practically non existent.
  • I found a few reddit posts that said that we need to choose the right MTU. So I wrote a script to find an optimal MTU.
  • Ideally I would have liked to have run all possible MTU configurations for both WG Server and WG Peer but for simplicity I choose to fix the WG Server to the original 1420 MTU and tried all MTUs from 1280 to 1500 for the WG Peer.

Testing

  • On WG server, I started an iperf3 server
  • On WG peer, I wrote a script that does the following:
    • wg-quick down wg0
  • Edit MTU in the /etc/wireguard/wg0.conf file
@lelegard
lelegard / win10-sshd.md
Last active May 30, 2026 09:26
Installing Windows 10 "built-in" SSH Server

Installing Windows 10 "built-in" SSH Server

Starting with Windows 10 build 1709, Windows integrates a port of OpenSSH, client and server.

This note describes how to install and configure the OpenSSH server sshd and run PowerShell scripts on a remote Windows server, from a Unix system, using SSH and public key authentication (no password).

Note: The way OpenSSH has been integrated in Windows 10 has changed a lot between versions 1709 and 21H2 of Windows 10. The Gist was updated several times to reflect the changes. This version applies to Windows 10 21H2.

OpenSSH server installation

@zzzeek
zzzeek / gist:8443477
Last active January 27, 2022 03:18
expands upon the SQLAlchemy "test rollback fixure" at http://docs.sqlalchemy.org/en/rel_0_9/orm/session.html#joining-a-session-into-an-external-transaction to also support tests that have any combination of ROLLBACK/COMMIT within them, by ensuring that the Session always runs transactions inside of a savepoint.
from sqlalchemy import Column, Integer, create_engine
from sqlalchemy.ext.declarative import declarative_base
Base = declarative_base()
# a model
class Thing(Base):
__tablename__ = 'thing'
id = Column(Integer, primary_key=True)
@paraboul
paraboul / command line
Created March 14, 2012 16:03
JavaScript + C Preprocessor
/usr/bin/cpp -P -undef -Wundef -std=c99 -nostdinc -Wtrigraphs -fdollars-in-identifiers -C < foo.js