VirtualTam's bookmarks

1. Comcast Proxy - Simulating shitty network connections so you can build better systems 2024-03-10

   tags: network/proxy, programming/go, programming/testing/integration, quality-of-service

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   • Sometimes Kill -9 Isn’t Enough
2. Debian Package Repository - Instructions to connect to a third-party repository (with Ansible) 2024-01-06

   tags: configuration-management/ansible, cryptography/pgp, cryptography/pgp/gnupg, linux/debian, linux/ubuntu, packaging

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   • apt_key deprecated in Debian/Ubuntu - how to fix in Ansible
   • ansible.builtin.deb822_repository - Add and remove deb822 formatted repositories
   • ansible/ansible#78063 - ansible.builtin.apt_key adds keys to a deprecated location
   • Example usages of the new deb822_repository Ansible module
   • Ubuntu [Spec] APT deb822 sources by default
3. jackc/pgx - PostgreSQL Driver and Toolkit 2023-07-04

   tags: concurrency, database/postgresql, programming/go

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   • Getting started with pgx
   • https://donchev.is/post/working-with-postgresql-in-go-using-pgx/
   • jackc/pgx/v5/pgtype - Map between all common base types directly between Go and PostgreSQL
   • jackc/pgx/v5/pgxpool - Concurrency-safe connection pool for pgx
   • scany/v2/pgxscan - Scan data into Go structs and other composite types
   • Bulk INSERT in Postgres in GO using pgx
   • Postgres table batch updates using golang pgxpool not reflected in database
   • pgx.Conn can see uncommitted changes made from a pgx.Tx - TL;DR use pgxpool for concurrency-safe transactions
   • Not clear if caller is required to close in case of QueryRow or if QueryRow properly closes in case of error
4. Mitogen for Ansible | A redesigned UNIX connection layer and module runtime for Ansible 2023-01-28

   tags: configuration-management/ansible, network/ssh, programming/python

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   • https://github.com/mitogen-hq/mitogen
   • https://mitogen.networkgenomics.com/howitworks.html
   • https://news.ycombinator.com/item?id=15355144
5. Falsehoods Programmers Believe About Search - OpenSource Connections 2022-05-31

   tags: programming, search-engine, web

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6. How to Monitor Who’s Connected to Your WireGuard VPN | Pro Custodibus 2021-08-21

   tags: cryptography, framework/vue.js, network/ssh, network/vpn/wireguard, observability, programming/go, programming/javascript

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   • https://github.com/vx3r/wg-gen-web
   • https://github.com/jamescun/wg-api
   • https://git.zx2c4.com/wireguard-tools/about/src/man/wg.8
7. Dropbear SSH - a relatively small SSH server and client 2021-08-08

   tags: network/ssh, programming/c, security/authentication

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   • https://github.com/mkj/dropbear
   • https://www.cyberciti.biz/security/how-to-unlock-luks-using-dropbear-ssh-keys-remotely-in-linux/
   • Dropbear SSH closing connection when attempting to connect as non root user
8. New LibSSH Connection Plugin for Ansible Network Replaces Paramiko, Adds FIPS Mode Enablement 2021-01-31

   tags: configuration-management/ansible, infrastructure/automation, network/ssh, programming/python

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   • https://pypi.org/project/ansible-pylibssh/
   • https://www.libssh.org/
9. amqproxy: An intelligent AMQP proxy, with connection and channel pooling/reusing 2019-06-12

   tags: message-broker/rabbitmq, message-queue, network/amqp, network/proxy, performance, programming/php

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   • https://www.cloudamqp.com/blog/2019-05-29-maintaining-long-lived-connections-with-AMQProxy.html
10. dex: OpenID Connect Identity (OIDC) and OAuth 2.0 Provider with Pluggable Connectors 2019-06-11

    tags: network/ldap, programming/go, security/authentication, security/authorization, security/openid, security/token

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11. Blaeu, creating measurements on RIPE Atlas probes 2019-04-15

    tags: internet, internet-service-provider, network, network/dns, network/ip, sysadmin

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    • https://atlas.ripe.net/
    • https://www.ripe.net/manage-ips-and-asns/resource-management/faq/independent-resources/phase-three/what-is-a-local-internet-registry-lir
    • https://labs.ripe.net/Members/stephane_bortzmeyer/using-ripe-atlas-to-debug-network-connectivity-problems
    • https://github.com/RIPE-Atlas-Community/ripe-atlas-community-contrib
    • https://www.bortzmeyer.org/dns-over-tls-atlas-measures.html
12. hydra: OpenID Connect certified OAuth2 Server - cloud native, security-first, open source API security for your infrastructure. Written in Go. SDKs for any language. 2019-03-13

    tags: programming/go, security, security/authentication, security/authorization, security/oauth, security/openid

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13. xpadneo | Advanced Linux Driver for Xbox One Wireless Controller (shipped with Xbox One S) 2019-02-01

    tags: bluetooth, game, gamepad, hardware, linux, wireless

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    • https://github.com/atar-axis/xpadneo/
    • https://aur.archlinux.org/packages/xpadneo-dkms-git/
    • https://www.gamingonlinux.com/articles/xpadneo-is-an-advanced-linux-driver-for-the-xbox-one-s-wireless-gamepad.11875
    • https://askubuntu.com/questions/783587/how-do-i-get-an-xbox-one-controller-to-work-with-16-04-not-steam
    • https://www.reddit.com/r/linux_gaming/comments/63t87i/connecting_xbox_one_s_controllers_with_bluetooth/
    • https://github.com/paroj/xpad
    • https://github.com/360Controller/360Controller
14. Andrea Gibbons - Just communities, just cities, Just connections between country and city. Also, the weird and wonderful. 2018-08-20

    tags: architecture, building, city, garden, people, street, urban

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    • http://writingcities.com/2015/07/23/donald-appleyard-on-creating-livable-streets/
    • http://writingcities.com/2015/06/02/the-social-life-of-small-urban-places-or-things-planners-should-know-but-still-dont/
    • http://writingcities.com/2015/04/30/topophilia-pt-1/
    • http://writingcities.com/2015/05/15/how-to-study-public-life-the-danish-way/
    • http://writingcities.com/2015/12/03/3899/
    • https://vimeo.com/16399180
15. Getting The PHP-FPM Status From The Command Line | Max Chadwick 2018-07-26

    tags: command-line, network/socket, programming/php, status

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    • https://brandonwamboldt.ca/understanding-the-php-fpm-status-page-1603/
    • http://www.gregfreeman.io/2016/how-to-connect-to-php-fpm-directly-to-resolve-issues-with-blank-pages/
    • https://www.thatsgeeky.com/2012/02/directly-connecting-to-php-fpm/
    • https://easyengine.io/tutorials/php/fpm-status-page/

    $ SCRIPT_NAME=/status \
        SCRIPT_FILENAME=/status \
        QUERY_STRING=json \
        REQUEST_METHOD=GET \
        cgi-fcgi -bind -connect /var/run/php/php7.0-fpm.sock \
        | grep '{' \
        | jq '.'
    

16. iptables 2018-07-04

    tags: linux, linux/iptables, network, network/firewall, network/router, sysadmin

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    Documentation:

    • https://www.netfilter.org/documentation/index.html
    • https://www.netfilter.org/documentation/HOWTO//netfilter-hacking-HOWTO.html
    • https://www.netfilter.org/documentation/HOWTO//networking-concepts-HOWTO.html
    • https://www.netfilter.org/documentation/HOWTO//NAT-HOWTO.html
    • https://www.netfilter.org/documentation/HOWTO//packet-filtering-HOWTO.html
      • https://www.netfilter.org/documentation/HOWTO//packet-filtering-HOWTO-6.html
      • https://www.netfilter.org/documentation/HOWTO//packet-filtering-HOWTO-7.html

    Articles:

    • https://www.digitalocean.com/community/tutorials/how-the-iptables-firewall-works
    • https://www.digitalocean.com/community/tutorials/how-to-list-and-delete-iptables-firewall-rules
    • https://www.digitalocean.com/community/tutorials/iptables-essentials-common-firewall-rules-and-commands
    • https://www.digitalocean.com/community/tutorials/a-deep-dive-into-iptables-and-netfilter-architecture
    • https://www.digitalocean.com/community/tutorials/how-to-choose-an-effective-firewall-policy-to-secure-your-servers

    How-tos:

    • https://wiki.centos.org/HowTos/Network/IPTables
    • https://www.digitalocean.com/community/tutorials/how-to-set-up-a-firewall-using-iptables-on-ubuntu-14-04

    Routing:

    • https://www.frozentux.net/iptables-tutorial/iptables-tutorial.html
    • https://www.frozentux.net/iptables-tutorial/images/tables_traverse.jpg
    • https://www.frozentux.net/iptables-tutorial/images/table_subtraverse.jpg
    • https://upload.wikimedia.org/wikipedia/commons/3/37/Netfilter-packet-flow.svg

    RHEL Documentation:

    • https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/security_guide/sect-security_guide-firewalls-common_iptables_filtering
    • https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/security_guide/sect-security_guide-firewalls-forward_and_nat_rules
    • https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/security_guide/sect-security_guide-firewalls-malicious_software_and_spoofed_ip_addresses
    • https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/security_guide/sect-security_guide-firewalls-iptables_and_connection_tracking
    • https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/security_guide/sect-security_guide-iptables
    • https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/security_guide/sec-setting_and_controlling_ip_sets_using_iptables
17. Linux - Network over USB (usbnet) 2018-04-03

    tags: ethernet, linux, microsoft/windows, network, raspberry-pi, usb

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    • http://www.linux-usb.org/usbnet/

    • http://www.davehylands.com/linux/gumstix/usbnet/

    • https://en.wikipedia.org/wiki/Ethernet_over_USB

    • https://superuser.com/questions/145933/how-to-add-usbnet-driver-to-the-linux-kernel#145944

    • https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/net/usb/usbnet.c

    • https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/net/usb/cdc_ether.c

    • https://www.systutorials.com/linux-kernels/tag/cdc_ether/

    • https://raspberrypi.stackexchange.com/questions/9636/usb-to-usb-mimicking-ethernet

    • https://www.raspberrypi.org/forums/viewtopic.php?f=36&t=131042

    • https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=130810

    • https://www.raspberrypi.org/forums/viewtopic.php?p=865905#p865905

    • https://raspberrypi.stackexchange.com/questions/13917/raspberry-pi-communication-over-usb

    • http://wiki.openmoko.org/wiki/USB_Networking

    • http://www.webos-internals.org/wiki/USBnet_Setup

    • https://developer.ridgerun.com/wiki/index.php/How_to_use_USB_device_networking

    • http://www.ev3dev.org/docs/tutorials/connecting-to-the-internet-via-usb/

18. connecting... the dots — storytelling with data 2018-02-22

    tags: data, line, plot, visualization

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19. Axe-FX II Linux support? | Fractal Audio Systems Forum 2018-02-10

    tags: audio, axe-fx, gear, hardware, linux

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    • http://wiki.fractalaudio.com/axefx2/index.php?title=USB_connection
    • http://wiki.fractalaudio.com/axefx2/index.php?title=Digital_audio:_USB_Audio,_SPDIF,_AES
    • https://forum.fractalaudio.com/threads/axe-fx-ii-and-linux-again.79061/
20. This is strictly a violation of the TCP specification 2017-12-21

    tags: linux, network, network/http, network/proxy, network/socket, strace

    [ permalink ]

    • https://support.cloudflare.com/hc/en-us/articles/200171906-Error-522-Connection-timed-out
    • https://access.redhat.com/solutions/437133
    • https://benohead.com/tcp-about-fin_wait_2-time_wait-and-close_wait/
    • https://github.com/cloudflare/cloudflare-blog/blob/master/2016-08-time-out/listener.go