VirtualTam's bookmarks

1. feed reader best practices | Rachel By The Bay 2024-10-26

   tags: feed, network/http, network/http/header, personal-knowledge/blog, storage/cache, web/syndication

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   Test feed:

   • feed reader score project
   • A sysadmin's rant about feed readers and crawlers
   • Feeds, updates, 200s, 304s, and now 429s
   • So many feed readers, so many bizarre behaviors
   • The feed reader score service is now online

   RFCs:

   • RFC 1945 - Hypertext Transfer Protocol - HTTP/1.0 - If-Modified-Since
   • RFC 7232 - Hypertext Transfer Protocol (HTTP/1.1): Conditional Requests - Entity Tag (ETag)
   • RFC 9110 - HTTP Semantics

   Related:

   • Bret Simmons - NetNewsWire and Conditional GET Issues
   • John Brayton - Feed Polling for Unread Cloud
   • Jeff Kaufman - Looking at RSS User-Agents
   • Chris Siebenmann - The case of the very old If-Modified-Since HTTP header
   • ETag and HTTP caching
   • HTTP Conditional Requests Explained
   • Caching - What takes precedence: the ETag or Last-Modified HTTP header?
2. (A few) Ops Lessons We All Learn The Hard Way 2023-02-18

   tags: cloud, network/dns, programming/shell, sysadmin

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   28. Blocking TCP port 53 traffic leads to very strange failures. Don't.
   29. The source you're looking at is not the code running in production.
   30. "Prod" is just another name for "staging".

3. serverfault - What are the canonical answers we've discovered over the years? 2021-11-20

   tags: datacenter, linux, network, security, server, sysadmin

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4. The Bastard Operator From Hell Complete 2019-07-04

   tags: linux, parody, sysadmin, system, unix

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   • http://bofh.bjash.com/Quiz1.html
   • http://bofh.bjash.com/ExcuseBoard.html
5. 10 years of self-hosting Linuxwall.info - Quelques digressions sous GPL 2019-06-18

   tags: email, email/dkim, email/spam, linux, network, network/dns, self-hosting, sysadmin

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   • http://wiki.linuxwall.info/doku.php/en:ressources:dossiers:postfix:dkimproxy
   • http://wiki.linuxwall.info/doku.php/en:ressources:dossiers:dspam
   • http://wiki.linuxwall.info/doku.php/fr:ressources:dossiers:postfix:postscreen
6. MIG: Mozilla InvestiGator 2019-05-27

   tags: filesystem, mozilla, network, security, sysadmin

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   • https://github.com/mozilla/mig
   • https://j.vehent.org/blog/index.php?post/2015/07/26/Using-Mozilla-Investigator-%28MIG%29-to-detect-unknown-hosts
   • https://j.vehent.org/blog/index.php?post/2015/09/13/Investigating-authorized-keys-across-the-infrastructure-using-MIG
7. 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
8. Vuls · Agentless Vulnerability Scanner for Linux/FreeBSD 2019-03-22

   tags: programming/testing, security, sysadmin

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   • https://github.com/future-architect/vuls
9. Unix Admin. Horror Story Summary, version 1.0 2019-03-05

   tags: filesystem, linux, network, sysadmin, tale, unix

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10. What is Syslog: Daemons, Message Formats and Protocols - Sematext 2019-02-05

    tags: linux, observability/logging, sysadmin, system, text

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    • https://serverfault.com/questions/692309/what-is-the-difference-between-syslog-rsyslog-and-syslog-ng
11. 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
12. OpenVAS - OpenVAS - Open Vulnerability Assessment System 2018-06-14

    tags: network, operating-system, security, sysadmin

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13. GLPI Project – Open Source IT Asset management and Helpdesk software 2018-06-14

    tags: hardware, infrastructure, server, sysadmin

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    • https://github.com/glpi-project/glpi
14. Running Ansible Through an SSH Bastion Host 2018-05-17

    tags: configuration-management/ansible, network, network/proxy, network/ssh, tunnel

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    • https://blog.scottlowe.org/2015/11/21/using-ssh-bastion-host/
    • https://blog.scottlowe.org/2015/12/04/use-case-ssh-bastion-host/
    • https://blog.scottlowe.org/2015/12/11/using-ssh-multiplexing/
    • https://dotfiles.tnetconsulting.net/articles/2015/0506/empowering-openssh.html
    • https://www.redhat.com/sysadmin/ssh-proxy-bastion-proxyjump
    • https://docs.ansible.com/ansible/latest/reference_appendices/faq.html#how-do-i-configure-a-jump-host-to-access-servers-that-i-have-no-direct-access-to
    • https://gist.github.com/seansawyer/8fe009e67f7e01344328
15. Stack Exchange Data Dump : Stack Exchange, Inc. : Free Download, Borrow, and Streaming : Internet Archive 2018-05-15

    tags: data, development, dump, knowledge, linux, network, programming/c, programming/c++, programming/php, programming/python, sysadmin, wiki

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    • https://meta.stackexchange.com/questions/224873/all-stack-exchange-data-dumps
    • https://stackoverflow.blog/tags/cc-wiki-dump/
    • https://stackexchange.com/legal/terms-of-service
16. Sensu @ Yelp!: A Guided Tour 2018-04-04

    tags: network, observability, sensu, sysadmin

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    • https://vimeo.com/92770954
    • https://vimeo.com/92838680
17. Migrating to Sensu 2018-04-04

    tags: database/redis, message-broker/rabbitmq, network, network/http-server/haproxy, network/http-server/nginx, observability, observability/nagios, sensu, sysadmin

    [ permalink ]

    • https://roobert.github.io/2015/11/09/Sensu-What/
    • https://blog.sensuapp.org/our-journey-implementing-sensu-to-monitor-kubernetes-in-production-5764aff2dd50
    • https://phillbarber.blogspot.fr/2015/03/nagios-vs-sensu-vs-icinga2.html
    • https://www.reddit.com/r/devops/comments/56xrnj/how_are_people_suffering_through_sensu_core/
18. Stop using Nagios 2018-04-04

    tags: network, observability, observability/nagios, sensu, sysadmin

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    • https://www.reddit.com/r/devops/comments/3fo0uo/stop_using_nagios/
19. Monitoring Portal 2018-04-02

    tags: community, forum, linux, network, observability, sysadmin

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20. Introducing the new SourceForge 2018-01-10

    tags: collaborative, community, source-code-management, source-code-management/git, source-code-management/subversion, web

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    • https://www.reddit.com/r/opensource/comments/7p94h3/introducing_the_new_sourceforge/
    • https://www.reddit.com/r/sysadmin/comments/4n3e1s/the_state_of_sourceforge_since_its_acquisition_in/
    • https://arstechnica.com/information-technology/2016/06/under-new-management-sourceforge-moves-to-put-badness-in-past/
    • https://sourceforge.net/blog/sourceforge-now-scans-all-projects-for-malware-and-displays-warnings-on-downloads/