Domain > qoxp.net

More information on this domain is in AlienVault OTX

DNS Resolutions

Date	IP Address
2025-10-02	13.249.205.107 (ClassC)
2025-11-25	3.169.173.120 (ClassC)

HTTP/1.1 200 OKContent-Type: text/html; charsetutf-8Content-Length: 18152Connection: keep-aliveLast-Modified: Mon, 15 Sep 2025 17:26:05 GMTx-amz-server-side-encryption: AES256x-amz-meta-mtime: 1757957163.866300258Accept-Ranges: bytesServer: AmazonS3Date: Tue, 25 Nov 2025 23:14:29 GMTETag: 93190886cce486390345e3b89a16a267X-Cache: RefreshHit from cloudfrontVia: 1.1 9a4713706b0c5d2719c0ce83795d8ec2.cloudfront.net (CloudFront)X-Amz-Cf-Pop: HIO52-P4X-Amz-Cf-Id: mEFBTMiTJCpL4IHlM3-6B11Sk4ZBjlyBcPdF8oSbFbT4kzVz9xrM9A

!doctype html>html langen classno-js>  head>          meta charsetutf-8>      meta nameviewport contentwidthdevice-width,initial-scale1>                          link relcanonical hrefhttps://www.qoxp.net/>                                                  link relicon hrefassets/images/favicon.png>      meta namegenerator contentmkdocs-1.6.1, mkdocs-material-9.6.20+insiders-4.53.17>                      title>Home - qoxp.net/title>                    link relstylesheet hrefassets/stylesheets/main.6f439c71.min.css>                      link relstylesheet hrefassets/stylesheets/palette.ab4e12ef.min.css>                                                                link relpreconnect hrefhttps://fonts.gstatic.com crossorigin>        link relstylesheet hrefhttps://fonts.googleapis.com/css?familyRoboto:300,300i,400,400i,700,700i%7CRoboto+Mono:400,400i,700,700i&displayfallback>        style>:root{--md-text-font:Roboto;--md-code-font:Roboto Mono}/style>                    link relstylesheet hrefextra.css>        script>__md_scopenew URL(.,location),__md_hashe>...e.reduce(((e,_)>(e5)-e+_.charCodeAt(0)),0),__md_get(e,_localStorage,t__md_scope)>JSON.parse(_.getItem(t.pathname+.+e)),__md_set(e,_,tlocalStorage,a__md_scope)>{try{t.setItem(a.pathname+.+e,JSON.stringify(_))}catch(e){}}/script>                    /head>                                      body dirltr data-md-color-schemedefault data-md-color-primaryblue-grey data-md-color-accentindigo>          input classmd-toggle data-md-toggledrawer typecheckbox id__drawer autocompleteoff>    input classmd-toggle data-md-togglesearch typecheckbox id__search autocompleteoff>    label classmd-overlay for__drawer>/label>    div data-md-componentskip>                      a href#professional classmd-skip>          Skip to content        /a>          /div>    div data-md-componentannounce>          /div>                header classmd-header md-header--shadow md-header--lifted data-md-componentheader>  nav classmd-header__inner md-grid aria-labelHeader>    a href. titleqoxp.net classmd-header__button md-logo aria-labelqoxp.net data-md-componentlogo>          svg xmlnshttp://www.w3.org/2000/svg viewBox0 0 24 24>path dM12 8a3 3 0 0 0 3-3 3 3 0 0 0-3-3 3 3 0 0 0-3 3 3 3 0 0 0 3 3m0 3.54C9.64 9.35 6.5 8 3 8v11c3.5 0 6.64 1.35 9 3.54 2.36-2.19 5.5-3.54 9-3.54V8c-3.5 0-6.64 1.35-9 3.54/>/svg>    /a>    label classmd-header__button md-icon for__drawer>            svg xmlnshttp://www.w3.org/2000/svg viewBox0 0 24 24>path dM3 6h18v2H3zm0 5h18v2H3zm0 5h18v2H3z/>/svg>    /label>    div classmd-header__title data-md-componentheader-title>      div classmd-header__ellipsis>        div classmd-header__topic>          span classmd-ellipsis>            a href/ titleHome aria-labelqoxp.net>              qoxp.net            /a>          /span>        /div>        div classmd-header__topic data-md-componentheader-topic>          span classmd-ellipsis>                          Home                      /span>        /div>      /div>    /div>                  form classmd-header__option data-md-componentpalette>                  input classmd-option data-md-color-media(prefers-color-scheme: light) data-md-color-schemedefault data-md-color-primaryblue-grey data-md-color-accentindigo  aria-labelswitch to dark mode  typeradio name__palette id__palette_0>          label classmd-header__button md-icon titleswitch to dark mode for__palette_1 hidden>        svg xmlnshttp://www.w3.org/2000/svg viewBox0 0 24 24>path dM12 8a4 4 0 0 0-4 4 4 4 0 0 0 4 4 4 4 0 0 0 4-4 4 4 0 0 0-4-4m0 10a6 6 0 0 1-6-6 6 6 0 0 1 6-6 6 6 0 0 1 6 6 6 6 0 0 1-6 6m8-9.31V4h-4.69L12 .69 8.69 4H4v4.69L.69 12 4 15.31V20h4.69L12 23.31 15.31 20H20v-4.69L23.31 12z/>/svg>      /label>                      input classmd-option data-md-color-media(prefers-color-scheme: dark) data-md-color-schemeslate data-md-color-primaryblue-grey data-md-color-accentindigo  aria-labelswitch to light mode  typeradio name__palette id__palette_1>          label classmd-header__button md-icon titleswitch to light mode for__palette_2 hidden>        svg xmlnshttp://www.w3.org/2000/svg viewBox0 0 24 24>path dM12 18c-.89 0-1.74-.2-2.5-.55C11.56 16.5 13 14.42 13 12s-1.44-4.5-3.5-5.45C10.26 6.2 11.11 6 12 6a6 6 0 0 1 6 6 6 6 0 0 1-6 6m8-9.31V4h-4.69L12 .69 8.69 4H4v4.69L.69 12 4 15.31V20h4.69L12 23.31 15.31 20H20v-4.69L23.31 12z/>/svg>      /label>                      input classmd-option data-md-color-media(prefers-color-scheme) data-md-color-schemedefault data-md-color-primaryblue-grey data-md-color-accentindigo  aria-labelautomatic light/dark mode  typeradio name__palette id__palette_2>          label classmd-header__button md-icon titleautomatic light/dark mode for__palette_0 hidden>        svg xmlnshttp://www.w3.org/2000/svg viewBox0 0 24 24>path dm14.3 16-.7-2h-3.2l-.7 2H7.8L11 7h2l3.2 9zM20 8.69V4h-4.69L12 .69 8.69 4H4v4.69L.69 12 4 15.31V20h4.69L12 23.31 15.31 20H20v-4.69L23.31 12zm-9.15 3.96h2.3L12 9z/>/svg>      /label>      /form>                    script>var palette__md_get(__palette);if(palette&&palette.color){if((prefers-color-scheme)palette.color.media){var mediamatchMedia((prefers-color-scheme: light)),inputdocument.querySelector(media.matches?data-md-color-media(prefers-color-scheme: light):data-md-color-media(prefers-color-scheme: dark));palette.color.mediainput.getAttribute(data-md-color-media),palette.color.schemeinput.getAttribute(data-md-color-scheme),palette.color.primaryinput.getAttribute(data-md-color-primary),palette.color.accentinput.getAttribute(data-md-color-accent)}for(varkey,valueof Object.entries(palette.color))document.body.setAttribute(data-md-color-+key,value)}/script>                  /nav>            nav classmd-tabs aria-labelTabs data-md-componenttabs>  div classmd-grid>    ul classmd-tabs__list>                                li classmd-tabs__item md-tabs__item--active>      a href. classmd-tabs__link>                    Home      /a>    /li>            /ul>  /div>/nav>      /header>        div classmd-container data-md-componentcontainer>                                main classmd-main data-md-componentmain>        div classmd-main__inner md-grid>                                                  div classmd-sidebar md-sidebar--primary data-md-componentsidebar data-md-typenavigation >                div classmd-sidebar__scrollwrap>                  div classmd-sidebar__inner>                      nav classmd-nav md-nav--primary md-nav--lifted aria-labelNavigation data-md-level0>  label classmd-nav__title for__drawer>    a href. titleqoxp.net classmd-nav__button md-logo aria-labelqoxp.net data-md-componentlogo>          svg xmlnshttp://www.w3.org/2000/svg viewBox0 0 24 24>path dM12 8a3 3 0 0 0 3-3 3 3 0 0 0-3-3 3 3 0 0 0-3 3 3 3 0 0 0 3 3m0 3.54C9.64 9.35 6.5 8 3 8v11c3.5 0 6.64 1.35 9 3.54 2.36-2.19 5.5-3.54 9-3.54V8c-3.5 0-6.64 1.35-9 3.54/>/svg>    /a>    a href/ titleHome>qoxp.net/a>  /label>    ul classmd-nav__list data-md-scrollfix>                                  li classmd-nav__item md-nav__item--active>            input classmd-nav__toggle md-toggle typecheckbox id__toc>                          label classmd-nav__link md-nav__link--active for__toc>                span classmd-ellipsis>          Home        /span>              span classmd-nav__icon md-icon>/span>        /label>            a href. classmd-nav__link md-nav__link--active>              span classmd-ellipsis>          Home        /span>          /a>              nav classmd-nav md-nav--secondary aria-labelTable of contents>            label classmd-nav__title for__toc>      span classmd-nav__icon md-icon>/span>      Table of contents    /label>    ul classmd-nav__list data-md-componenttoc data-md-scrollfix>              li classmd-nav__item>  a href#professional classmd-nav__link>    span classmd-ellipsis>              Professional          /span>  /a>  /li>              li classmd-nav__item>  a href#background classmd-nav__link>    span classmd-ellipsis>              Background          /span>  /a>  /li>              li classmd-nav__item>  a href#music classmd-nav__link>    span classmd-ellipsis>              Music          /span>  /a>  /li>              li classmd-nav__item>  a href#why-qoxp classmd-nav__link>    span classmd-ellipsis>              Why “QOXP”?          /span>  /a>  /li>          /ul>  /nav>          /li>        /ul>/nav>                  /div>                /div>              /div>                                                    div classmd-sidebar md-sidebar--secondary data-md-componentsidebar data-md-typetoc >                div classmd-sidebar__scrollwrap>                  div classmd-sidebar__inner>                    nav classmd-nav md-nav--secondary aria-labelTable of contents>            label classmd-nav__title for__toc>      span classmd-nav__icon md-icon>/span>      Table of contents    /label>    ul classmd-nav__list data-md-componenttoc data-md-scrollfix>              li classmd-nav__item>  a href#professional classmd-nav__link>    span classmd-ellipsis>              Professional          /span>  /a>  /li>              li classmd-nav__item>  a href#background classmd-nav__link>    span classmd-ellipsis>              Background          /span>  /a>  /li>              li classmd-nav__item>  a href#music classmd-nav__link>    span classmd-ellipsis>              Music          /span>  /a>  /li>              li classmd-nav__item>  a href#why-qoxp classmd-nav__link>    span classmd-ellipsis>              Why “QOXP”?          /span>  /a>  /li>          /ul>  /nav>                  /div>                /div>              /div>                                            div classmd-content data-md-componentcontent>                                                            article classmd-content__inner md-typeset>                                  h1>Richard E. Silverman <A HREFmailto:res@qoxp.net>res@qoxp.net/A>>  img srcheadshot.jpg       stylewidth: 18%; display: block; margin: auto;float: right; border: 2px solid grey>/h1>p>em>web: a hrefhttps://www.qoxp.net/>qoxp.net/a> / spacetime: a hrefhttps://maps.app.goo.gl/puyMnZ31mUR9ruor8>New York City/a> / crypto: a hrefgpg.txt>GnuPG/a> / a hrefhttps://www.linkedin.com/in/richardesilverman/>LinkedIn/a>/em>/p>h2 idprofessional>Professionala classheaderlink href#professional titlePermanent link>¶/a>/h2>p>I make my living doing “computer stuff:” systems administration & engineering, software development, networking, security, etc., mostly with various flavors of Unix. I am also a writer, and have published a few books through a hrefhttps://www.oreilly.com/pub/au/552>O’Reilly/a>:/p>div classgrid cards stylewidth: 90%; margin: auto>ul>li>p>a hrefhttps://www.oreilly.com/library/view/ssh-the-secure/0596008953/>img altSnail Book srcsshtdg2.jpg stylemargin: auto; display: block; border: 1px solid black />    p classbook-caption>SSH: The Secure Shell/p>/a>/p>/li>li>p>a hrefhttps://www.oreilly.com/library/view/linux-security-cookbook/0596003919/>img altLinux Security Cookbook srclinuxsckbk.jpg stylemargin: auto; display: block; border: 1px solid black />    p classbook-caption>Linux Security Cookbook/p>/a>/p>/li>li>p>a hrefhttps://www.oreilly.com/library/view/git-pocket-guide/9781449327507/>img altGit Pocket Guide srcgit.jpg stylemargin: auto; display: block; border: 1px solid black />    p classbook-caption>Git Pocket Guide/p>/a>/p>/li>/ul>/div>h2 idbackground>Backgrounda classheaderlink href#background titlePermanent link>¶/a>/h2>ul>li>BA Computer Science / MA Mathematics: a hrefhttps://wesleyan.edu/>Wesleyan University/a>/li>li>Network Security Research: a hrefhttps://www.bbn.com/>BBN (now part of RTX)/a>/li>li>Systems Engineer: a hrefhttps://www.deshaw.com/>D. E. Shaw & Co., L.P./a>/li>li>Systems Engineer: a hrefhttps://www.arcesium.com/>Arcesium, LLC/a> em>(current)/em>/li>/ul>h2 idmusic>Musica classheaderlink href#music titlePermanent link>¶/a>/h2>p>During the COVID-19 pandemic, I kept myself sane by creating a series of videos of me performing music alone at home via multitrack recording, mostly polyphonic sacred choral music of the Western Baroque and earlier, with some later and instrumental music as well. It’s on YouTube as a hrefhttps://youtube.com/playlist?listPLl2uxqc4L2lAcl30JvPk3fizdZIvW0Bhv>Voices of Quarantine/a>. Here’s one, a humorous COVID-themed riff on a Bach chorale:/p>iframe  width448.0  height252.0  styledisplay: block; margin: auto  srchttps://www.youtube.com/embed/IBg8XNu2C10?start41 title“Sei Gegrüßet” (J.S. Bach & yours truly)  frameborder0  allowaccelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share  referrerpolicystrict-origin-when-cross-origin allowfullscreen>/iframe>p>And another, an exploration of one of the canons in Bach’s em>Musical Offering/em>:/p>iframe  width448.0  height252.0  styledisplay: block; margin: auto  srchttps://www.youtube.com/embed/95J5dWE30DE titleCanon Perpetuus (J.S. Bach)  frameborder0  allowaccelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share  referrerpolicystrict-origin-when-cross-origin allowfullscreen>/iframe>h2 idwhy-qoxp>Why “QOXP”?a classheaderlink href#why-qoxp titlePermanent link>¶/a>/h2>p>One night as an undergrad, I was hacking away at a a hrefhttps://en.wikipedia.org/wiki/VT220>VT-220/a> terminal on the 6th floor of the Science Center at a hrefhttps://www.wesleyan.edu/>Wesleyan University/a>. I had just written a program (in a hrefhttps://en.wikipedia.org/wiki/TOPS-20#PCL_(Programmable_Command_Language)>PCL/a> on a a hrefhttps://en.wikipedia.org/wiki/DECSYSTEM-20>DEC-20/a>), and couldn’t decide what to name it. My friend a hrefhttps://www.linkedin.com/in/lagreenstein/>Lisa Greenstein/a> was sitting nearby, and she whipped up a quick program that started printing out four-letter random words. code>qoxp/code> popped out at me, and the program was named. Years later when I decided to get a personal domain name, it was the natural choice./p>                                  /article>            /div>                    script>var targetdocument.getElementById(location.hash.slice(1));target&&target.name&&(target.checkedtarget.name.startsWith(__tabbed_))/script>        /div>                  button typebutton classmd-top md-icon data-md-componenttop hidden>    svg xmlnshttp://www.w3.org/2000/svg viewBox0 0 24 24>path dM13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z/>/svg>  Back to top/button>              /main>              footer classmd-footer>          div classmd-footer-meta md-typeset>    div classmd-footer-meta__inner md-grid>      div classmd-copyright>      div classmd-copyright__highlight>      © 2025 Richard E. Silverman    /div>        Made with    a hrefhttps://squidfunk.github.io/mkdocs-material/ target_blank relnoopener>      Material for MkDocs Insiders    /a>  /div>          /div>  /div>/footer>          /div>    div classmd-dialog data-md-componentdialog>      div classmd-dialog__inner md-typeset>/div>    /div>          div classmd-progress data-md-componentprogress roleprogressbar>/div>                              script id__config typeapplication/json>{annotate: null, base: ., features: content.code.copy, navigation.expand, navigation.footer, navigation.indexes, navigation.instant, navigation.instant.progress, navigation.path, navigation.sections, navigation.tabs, navigation.tabs.sticky, navigation.top, navigation.tracking, navigation.instant.prefetch, search: assets/javascripts/workers/search.26099bd0.min.js, tags: null, translations: {clipboard.copied: Copied to clipboard, clipboard.copy: Copy to clipboard, search.result.more.one: 1 more on this page, search.result.more.other: # more on this page, search.result.none: No matching documents, search.result.one: 1 matching document, search.result.other: # matching documents, search.result.placeholder: Type to start searching, search.result.term.missing: Missing, select.version: Select version}, version: null}/script>              script srcassets/javascripts/bundle.9d1edc04.min.js>/script>            /body>/html>

Port 443

HTTP/1.1 200 OKContent-Type: text/html; charsetutf-8Content-Length: 18152Connection: keep-aliveLast-Modified: Mon, 15 Sep 2025 17:26:05 GMTx-amz-server-side-encryption: AES256x-amz-meta-mtime: 1757957163.866300258Accept-Ranges: bytesServer: AmazonS3Date: Tue, 25 Nov 2025 23:14:29 GMTETag: 93190886cce486390345e3b89a16a267X-Cache: Hit from cloudfrontVia: 1.1 11017c4db22106ac70e16ce75190a430.cloudfront.net (CloudFront)X-Amz-Cf-Pop: HIO52-P4X-Amz-Cf-Id: DCVeAwPXJ_qK52wt_KK11JH_bFDaLDAIMDMnpwxt5vs3PPCGLzzD1A

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