{"id":7334,"date":"2022-04-19T15:52:50","date_gmt":"2022-04-19T12:52:50","guid":{"rendered":"https:\/\/vasexperts.com\/?p=7334"},"modified":"2025-08-13T14:19:00","modified_gmt":"2025-08-13T11:19:00","slug":"study-pptp-connection-test","status":"publish","type":"post","link":"https:\/\/vasexperts.com\/es\/blog\/telecom\/study-pptp-connection-test\/","title":{"rendered":"Ensayo de una conexi\u00f3n PPTP"},"content":{"rendered":"<h2>Objetivo<\/h2>\r\n<ol>\r\n \t<li>Implementar un servidor PPTP y un cliente PPTP en diferentes contenedores docker en interfaces virtuales (veth), simulando as\u00ed una conexi\u00f3n PPTP real en el mismo host. El diagrama de conexi\u00f3n se presenta en la figura 1.<\/li>\r\n \t<li>Implemente una conexi\u00f3n en las interfaces f\u00edsicas de la tarjeta probada. El diagrama de conexi\u00f3n se muestra en la Figura 2.<\/li>\r\n \t<li>Obtenga PCAP para cada m\u00e9todo de conexi\u00f3n y compare los resultados.<\/li>\r\n<\/ol>\r\n\u00a0\r\n<div class=\"table\">\r\n<div class=\"table__body\">\r\n<div class=\"table__row\">\r\n<div class=\"table__cell table__cell--2\">Especificaci\u00f3n    <\/div>  \r\n<div class=\"table__cell table__cell--2\">   <\/div>  \r\n   <\/div>  \r\n<div class=\"table__row\">\r\n<div class=\"table__cell table__cell--2\">CPU   <\/div>  \r\n<div class=\"table__cell table__cell--2\">Intel(R) Xeon(R) CPU E3-1240 V2 @ 3.40GHz   <\/div>  \r\n   <\/div>  \r\n<div class=\"table__row\">\r\n<div class=\"table__cell table__cell--2\">Memory   <\/div>  \r\n<div class=\"table__cell table__cell--2\">Total 16GiB @ 1600MHz   <\/div>  \r\n   <\/div>  \r\n<div class=\"table__row\">\r\n<div class=\"table__cell table__cell--2\">NIC   <\/div>  \r\n<div class=\"table__cell table__cell--2\">Ethernet Controller E810-C Dual-Port 100GbE QSFP   <\/div>  \r\n   <\/div>  \r\n<div class=\"table__row\">\r\n<div class=\"table__cell table__cell--2\">Operating System   <\/div>  \r\n<div class=\"table__cell table__cell--2\">Linux CentOS   <\/div>  \r\n   <\/div>  \r\n<div class=\"table__row\">\r\n<div class=\"table__cell table__cell--2\">Linux kernel version   <\/div>  \r\n<div class=\"table__cell table__cell--2\">4.18.0-348.el8.x86_64   <\/div>  \r\n   <\/div>  \r\n<div class=\"table__row\">\r\n<div class=\"table__cell table__cell--2\">Driver   <\/div>  \r\n<div class=\"table__cell table__cell--2\">ice 0.8.2-k   <\/div>  \r\n   <\/div>  \r\n   <\/div>  \r\n   <\/div>  \r\n\u00a0\r\n\r\n<h2>Realizaci\u00f3n<\/h2>\r\n<noscript><img decoding=\"async\" src=\"\/wp-content\/uploads\/2022\/04\/virtual-testing-1140x412-1-1024x370.png\" alt=\"virtual testing\" width=\"100%\" height=\"auto\" class=\"alignnone size-large wp-image-7354\" srcset=\"\/wp-content\/uploads\/2022\/04\/virtual-testing-1140x412-1-1024x370.png 1024w, \/wp-content\/uploads\/2022\/04\/virtual-testing-1140x412-1-300x108.png 300w, \/wp-content\/uploads\/2022\/04\/virtual-testing-1140x412-1-768x278.png 768w, \/wp-content\/uploads\/2022\/04\/virtual-testing-1140x412-1.png 1140w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/noscript><img decoding=\"async\" src=\"\/wp-content\/uploads\/2022\/04\/virtual-testing-1140x412-1-1024x370.png\" alt=\"virtual testing\" width=\"100%\" height=\"auto\" class=\"alignnone size-large wp-image-7354 lazyload\" sizes=\"(max-width: 1024px) 100vw, 1024px\" data-src=\"\/wp-content\/uploads\/2022\/04\/virtual-testing-1140x412-1-1024x370.png\" data-srcset=\"\/wp-content\/uploads\/2022\/04\/virtual-testing-1140x412-1-1024x370.png 1024w, \/wp-content\/uploads\/2022\/04\/virtual-testing-1140x412-1-300x108.png 300w, \/wp-content\/uploads\/2022\/04\/virtual-testing-1140x412-1-768x278.png 768w, \/wp-content\/uploads\/2022\/04\/virtual-testing-1140x412-1.png 1140w\">\r\n<p style=\"text-align: center;\">Figura 1. Esquema de prueba en interfaces virtuales.<\/p>\r\n\r\n<noscript><img decoding=\"async\" src=\"\/wp-content\/uploads\/2022\/04\/physical-testing-1140x466-1-1024x419.png\" alt=\"physical testing\" width=\"100%\" height=\"auto\" class=\"alignnone size-large wp-image-7356\" srcset=\"\/wp-content\/uploads\/2022\/04\/physical-testing-1140x466-1-1024x419.png 1024w, \/wp-content\/uploads\/2022\/04\/physical-testing-1140x466-1-300x123.png 300w, \/wp-content\/uploads\/2022\/04\/physical-testing-1140x466-1-768x314.png 768w, \/wp-content\/uploads\/2022\/04\/physical-testing-1140x466-1.png 1140w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/noscript><img decoding=\"async\" src=\"\/wp-content\/uploads\/2022\/04\/physical-testing-1140x466-1-1024x419.png\" alt=\"physical testing\" width=\"100%\" height=\"auto\" class=\"alignnone size-large wp-image-7356 lazyload\" sizes=\"(max-width: 1024px) 100vw, 1024px\" data-src=\"\/wp-content\/uploads\/2022\/04\/physical-testing-1140x466-1-1024x419.png\" data-srcset=\"\/wp-content\/uploads\/2022\/04\/physical-testing-1140x466-1-1024x419.png 1024w, \/wp-content\/uploads\/2022\/04\/physical-testing-1140x466-1-300x123.png 300w, \/wp-content\/uploads\/2022\/04\/physical-testing-1140x466-1-768x314.png 768w, \/wp-content\/uploads\/2022\/04\/physical-testing-1140x466-1.png 1140w\">\r\n<p style=\"text-align: center;\">Figura 2. Esquema de prueba en interfaces f\u00edsicas.<\/p>\r\n\u00a0\r\n<h2>Resultados<\/h2>\r\n1. PCAP del lado del cliente en el esquema con interfaces virtuales (pptp_w_veth.pcap):\r\n<pre>\"No.\",\"Time\",\"Source\",\"Destination\",\"Protocol\",\"Length\",\"Info\"\r\n\"1\",\"0.000000\",\"172.50.0.2\",\"172.40.0.2\",\"TCP\",\"74\",\"51246 > 1723 [SYN]\r\n\"2\",\"0.000028\",\"172.40.0.2\",\"172.50.0.2\",\"TCP\",\"74\",\"1723 > 51246 [SYN, ACK]\r\n\"3\",\"0.000040\",\"172.50.0.2\",\"172.40.0.2\",\"TCP\",\"66\",\"51246 > 1723 [ACK]\r\n\"4\",\"0.000205\",\"172.50.0.2\",\"172.40.0.2\",\"PPTP\",\"222\",\"Start-Control-Connection-Request\"\r\n\"5\",\"0.000214\",\"172.40.0.2\",\"172.50.0.2\",\"TCP\",\"66\",\"1723 > 51246 [ACK]\r\n\"6\",\"0.000911\",\"172.40.0.2\",\"172.50.0.2\",\"PPTP\",\"222\",\"Start-Control-Connection-Reply\"\r\n\"7\",\"0.000915\",\"172.50.0.2\",\"172.40.0.2\",\"TCP\",\"66\",\"51246 > 1723 [ACK]\r\n\"8\",\"1.000442\",\"172.50.0.2\",\"172.40.0.2\",\"PPTP\",\"234\",\"Outgoing-Call-Request\"\r\n\"9\",\"1.000970\",\"172.40.0.2\",\"172.50.0.2\",\"PPTP\",\"98\",\"Outgoing-Call-Reply\"\r\n\"10\",\"1.000979\",\"172.50.0.2\",\"172.40.0.2\",\"TCP\",\"66\",\"51246 > 1723 [ACK]\r\n\"11\",\"1.001157\",\"172.50.0.2\",\"172.40.0.2\",\"PPP LCP\",\"70\",\"Configuration Request\"\r\n\"12\",\"1.004528\",\"172.40.0.2\",\"172.50.0.2\",\"PPP LCP\",\"70\",\"Configuration Request\"\r\n\"13\",\"1.004620\",\"172.40.0.2\",\"172.50.0.2\",\"PPP LCP\",\"74\",\"Configuration Ack\"\r\n\"14\",\"1.004667\",\"172.50.0.2\",\"172.40.0.2\",\"PPP LCP\",\"74\",\"Configuration Ack\"\r\n\"15\",\"1.004724\",\"172.50.0.2\",\"172.40.0.2\",\"PPP IPCP\",\"64\",\"Configuration Request\"\r\n\"16\",\"1.004832\",\"172.40.0.2\",\"172.50.0.2\",\"PPP CCP\",\"64\",\"Configuration Request\"\r\n\"17\",\"1.004838\",\"172.40.0.2\",\"172.50.0.2\",\"PPP IPCP\",\"58\",\"Configuration Request\"\r\n\"18\",\"1.004864\",\"172.40.0.2\",\"172.50.0.2\",\"PPP IPCP\",\"58\",\"Configuration Reject\"\r\n\"19\",\"1.004908\",\"172.50.0.2\",\"172.40.0.2\",\"PPP CCP\",\"56\",\"Configuration Request\"\r\n\"20\",\"1.004920\",\"172.50.0.2\",\"172.40.0.2\",\"PPP CCP\",\"60\",\"Configuration Reject\"\r\n\"21\",\"1.004939\",\"172.50.0.2\",\"172.40.0.2\",\"PPP IPCP\",\"58\",\"Configuration Ack\"\r\n\"22\",\"1.004971\",\"172.50.0.2\",\"172.40.0.2\",\"PPP IPCP\",\"58\",\"Configuration Request\"\r\n\"23\",\"1.005033\",\"172.40.0.2\",\"172.50.0.2\",\"PPP CCP\",\"56\",\"Configuration Ack\"\r\n\"24\",\"1.005038\",\"172.40.0.2\",\"172.50.0.2\",\"PPP CCP\",\"56\",\"Configuration Request\"\r\n\"25\",\"1.005062\",\"172.40.0.2\",\"172.50.0.2\",\"PPP IPCP\",\"58\",\"Configuration Nak\"\r\n\"26\",\"1.005118\",\"172.50.0.2\",\"172.40.0.2\",\"PPP CCP\",\"56\",\"Configuration Ack\"\r\n\"27\",\"1.005148\",\"172.50.0.2\",\"172.40.0.2\",\"PPP IPCP\",\"58\",\"Configuration Request\"\r\n\"28\",\"1.005205\",\"172.40.0.2\",\"172.50.0.2\",\"PPP IPCP\",\"62\",\"Configuration Ack\"\r\n\"29\",\"1.505778\",\"172.50.0.2\",\"172.40.0.2\",\"GRE\",\"46\",\"Encapsulated PPP\"<\/pre>\r\n\r\n\r\n2.1 PCAP del lado del cliente en el esquema con interfaces f\u00edsicas (pptp_w_810_client.pcap):\r\n<pre>\"No.\",\"Time\",\"Source\",\"Destination\",\"Protocol\",\"Length\",\"Info\"\r\n\"1\",\"0.000000\",\"172.30.0.2\",\"172.10.0.2\",\"TCP\",\"74\",\"33730 > 1723 [SYN]\r\n\"2\",\"0.000067\",\"172.10.0.2\",\"172.30.0.2\",\"TCP\",\"74\",\"1723 > 33730 [SYN, ACK]\r\n\"3\",\"0.000080\",\"172.30.0.2\",\"172.10.0.2\",\"TCP\",\"66\",\"33730 > 1723 [ACK]\r\n\"4\",\"0.000299\",\"172.30.0.2\",\"172.10.0.2\",\"PPTP\",\"222\",\"Start-Control-Connection-Request\"\r\n\"5\",\"0.000324\",\"172.10.0.2\",\"172.30.0.2\",\"TCP\",\"66\",\"1723 > 33730 [ACK]\r\n\"6\",\"0.001052\",\"172.10.0.2\",\"172.30.0.2\",\"PPTP\",\"222\",\"Start-Control-Connection-Reply\"\r\n\"7\",\"0.001058\",\"172.30.0.2\",\"172.10.0.2\",\"TCP\",\"66\",\"33730 > 1723 [ACK]\r\n\"8\",\"1.000567\",\"172.30.0.2\",\"172.10.0.2\",\"PPTP\",\"234\",\"Outgoing-Call-Request\"\r\n\"9\",\"1.001172\",\"172.10.0.2\",\"172.30.0.2\",\"PPTP\",\"98\",\"Outgoing-Call-Reply\"\r\n\"10\",\"1.001192\",\"172.30.0.2\",\"172.10.0.2\",\"TCP\",\"66\",\"33730 > 1723 [ACK]\r\n\"11\",\"1.001354\",\"172.30.0.2\",\"172.10.0.2\",\"PPP LCP\",\"70\",\"Configuration Request\"\r\n\"12\",\"3.997954\",\"172.30.0.2\",\"172.10.0.2\",\"PPP LCP\",\"70\",\"Configuration Request\"\r\n\"13\",\"7.001009\",\"172.30.0.2\",\"172.10.0.2\",\"PPP LCP\",\"70\",\"Configuration Request\"\r\n\"14\",\"10.004123\",\"172.30.0.2\",\"172.10.0.2\",\"PPP LCP\",\"70\",\"Configuration Request\"\r\n\"15\",\"13.007221\",\"172.30.0.2\",\"172.10.0.2\",\"PPP LCP\",\"70\",\"Configuration Request\"\r\n\"16\",\"16.010336\",\"172.30.0.2\",\"172.10.0.2\",\"PPP LCP\",\"70\",\"Configuration Request\"\r\n\"17\",\"19.013400\",\"172.30.0.2\",\"172.10.0.2\",\"PPP LCP\",\"70\",\"Configuration Request\"\r\n\"18\",\"22.016486\",\"172.30.0.2\",\"172.10.0.2\",\"PPP LCP\",\"70\",\"Configuration Request\"\r\n\"19\",\"25.019571\",\"172.30.0.2\",\"172.10.0.2\",\"PPP LCP\",\"70\",\"Configuration Request\"\r\n\"20\",\"28.022668\",\"172.30.0.2\",\"172.10.0.2\",\"PPP LCP\",\"70\",\"Configuration Request\"\r\n\"21\",\"31.032879\",\"172.30.0.2\",\"172.10.0.2\",\"PPTP\",\"82\",\"Call-Clear-Request\"\r\n\"22\",\"31.032941\",\"172.30.0.2\",\"172.10.0.2\",\"TCP\",\"66\",\"33730 > 1723 [FIN, ACK]\r\n\"23\",\"31.032999\",\"172.10.0.2\",\"172.30.0.2\",\"TCP\",\"66\",\"1723 > 33730 [FIN, ACK]\r\n\"24\",\"31.033008\",\"172.30.0.2\",\"172.10.0.2\",\"TCP\",\"66\",\"33730 > 1723 [ACK]<\/pre>\r\n\r\n\r\n2.2 PCAP del lado del servidor en el esquema con interfaces f\u00edsicas (pptp_w_810_server.pcap):\r\n\r\n<pre>\"No.\",\"Time\",\"Source\",\"Destination\",\"Protocol\",\"Length\",\"Info\"\r\n\"1\",\"0.000000\",\"172.30.0.2\",\"172.10.0.2\",\"TCP\",\"74\",\"33730 > 1723 [SYN]\r\n\"2\",\"0.000026\",\"172.10.0.2\",\"172.30.0.2\",\"TCP\",\"74\",\"1723 > 33730 [SYN, ACK]\r\n\"3\",\"0.000069\",\"172.30.0.2\",\"172.10.0.2\",\"TCP\",\"66\",\"33730 > 1723 [ACK]\r\n\"4\",\"0.000290\",\"172.30.0.2\",\"172.10.0.2\",\"PPTP\",\"222\",\"Start-Control-Connection-Request\"\r\n\"5\",\"0.000298\",\"172.10.0.2\",\"172.30.0.2\",\"TCP\",\"66\",\"1723 > 33730 [ACK]\r\n\"6\",\"0.001014\",\"172.10.0.2\",\"172.30.0.2\",\"PPTP\",\"222\",\"Start-Control-Connection-Reply\"\r\n\"7\",\"0.001047\",\"172.30.0.2\",\"172.10.0.2\",\"TCP\",\"66\",\"33730 > 1723 [ACK]\r\n\"8\",\"1.000598\",\"172.30.0.2\",\"172.10.0.2\",\"PPTP\",\"234\",\"Outgoing-Call-Request\"\r\n\"9\",\"1.001134\",\"172.10.0.2\",\"172.30.0.2\",\"PPTP\",\"98\",\"Outgoing-Call-Reply\"\r\n\"10\",\"1.001189\",\"172.30.0.2\",\"172.10.0.2\",\"TCP\",\"66\",\"33730 > 1723 [ACK]\r\n\"11\",\"1.004629\",\"172.10.0.2\",\"172.30.0.2\",\"PPP LCP\",\"70\",\"Configuration Request\"\r\n\"12\",\"4.007764\",\"172.10.0.2\",\"172.30.0.2\",\"PPP LCP\",\"70\",\"Configuration Request\"\r\n\"13\",\"7.010842\",\"172.10.0.2\",\"172.30.0.2\",\"PPP LCP\",\"70\",\"Configuration Request\"\r\n\"14\",\"10.013949\",\"172.10.0.2\",\"172.30.0.2\",\"PPP LCP\",\"70\",\"Configuration Request\"\r\n\"15\",\"13.017035\",\"172.10.0.2\",\"172.30.0.2\",\"PPP LCP\",\"70\",\"Configuration Request\"\r\n\"16\",\"16.020115\",\"172.10.0.2\",\"172.30.0.2\",\"PPP LCP\",\"70\",\"Configuration Request\"\r\n\"17\",\"19.023193\",\"172.10.0.2\",\"172.30.0.2\",\"PPP LCP\",\"70\",\"Configuration Request\"\r\n\"18\",\"22.026271\",\"172.10.0.2\",\"172.30.0.2\",\"PPP LCP\",\"70\",\"Configuration Request\"\r\n\"19\",\"25.029348\",\"172.10.0.2\",\"172.30.0.2\",\"PPP LCP\",\"70\",\"Configuration Request\"\r\n\"20\",\"28.030753\",\"172.10.0.2\",\"172.30.0.2\",\"PPP LCP\",\"70\",\"Configuration Request\"\r\n\"21\",\"31.032901\",\"172.30.0.2\",\"172.10.0.2\",\"PPTP\",\"82\",\"Call-Clear-Request\"\r\n\"22\",\"31.032938\",\"172.30.0.2\",\"172.10.0.2\",\"TCP\",\"66\",\"33730 > 1723 [FIN, ACK]\r\n\"23\",\"31.032972\",\"172.10.0.2\",\"172.30.0.2\",\"TCP\",\"66\",\"1723 > 33730 [FIN, ACK]\r\n\"24\",\"31.032996\",\"172.30.0.2\",\"172.10.0.2\",\"TCP\",\"66\",\"33730 > 1723 [ACK]\r\n<\/pre>\r\n\r\n\r\n<h2>An\u00e1lisis<\/h2>\r\nDesde el PCAP eliminado en el esquema con interfaces virtuales en el lado del cliente (pptp_w_veth.pcap), se puede ver que la conexi\u00f3n PPTP es exitosa.\r\n\r\nEn el esquema sobre interfaces f\u00edsicas (pptp_w_810_server\/client.pcap), ocurre un error durante el proceso de conexi\u00f3n al momento de la transmisi\u00f3n de paquetes LCP que son encapsulados por GRE. El cliente y el servidor env\u00edan un paquete LCP (Configure-Request) pero no los reciben.\r\n\r\n<h2>Conclusiones<\/h2>\r\n\r\nLas pruebas han demostrado que la tarjeta Intel Ethernet E810 de 100 GbE no descarta paquetes GRE al intentar una conexi\u00f3n PPTP.\r\n\r\nCreemos que esta informaci\u00f3n ser\u00e1 \u00fatil para la comunidad de ISP y lo ayudar\u00e1 a elegir el equipo de red adecuado. Esperamos que Intel preste atenci\u00f3n a este problema, pueda solucionarlo y mejorar la calidad de los servicios.\r\n\r\n<em>   <strong>  Los autores:   <\/strong>  \r\nDmitry Moldavanov, CTO\r\nKirill Marchenko, Ingeniero de redes<\/em>\r\n\r\n[subscription id=\u00bb11987\u2033]Suscr\u00edbase a nuestro bolet\u00edn y mant\u00e9ngase actualizado sobre los \u00faltimos avances y ofertas especiales.[\/subscription]","protected":false},"excerpt":{"rendered":"<p>En este art\u00edculo, revelamos el proceso de ensayo una conexi\u00f3n PPTP en interfaces virtuales y f\u00edsicas utilizando una tarjeta de red Intel Ethernet E810-C 100GbE.<\/p>\n","protected":false},"author":7,"featured_media":7380,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[48],"tags":[],"class_list":["post-7334","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-telecom"],"yoast_head":"<!-- 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