什么是反向代理?| 代理服务器解释
2018年11月10日 17:21

什么是反向代理?

反向代理 是位于Web服务器前面并将客户端(例如Web浏览器)请求转发给这些Web服务器的服务器。通常实现反向代理以帮助提高安全性,性能和可靠性。为了更好地理解反向代理如何工作以及它可以提供的好处,让我们首先定义 代理服务器 是什么。

什么是代理服务器?

转发代理 (通常称为代理, 代理服务器 Web代理 )是位于一组客户端计算机前面的服务器。当这些计算机向Internet上的站点和服务发出请求时,代理服务器会拦截这些请求,然后代表这些客户端(如中间人)与Web服务器进行通信。

例如,让我们将3台计算机命名为典型的转发代理通信:

这是用户的家用电脑
B:这是一个转发代理服务器
C:这是一个网站的原始服务器(存储网站数据的地方)

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UHMn6MQg3zM6dO1theNmyZdmVK1eKFkmS6mf7hp3Z9P82xzLEcuDdQ8URrReDcAPt27evFYYXLVqUXbx4sWiRJKleGNGsCnaWwRVGh+vIINxQBw4cyG655ZY8DN93333Zjz/+WLRIklQfi//fx1ph7s3VW/ORTcvACscrjt29//fS4ojWi0G4wY4cOZJNmTIlD8Nz5szJvv3226JFkqR6SIMw5wpr4DheBmHV2okTJ7I77rgjD8N33nln9uWXXxYtkiT1PoNw5wzCaoTTp09ns2bNysPw9OnTs2PHjhUtkiT1NoNw5wzCaozvv/8+mzdvXh6Gb7311uzQoXr+OlSS1CwG4c4ZhNUo586dyxYsWJCH4Ztuuin7+OOPixZJknqTQbhzBmE1zi+//JItXbo0D8OU3bt3Fy2SJPUeg3DnDMJqpKtXr2aPPvpoKwy/9957RYskSb2lkyDMZcP66kvbqaNfF3N/+vncpX7bXl76enbm9F8vVUodbfQpo+3Z+S8Vc+3YDturQlt/y7G9gTAIq9FWrVrVCsNbt1b/Z5MkqZsNNggTFOnLjTjKIhhWhUyuu0tbVcjkFsW0VQXXuPMdj2XRVnWLY7ZDG9stY/9oq3q+cYORqsBeZhBW4z311FOtMPzGG28UtZIk9YZeDsL0p80gPHIMwrqmZ555phWGN23aVNRK0vDgK+G4ixUf4NzKlfAy67/fn3/4Ms+HN230GcgHuBQMwu0Mwu0MwhqQF154oRWGn3/++aJWkjrDuY98yEfgjQ/bwRQ+0KsCgnrPxYsXs8OHD+eX8hxuBuF2BuF2BmEN2CuvvNIKw+vXry9qJWng+GDlA7zT8FtV+ICuChHqDW+//XY2c+bM1ufLhg0bhjUQG4TbGYTbGYQ1KG+++WbrzeqJJ54oaiWpf3zoxgfwQEqcFlHV1l8xEPemjz76qC0MD2cgNgi3Mwi3Mwhr0LZt29Z6o1q5cmVRK0nV+BDvbwSYD1g+1PnQ5cO56jJS6XnEnDNctZ4oBJ+qy1Spex08eDD/pnHKlCltYZjTJYbKINzOINzOIKyOfPDBB603qkceeST77bffihZJ+gPhta9RYIIxH/ID+TDuC8Ghv1HjqmCh7sHdS7ky0bRp09rC74QJE/JHrmc/HAzC7QzC7QzC6tjevXtbb1yLFy/Ofv7556JFUtMRgtMAEoUAzAf4cI7YEgSqtkUxDHePK1eu5J8bjz/+eDZ58uTW5wdl0qRJ+bXrn3vuuVbdcIwGwyDcziDcziCsIfnkk0+ym2++OX/Tuv/++7OzZ88WLZKaipBbNVLLKQ0jecpCBIpyqQofGh3ctn/Xrl3Zv//972zixImtkEvhNAh+a8L5wdzRFIsWLcrbli9fns8PB4NwO4NwO4Owhoy/2v/1r3/lb1733HNP9t133xUtkpqmrxDMh3bVub/DjQ/3qtHhqnCikXHhwoXs/fffz8NsnOYQZfr06dnTTz+dHThwoOj9JwIxnyWE4eEaDcZgg3B8m1EVWmmL03rKoq0q0PL/graq7fNvtq826vpqIwDTVhVoo63qD0/2j7aB/H9ku3HsDMJSPz7//PPs9ttvz9/o7rrrruyrr74qWiQ1BR+sMdoUhQ/cqtGskRRBJt0PStXImYbHTz/9lG3fvj1btmxZW/ClzJgxI78x06FD/R//L774Ir+e8HAbbBDWnwzC0iAQfgnBvPHddttt2fHjx4sWSU0QX+OmZbRDcKgKw32NkKkzP/zwQ7Zly5ZsyZIlfwm/s2bNys/3PXr0aNF77BiEO2cQlgaJ0yI4PYI3Qn4MMZxfb0nqXnxgEjTjQ5NS9fXxaCuH4bp+mI+Wb775Jr+e/IMPPviX8DtnzpzspZdeyr8h7CYG4c4ZhKUO8BXZAw88kL8x8kM6flAnqb6qRl+75ZxcRoDT/aKM1Sh1rzp16lT22muv5T+ILoff+fPnZ5s3b85Pa+hWBuHONTYIn790JXt+16lswaaj2d0bP21kefLdk9nXZ0f+hx11denS7x+Mixe33iz37NlTtEiqm/hFfJSB/hBntFTtn/p38uTJbNOmTdm8efPagi+FgY7XX389O336dNG7uxmEO9fIIEwInrr2QPZf89+z/F4++/pCcWQ0WNxkg5ttxJsnvyKWVD/l0eBuHHEt72PVL/ubjt91vPjii9ns2bPbgi9l4cKF2VtvvdWTVwUyCHeukUGYkeCqQNjUcuMqv0IbKq4fGW+m3J5ZUm9gVJcrLRAaOdWBK0JwfVIK5//yIUl7fFBSqq692g3i2rBRHBX+w5EjR7KNGze2fuiclqVLl2Zbt27Nzpw5U/TuTQbhzjUyCHNaQFUgbGoZt9BRg+Hw5JNPtt5c+aGFpO4U4ZfwUP7x20BKN1+irBdGrkfDwYMHs/Xr12d33HFHW/ClcPmzHTt2ZOfOnSt6977y627prHAc6+iaQZhTJZqmfAw0PHjjjTdbflwhqbsw+jOU0MCIUTedG1xWPle46u5gdcWPlteuXZvf0CINvjfddFP22GOPZR988MGIXMO3G8Qd2CxDK91wFZiRYBCuYBAeOc8//3zrDfiFF14oaiWNJcLrcISFbv+g5Hmmo9x1Pj2C32js27cvW7NmTevOn1EmTZqUrVq1Ktu9e3d2+fLlYon64nWPWw5bBl/4f8Lt0bv5j9yhMAhXMAiPLEaD4w2Zuw2NJP79cgUQfgBqGVzh/8Gjbx736ik1x4db+W5w6QcgbYykco5tFE5/IPTy4Zj274WbVZQDUZ3OGSXUEm4JuRMnTmwLv4RhQjHh+OrVq8USzcO/UcvgSl0DcDAIVzAIj7w33nij9QbN+cMjgX+7BLr0tbQMvniefH31FYIJwPxAbiAfgPShb6+cP1g+PaLXrx7B6Qyc1sDpDZzmkIZfToPgdAiv5S71zSBcwSA8Ovg1crxhc2WJ4cal79LX0dJ5ee/wD8VRVZ1UnQ7BKC+jQHXFc0ufby+e98gP2fhBGz9sS4MvhR/A8U3bp59+WvRWp/gjr65FfzIIVzAIjx6uLRxv4I8++mjbV3ZDvT0z4S1ew/HL9uTzloEXLh0Yx++Nj78pjqrqonzZM0q33A1uJBEC0ufcrZd7K+MSZgweLF26tC34Urj0GZdA41JoGh59nS5Ul1LXK0B0wiBcwSA8urjrXLyhL1myJL8rHTZs2JDf2ahThLl4Db0e9OCl/w8MwvVTPr+3zj+GKUufdzdfG/Xbb7/Nb2LBzSzS4EuZM2dOfvMLboKh4VX+1qCuxWsq/8EgXMEgPPo+/vjj1vlt3L6Tr/4Iwsy//fbbRa/BMQgPjUG4vsrnyXb7Zc+GG+dAp8+f0b+4QchY47bF3L74/vvvbwu+FG53zOAAtz/WyKr7VSaa9IfvtRiEKxiEx8ahQ4eyyZMnt97w4yYcTzzxRNFjcAzCQ2MQrq/y175Nu7FEf9dK5o+C0T5v+IsvvsivpjN//vy24EshEL/22mvZqVOnit6ShpNBuIJBeOzwNV9c8H3q1Kn54/Lly4vWwTEID41BuJ4YBUpHRJlu2sjQQG4awnEZyT8QPv/88/zUBk5xSIMvhVMhOCWCUyMkjSyDcAWD8OhjRIQfznEaBDfdSC8AbxAeGwbheir/SK4JP5Ar42tvvhomEDMCXD5VIi3Defe5o0ePZs8991z+47Y0+FL4fcSWLVuyH37wCi3SaDIIVzAIjw0Cb/nDgWIQHhsG4Xriurlp0CMY6w8cm/KPCCnUdYrLmHE5sxkzZvzlvY3Ln23fvj376aefit6SRptBuIJBeOzwAzmCbxTOD+70yhGdBGGuPbxg09Firh1t3GmtCtviDnZV+msjYD6/q/rcP+pZtkp/bWxr/4mzxVw72vparswgXE8jeWe1BxYsKKaqjdR5rsO9Xu6eVz59YjBh+MCBA/mNLOI0rygTJkzI39f49uvChQtFb0ljySBcwSBcDwS+eA0HGoQJwfQn9JbFv4uq/xNxB7uqNrbdVxvXN+7rzm39tVFf9ZzYRl/Pl1sl08a+DoRBuJ7KP5Qbzptn/GvKlPyRYEo5fORIfgUY8Djt92C4Z+/efB5MpyE2luGR/jzSJ9YR0uWq1jtc+NFceqz6ugsd1z//6KOP8j/cp/x+DNLwy62OuWHQrl27sl9++aVYQlK3MAhXMAjXw0gFYQJl2UgEYer7auvrORmEdS3lu8mNRBDetHlzHk55vHHChFbAZXrrtm15n0WLF2fr1q/PH6Pun+PH53X0pY7+0SeCb3k5+rIc0+XAPBzKx4vRYvz666/Z7t27s1WrVmWTJk1qC79c/WbNmjXZvn37st9++y3vL6k7GYQrGITrwSDcziAslIPdcJ4akQZhCgioMU04DhFyV6xc2aon0AaWI+yCEEw/gm6EZebnzJ2bt6frHQnpKPoD/+vhbMWKFa3rnkeZNm1a9tRTT+XXRJfUOwzCFQzC9WAQbmcQFso/luvr6/5OpEGYIAtOWagKwjHKGwVpO8sTeJEGYfr0t9xI4eoSccxu+v9uzsPvHXfcka3/fR8PHjxY9JLUa7o+CN//wAPZ5cuXi7nRYRAeG5xjxw/jKFxObagMwu0Mwr0h/X9w+PDhonboGPllNLjqrmrD5VpBmNHcOJeXIEy4pR+nN+BaQRh9LTcS5win0vOFH/jfS4f1tZE0dro+CM+aPXvUf11rEB4bFy9ezO8ox0gL1xEeahg2CLczCPeG9P8BZaiBq+oKCGkhGA+XI0UwTUdrGcWNaR4jFCPCbJzbG8EWfa0DLEfwjeV4ZL0xPxK46chIHDNJY2vQQZg3I/4ip8Rf6+lXXPFXO29KnL9FiTcw/mqnL48sy3S5nfKPcePyNzpEEOYNLtbHcmWxXtrB9qnjPLQYKaCN7fLIfsb2Y1vBIDx2hjMMG4TbGYR7x3CFYUaB+7tZRJSm3WK5U+ml55p2Nz61I0tEdinjD7qR/oaiE5HTQKZiH8k/8Qdk+odokww6CBMgOXgczPhhAwcxQmj6FznTHOQIzNGfZemPqnZEoI0gHP1YlrZ4McGLl4ZjthvLx74hfr0MthX7Gn1D+Rhw+RvL6Baut0kA4NfXnYZhg3C7ToPw/zH3zWzKbTMqXyfLyJb4f9BJGO4rBHM9XE6RoPB1P+GOR11benrEcP7IUL0nDZBl5Azauw05Kb5JIReRiWJAENSl2aopBh2EOVAE0iiBAxmjwWCadg5y9ItAyoGO4MqLUm5HTEcQpn+si5L+5ZKGabD+dD7WxYseqrYVyscgPogso19uvfXW/OLznTAIt+s0CP9fszdVvjaW0S2DubEMo5XlEEwAjkt/qTPp7am9I199kR/IC+Vz2inUR5Aka0SeYZ7+5BG+kY48FGGTb7rTXAKWjeXilCG2xzLUR86JdcT604E+6sD2mGa5COgxz/JsK/qyrZhOpetukkEHYV6MeDE5sODgUU/hheNFYJrHCMTgBUH8w0EahP9+ww35MrTHi5GeGhHLxIsc26LEusE8LzxYfywXdUj7p9MoHwP2xzI65fjx49ni318vPvg5NaLTEAyDcLtOgzCFUyOqXi/LyBXuQNZJCEb5RhCM/mroVjy4qnVM33jqnaJWdUNI5P8gGSMCI5mErBD5gzxBO/klMkZkmDg1NOoi5BKGU+Sjcq6hD9tOQyl1rKPch7rYp9hn6iJT/e3661vbJgvF+niM7aZYD/vbNB39WI6DzMGPg82LGS9Q/BVEGwebFyH+oor+9I0XJ15wsE5eHPrF+l56+eXWVSNiu7ENlot18w8ylk3nKbGuaENf0ygfA40OzouMD/+hhmB0EoS5dTHhsyrsRlvV/wkCdF+hldsy9xU+Wa6vNvaZ9irXaqu6FXSE5L5u91xWDsIaPdyhrNMQXB4N5qoQns86PO7837Nbx3Xi//xXNnv27OyFF17I/4BXPZAp0kGzCLfkmcgqiCBMf4IpWSOCJvkmplmenIMIsCHWSx/WzfroQ86hxDrKy0XWoQ/bj32I5SIjEYQD+8RySPe1rGqkuO46CsIjhRewGxiEx8bbb7+dLVq0KC9DDcHoJAgPxWj+X8FIb88gPDb4tx//D/g/MVjl6wR7OsTwSY/tLf/P5NYfK5S77ror27hxY+vKGepNhNMIr4RTAiYIjlVBmEJbGlTLQTgG48qBNqZZb4RvgijrRLpcTINp+scysc/RJx6pC2wjMhbbpY39pG/sB48G4d+NZRCOv2LGmkG4HkY7CNeNQbg3pXdB47xgDZ/02H5x9Ktsx44d2bJly9oCMSVutPHpp58WS6qXxKgwJcIvoZH6wKgqwZF2wiN9CawxShx5hvAZwbQqMLMcfWLdEayppx1sK9YRWCb9NpvlWY762OcI42D5NBjHttn39Fv2bslho6mrgnC3MAjXg0F4aAzCvSm9AxpXhNDwSE854brMKU7r+uCDD7LHHnus8tbLa9euzT755JOit+qEIBkhlRAZ4bUbXWv/CNFpUG8Kg3AFg3A9GISHxiDcm9Ig7I/khk/6A8T+LjfHb1p2796drVq1Kps0aVJbKOa3D2vWrMn27duXXb16tVhCvSxGjwmRBM3yyG236S/oNjEEwyBcwSBcDwbhoTEI96b0LnLDefvkJmM0OP0DY6DnXf/222956CX8EoLTUMx1ognLhOb4Qbik0WcQrmAQHjvcPOOjjz5qK6N5Qw39ySDcmxgFjsDGV/kauvTc4KH8ccHpEZwmMX369LZQzOkUnFbB6RWcZiFp9BiEKxiExwaBtzxqQuHX850wCA+NQbg3cbvkCG0Ub588NOkpEfxhMVxX4Th48GD+gzp+WFd+z+MHePwQr9u/ZpfqwCBcwSA8+r7//vts3rx52cyZM/PCHeXiQ2E4grBlaMUg3Dv4Gj8NwoS3M6d/LFo1UBzHdHSd0t+5wUPBJde49BqXYEsDMWXp0qXZ1q1bszNnzhS9JQ0ng3AFg/DYeuaZZ9o+CDoNwvzbTV9HS2elrxuMqHuV7yzHecOG4YE7tu/ztnOtKaP1w8Njx47lN+ngZh3p+yBl4cKF+bWlv/vuu6K3pKEyCFcwCI+dZ599tvWmv3r16vyx0yCM/SfO5kEufT0tAy8cO0eDexPXEE6DXIQ5b7BRjRFgbphRDsAUjiXto+3kyZP5nQX5tizeF6M88MAD2euvv56dPn266C2pEwbhCgbhscFXg/Emz6gHd9hieihBODCiaRl8Ue8qX+mgXGhreiH0cuoIpeoYUfjjYSxCcBmXtnrttdey++67r/U+GWX+/PnZ5s2bsy+//LLoLWmgDMIVDMKj7/nnn2+9qb/55pt5HUGYH891etUIqekY/a0a4bRcuxCUu/WHht98803+Pvnggw+2BWLK3Llzs5deein7/PPPi96S+mMQrmAQHl2cDxdv4nzVF4Zy6bSh4N98XYuaia/8q8Ke5a+F0WGOVzeMAg/EDz/8kG3ZsiVbsmRJWyCmzJo1K3vuueeyo0ePFr0llRmEKxiERw8jF/Gmzdd+Y60J5xRzNQ01EwGP6+CmpwQ0ucTpERwTfmDY6+dPnz17Nnv33Xezhx9+uC0QU2bMmJH/BuPQoUNFb0kwCFcwCI8OfgQSb9KvvPJKUTu2Hn3zeNtrX8fiNZWl+rtw4UJ+etny5cuzCRMmtIXi2267LXv66aezAwcOFL2l5jIIVzAIjzx+2BFvygTibsGI8Phle9pe/zoVrwIhNc+lS5eyDz/8MFu5cmV2yy23tIXiKVOmZE8++WS2f//+orfULNfxwZ+WqWsPtH1w8jVquU/dS/kYlNs1NK+++mrrTfjll18uaiVJI+3KlSvZ3r17s8cffzybPHlyWyjmRkZctnLPnj3Zr7/+Wiwh1dt1fE2ahj5L/8WvlYeGH8PFm+6LL75Y1EqSxgIjwYwIT506tS0U33zzzdmKFSvykWRGlKW6uu7Jd09WBj5LdeF4qTNvvPFG602WK0VIkrrHf/7zn2zdunXZ7bff3haKKY8++mj23nvvZefPny96S/VwHecA1/mcyOEsnF/pJag689Zbb7XeULmcjySpex0+fDi/ysTMmTPbAjHloYceyrZt25ZfpaKXcEk8rgxiGVzplUsJdir/sRznvVYFP8ufhRDsZac6w13i4g10w4YNRa0kqRd89tln+U2P7r777rZATFm8eHH2zjvvZN9//33Ru/sQ5LhEXtV1oy0DK1xmsK6BuHXViM++vpAt2HS09tdQHWzheHAVCY6PBo8LvccbJqMLkqTedeLEifxHzvfcc09bIKYsWLAgPwWOO991E64RXRXuLIMrz85/qTii9fKXy6dJw4WvzuINcv369UWtJKkOvvzyy/wa8Pfee29bIKZQxxWCvvrqq6L32ElvM151YxVL3yUNwtyApo4MwhoR3N0o3hC5cLskqb6+/vrrfDSYUeE0EFMYPWYUmdHk/ozULfXTIHxs3+dFrQaC42UQlgZpx44drTfAtWvXFrWSpCb47rvv8t+GLFq0qC0QUzjPmKsGHTt2rOj9p48++ijvw29JLl68WNQOnUG4cwZhaZC4pWe84XFtSklSc/3444/5aXJcaSI+G6LceeedeejlChUhrlLxxBNPFDVDZxDunEFYGoQPPvig9Qa3Zs2aolaSpCw7d+5c/o3hI4880vqsiMK1i7mGcXr7/eG6EoVBuHMGYWmAuPtQvHlx685ecPjIkWzO3LnZosWLi5rRs3XbtmzdGP6AkOfOh9KpU6fyfdmzd28+Deppl6SR8vPPP2c7d+7M717HXezi84Ny00035Y/DNSpsEO6cQVgagN27d7fewFatWlXUdj8CMGE0AuBo2rR5cx7Cx8q06dNbIfgf48ZlK1auzP45fnxrn5gei+MiqXl+/fXXbM+ePfnnxy233NL6PKEMx6iwQbhzBmHpGnjzijeslb+HqV5BAPz7DTfkgY9pRkCZJhTGCDH1TFNPYGaaOkZM6ccyFEIlCJM3TpjQCpn0YzoK86yDZZkvB2HmKek+MFIb+8D6Y530ieXTUE0b+8Qy1IN9ZtnAfPRnmmXAttgOWDb2QZJGGucJl39cx3w3BuHRvrFEp9sbjv00CEv92LdvX+sNi6+3eg0BkCAY0xEcCZkxWkpYjtMEInBSH8E0DYyE1Ai7BGem/3b99a1t8EhQpp71RBgN7EMEVtbPPhBO032IQB6BOPaZ/szHOlmW54H0eYJ1xHLUs48sz3aiX6xfkkZa+iPrCMDDeSm1wQZhAiTX0H156etFzZ/OnP4xb9u+YWdR8yduR0zbgXcPFTV/Yrt9tVHXXxv7zbrLdr/6Ub4c+1QWNxHpq62v5coMwlIf9u/f33rTWr58eVHbW9KASGiMsEmYJChGcA2EQ8JitMc0/SI4Mh8hOfqHCLFgmQitId2f2AZBON0H+rAe0B7rYDkCLf1DPCce2ZfAPsR2eIzAG6E7RJCWpNHA5dNG4lrCgw3ChE76clvmsgiGVXdZi9BaFaAJrbQRQssI1bRVhesItCxfxnZoqwrQ7B9tVc83bjddFa7LDMJShY8//rgVgvn1b69KgyfTEV4JgDEiHCEx0BbBkoAa0/SN0d50XWmwTPvQXhWEqYt1x4hwGoRjudgO64z+BOM0vDJPKI/wHVhHhOl0n5imPwjQ6XYlqVcZhNsZhNt1ZRAmAMTo3EANtr86c+DAgVYIXrZsWVHbmwiEMYJKECRgEgQjJPJvij6pdFSXoBnTsTzhkTraoi4V22C95XVHEGYdsQ/8XygHWeZjOxFgoz/rZB60lUeJkYZcptkuhfXF/yPWV94/SepFBuF2BuF2oxaEIxwMBB/kfDAPBv354B8stpV+4LOedCQsDRZNd/DgwdZlbbg4+tWrV4sWDQf+7ZVD61Dw/y39t5xiW4TsKvw/YrlO/j9JUrcxCLczCLfrNwjzoRwjRDzGhzSPjBilwZa6GAWLeT5o6ceyjHQxH3WU8gdxrJcSQZj1MR/bYpk0mNKGdF/YHvWxv7GOmE+lgSACQHw1HnXxdXGTffrpp61rPS5dujS7cuVK0aLhwh9dVf9GO8G/d/4tl/+PpeL/apX+lpOkXmIQbmcQbtdvEOaDOb6WJWgSZvnwJCgSRiN8xggujxEaWTa+AuZDNT506RfBNkI2InDSnw/wCMLMU+hPHf0475JHlo/t8ch2CBJMsy8RmJmP5WOfQf9YHuxXbIvpwP6k+9o0XNZm4sSJeQhe/Pu/B675KElSLzAItzMItxt0EAaPhMoYvWKasEg9IZn6dNkUATOCaSrCdHma9THNujnfkQDMNMtHSEYE4QiygQAbv+5nPbFesJ/Uh3gO7GP6IyeeRxqMm+To0aPZrbfemofghQsXZr/88kvRIklS9zMItzMIt7tmEI7gSBBMQyNhlbBI+IzzfwmpUdKQWkY4JXSm4bKvIMw26B/rBQGW9vQUhjQIp+tlGdpi+VgH6B/bYRusj2UpEejB82afmuazzz7LJk+enIfgBx98ML8lpiRJvcQg3M4g3K7fIExoZBSWsBijpREeCb+ERfpEiCSExihwX0GYdgrri6AJ1sM62Abrj4BKwCbIsq40iNM3+iCCcLqe2D5tsc/paDF9Y+S3vL/0i+2xbATupjh+/Hg2ZcqUPAQ/8MAD2cWLF4sWSZJ6h0G4nUG4Xb9BOBB0EWEwwi+PqbSOx77CIwG4vGwobwtV22O6v/nyNlhfrDtF2GW0t7w8Ypk0cDfBiRMnsqlTp+Yh+L777svOnz9ftEiS1FsGG4S54xp9hzMIR1t/Qbgq7HYahKOt6vlGSDYI/2FAQbjOCL/pKHEZIbkqQNfVyZMns+m/B39C8L333pv99NNPRYskSb1nsEEYhNO++hJO+2urunUxt22mrSp8RhuPZdQRaqva2A772VdbX8uxD1XBuopBWI3y5ZdfZrfffnsegufNm5edPXu2aJEkqTd1EoT1B4OwGuOrr77K7rjjjjwEz507Nztz5kzRIklS7zIId84grEY4ffp0NnPmzDwEz5kzJ/v++++LFkmSeptBuHMGYdXeN998k9111115CL777ruz7777rmiRJKn3GYQ7ZxBWrX377bfZrFmz8hBMGCYUS5JUJwbhzhmEVVuc/jB79uw8BN95553Z119f+zIqkiT1GoNw5wzCqiV+CMcP4gjBM2bM6PN6z5Ik9bo0CHNJMS4dZhlYiesYG4RVGz/++GN2zz335CGYS6VxyTRJkupq+cQnWmHO0nnhONaRQbhBuDnG/Pnz8xB82223ZV988UXRIklSPcVd3SxDK4wQ15FBuCG4TTK3SyYET5s2Lb+NsiRJTcDd1Li1MLdNtgy+VN3GuS4Mwg1w4cKF7P77789D8NSpU7Pjx48XLZIkSc1lEK65n3/+OVuwYEEegv/1r39lx44dK1okSZKazSBcY7/88ku2cOHCPATfeuut2dGjR4sWSZLUF06l2L5hZ37VhDoWnp/+YBCuqcuXL2eLFi3KQ/CkSZOyw4cPFy2SJKkvP5+7lM367/dX/mCsTuXM6R+LZ9xsBuEaunLlSrZkyZI8BN9yyy3ZoUP1PcldkqThRBCuCo51K95c5A8G4Zq5evVq9tBDD+Uh+KabbsoOHjxYtEiSpIEgJHKViboWTvvQHwzCNfPwww/nIXjChAnZgQMHilpJkiSVGYRr5JFHHslDMOWTTz4paiVJklTFIFwTy5cvb4Xg/fv3F7WSJEnqi0G4Bh577LFWCN63b19RK0mSpP4YhHvcypUrWyF47969Ra0kSZKuxSDcw/7973+3QvDu3buLWkmSJA2EQbhHrV69uhWCd+3aVdRKkiRpoAzCPWjNmjWtELxzp9cClCRJ6oRBuMc88cQTrRD8/vvvF7WSJEkaLINwD3nqqadaIfi9994raiVJktQJg3CPePrpp1shePv27UWtJEmSOmUQ7gHr1q1rheBt27YVtZIkaSz8c/z47Ny5c8Vcu3Xr12eLFi8u5rrH1t/zAwWHjxzJ93Ha9On5/vJcmG4ig3CXe+aZZ1oheOvWrUWtJEkaKXv27s1LYJqwGI8EyQjCPBIwaTt16lReaEfUpetK0a/cFtsIrDu2ka4bsWy0p+gX/Wm/ccKE1v79Y9y4VgCO5VasXJlt2rw5n24Sg3AX27BhQysEv/POO0WtJEkaKXPmzs1DIyOkTEcdo8A8EiRpJ2ASIpkmVP7t+uvzOsJkLPf3G25orYfpVCxLAGV50I95lomAynajH8E11sO2aEO08xjLxbZZN31pA/NVo788r6r6ujMId6mNGze2QvBbb71V1EqSpJFC0IxwmYbOCKiBUEm45PSCGFmNvuUgHKO2TNMvEFjZVozC0hYjtRGGQV06asw8oZU+FPYjlmO7sW2COf3ANuJ0jdjnsvQ5NIlBuAs9//zzrRD85ptvFrWSJGkkpWGQ6QiThMsYaUUEYdoIoWl7OQhH+I0Am2IdBF76x7YJvVHAcrEOxPpjfTHaG8swjzTUsm8R5PsaEQbrbBqDcJd58cUXWyH49ddfL2olSdJoYJSWUVNKBNo06CKCMIX+hMzBBmH6x+hv9I9t09ZXEGaagJ6GWfrEPlQFYeqiP8uzHeZZJkak6ROnTzRJn0H4/KUr2WdfX8j2nzjbyDIWXnrppVYIfvXVV4taSZI0mtJACabLIZZASZCMMEmI5JF+EWIjZCKWCayTdvqm9dQRkGP7sa4U6yqPLrNcbB/l5Qi/6TLl7fA8qk6ZqLvKIPz8rlPZuIU7s/+a/16jy4JNR4sjMvI2bdrUCsGvvPJKUStJkroVo6qER4Ip01WhtVuwb/0FXUai00DeFH8JwoyGVoXCppbRCMME3wjBBGJJktQbCMGEzHQEWb3jL0GY4FcVCJtaGBkfSZwCESGYUyMkSZI0Ov4ShO/e+GlbEHzy3ZP5qRJNKuOX7Wk7BiOFH8NFCOZHcpIkSRo91wzC/GiuacrHYCRwWbQIwVwuTZIkSaPLIFxhpIMwN8iIEPzcc88VtZIkSRpNBuEKIxmEuVVyhGBuoSxJkqSxYRCuMFJBeMuWLa0Q/MwzzxS1kiRJGgsG4QojEYS3bdvWCsHrG3jBakmSpG5jEK4w3EF4+/btrRD89NNPF7WSJEkaSwbhCsMZhHfs2NEKwU899VRRK0mSpLFmEK4wXEH4/fffb4XgJ598sqiVJElSNzAIVxiOILxz585WCF6zZk1RK0mSpG5hEK4w1CD84YcftkLw6tWri1pJkiR1E4NwhaEE4d27d7dC8KpVq4paSZIkdRuDcIVOg/DevXtbIXjlypVFrSRJkrqRQbhCJ0F43759rRD82GOPFbWSJEnqVgbhCoMNwvv372+F4OXLlxe1kiRJ6mYG4QqDCcKffPJJKwQ/8sgjRa0kSZK6nUG4wkCD8IEDB1oh+OGHHy5qJUmS1Au6Pgjv2rUru3z5cjE3OgYShA8ePJjddNNNeQh+6KGHsqtXrxYtkiRJ6gVdH4RnzZ6dXbhwoZgbHdcKwocOHcpuvvnmPAQvWbIku3KleaPmkiRJva6jILxn795s3fr1xVzWmj537ly2afPmfDr6bN22LZ/H4SNH8roVK1fmfcvtsUy0Iw3C0X7q1Kl8PsW6WY520If52B8wHetg/eXnEfoLwocPH84mTpyYh+BFixaN+mi1JEmShseggzBhMgLlosWL8zrCLIVQGcGWIBrhlL74+w03tOr+OX58a5rHtJ3+06ZPz+siCEdfAuycuXPztkAd/ekT66IP0+wPy+HGCRNa+/6PcePyR0q0h76C8NGjR7Nbb701D8ELFy7Mfvnll6JFkiRJvWbQQZjASQCmECZj5JbgGcEYBEyCMfUx6koQBSE5+kY/RDtiOoJwrIvlaGO5kIZdEIDTfYl18Rj7G0Eb5WBdFYSPHTuWTZ48OQ/BCxYsyH7++ee8XpIkSb2poyBcPjUhRmkjXEbQpZ4AG0G33I40CDMiHKJvBOEYia4S2wnMp0E3tpXWpdPXCsLHjx/PpkyZkofgBx54YNTPWZYkSdLwG3QQJrgSIhmBjYDJNPUEXEIlQZTRV9rpO9AgzAgz9ZSoiyAc4TbdLn1iZJjt0RbLxXrYn+iTht90+lpBeNq0aXkIvu+++7Lz588XvSRJktTLOvqxHAizhNOYDlGHOF836tK2qukIp2nbr7/+mpeQbhfpdFVbOt+XdP9RPgaE4Pnz52c//fRT0UOSJEm9ruMgPBLSUdqxVD4G8+bNy86ePVu0SpIkqQ66KgiXR2bHSvkYSJIkqX66Kgh3C4OwJElS/RmEKxiEJUmS6s8gXMEgLEmSVH8G4QoGYUmSpPozCFcwCEuSJNWfQbiCQViSJKn+DMIVDMKSJEn1ZxCuYBCWJEmqP4NwBYOwJElS/RmEKxiEJUmS6s8gXMEgLEmSVH8G4QoGYUmSpPozCFcwCEuSJNWfQbiCQViSJKn+rluw6Wg2de2BVhm/bE9bCEzbmlL6OwaEZEmSJPW+6x5983hb6LP0XwzCkiRJ9XDdZ19fqAx8luqy/8TZ4tBJkiSpl+XnCHN6RFXos7QXRs8lSZJUD60fy3mKRP+F49PEHw5KkiTVVdtVIwh6b3z8Tfb8rlOWonA8OH1EkiRJ9fKXy6dJkiRJTWAQliRJUiMZhCVJktRIBmFJkiQ1kkFYkiRJjWQQliRJUiMZhCVJktRIBmFJkiQ1kkFYkiRJjTRqQXjrtm3Znr17i7n+0Xfa9OnF3MDcOGFCdu7cuWJu4E6dOpVt2ry5mMvy6XXr1xdzf+zL4SNHijlJkiTVRb9BmGAZ4TKdRjkcltvT5UCwjWXSfmUE03IQLq83nac/0v2hvbx/0a9szty5bQH9n+PH5yWwrnRekiRJ9dBvEF6xcmW2aPHifJqRUkIjwZDRV+p5BEGS4BoFLEs787THqCv11NGWBtAInNT/Y9y41npYLtbLsvT7+w035G1M0zeWJexSmKZ/7Dv7zTz15cCchtwI4CyXjhKzT30FaUmSJPWmjoIwQTQNitGPIBmhMQJvGeuglINlLBvTsSx1nKpAHaEXPDJPfexfBGHq2HYg+EZ/6tl2oC22CbbJ8yrXs42BntYhSZKk3jDgIEzAjBBJGGaaQBzT9CVEUqhjPg2kKdbFsoTTkIZfgmhM04/+sW7wyDYJqxFQIwizv/QPtNMWy6fbpC22wz4TmOlL+dv117fCeoR8SZIk1Ue/QZjwRyjkkdBJ+CQwEjRj1JSwSMCMUBqBsa8gTF+WZV1puGS9MdJMWwRUpimsO0Jv9GXfAtPsS7rPsX7mY7uUEOEXPKfYJtJATX1sW5IkSfXQbxAGYTKCL9MRhMunCzAdo8IxXxUeWUf0Y10ptkFbbCukywSm0z7sU6yPafqX26mLUd6QBuhySI510qe8r5IkSept1wzCdRcBvi8E5DSAS5IkqR4aH4QlSZLUTAZhSZIkNZJBWJIkSY1kEJYkSVIjGYQlSZLUSAZhSZIkNZJBWJIkSY1kEJYkSVIjGYQlSZLUSAZhSZIkNZJBWJIkSY1kEJYkSVIjGYQlSZLUSAZhSZIkNZJBWJIkSY1kEJYkSVIjGYQlSZLUSAZhSZIkNZJBWJIkSY1kEJYkSVIjGYQlSZLUSAZhSZIkNZJBWJIkSQ2UZf8/FjajyfwgTY4AAAAASUVORK5CYII=">

在标准的因特网通信中,计算机A将直接到达计算机C,客户端向源服务器发送请求,而源服务器响应客户端。当正向代理到位时,A将代替向B发送请求,B然后将请求转发给C.然后,C将向B发送响应,该响应将响应转发回A.

为什么有人会将这个额外的中间人加入他们的互联网活动?人们可能想要使用转发代理的原因有几个:

避免州或机构浏览限制 - 某些政府,学校和其他组织使用防火墙为其用户提供对有限版本的Internet的访问权限。转发代理可用于解决这些限制,因为它们允许用户连接到代理而不是直接连接到他们正在访问的站点。

阻止访问某些内容 - 相反,也可以设置代理以阻止一组用户访问某些站点。例如,学校网络可能被配置为通过代理连接到Web,该代理启用内容过滤规则,拒绝转发来自Facebook和其他社交媒体站点的响应。

为了保护他们的在线身份 - 在某些情况下,普通互联网用户只是希望在线增加匿名性,但在其他情况下,互联网用户生活在政府可能对持不同政见者造成严重后果的地方。在网络论坛或社交媒体上批评政府可能导致对这些用户的罚款或监禁。如果其中一个持不同政见者使用转发代理连接到他们发布政治敏感评论的网站,用于发布评论的 IP地址 将更难追溯到持不同政见者。只能看到代理服务器的IP地址。

反向代理如何不同?

反向代理是位于一个或多个Web服务器前面的服务器,拦截来自客户端的请求。这与代理位于客户端前面的转发代理不同。使用反向代理,当客户端向网站的源服务器发送请求时,反向代理服务器在网络边缘拦截这些请求。然后,反向代理服务器将向源服务器发送请求并从原始服务器接收响应。

正向和反向代理之间的区别是微妙但重要的。总结起来的一种简化方法是说转发代理位于客户端前面,并确保没有源服务器直接与该特定客户端通信。另一方面,反向代理位于源服务器的前面,并确保没有客户端直接与该源服务器通信。

再一次,让我们通过命名所涉及的计算机来说明:

D:任意数量的用户家用计算机E:这是一个反向代理服务器F:一个或多个源服务器

10.png vpS

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常来自D的所有请求将直接发送到F,而F将直接发送给D.使用反向代理,来自D的所有请求将直接发送到E,并且E将发送其请求并接收来自F的响应。然后将相应的答案传递给D.

下面我们概述了反向代理的一些好处:

负载平衡 - 每天吸引数百万用户的流行网站可能无法使用单个源服务器处理其所有传入站点流量。相反,该站点可以分布在不同服务器池中,所有服务器都处理同一站点的请求。在这种情况下,反向代理可以提供负载平衡解决方案,该解决方案将在不同服务器之间均匀分配传入流量,以防止任何单个服务器过载。如果服务器完全失败,其他服务器可以升级以处理流量。

防止攻击 - 使用反向代理,网站或服务永远不需要显示其原始服务器的IP地址。这使得攻击者更难以利用针对他们的针对性攻击,例如DDoS攻击。相反,攻击者只能定位反向代理,例如Cloudflare的CDN,它将拥有更严格的安全性和更多的资源来抵御网络攻击。

全局服务器负载平衡(GSLB) - 在这种负载平衡形式中,网站可以分布在全球的多个服务器上,反向代理将客户端发送到地理上最接近它们的服务器。这减少了请求和响应所需的距离,从而最大限度地减少了加载时间。

缓存 - 反向代理也可以缓存内容,从而提高性能。例如,如果巴黎的用户在洛杉矶访问带有Web服务器的反向代理网站,则该用户可能实际连接到巴黎的本地反向代理服务器,然后该服务器必须与LA中的源服务器通信。代理服务器然后可以缓存(或临时保存)响应数据。随后浏览该站点的巴黎用户将从Parisian反向代理服务器获得本地缓存版本,从而提高性能。

SSL加密 - 加密和解密每个客户端的SSL(或TLS)通信对于源服务器来说可能是计算上昂贵的。可以将反向代理配置为解密所有传入请求并加密所有传出响应,从而释放源服务器上的宝贵资源。

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