xywkd

When a client accesses a server's web service, The client sends a message to the network card, The tcp/ip stack is part of the kernel, Therefore, the client information is transferred to the web service in user space through the kernel's TCP protocol, At this time, the destination destination of the client message is on the socket (IP: Port) that the web service is listening for. When a web service needs to respond to a client request, The destination destination of the response message sent by the web service is the client, At this time, The IP and port that the web service listens on becomes the origin instead, As we said, Netfilter is the real firewall, It is part of the kernel, Therefore, if we want the firewall to achieve the goal of "fire prevention", You need to set up checkpoints in the kernel. All incoming and outgoing messages have to pass through these checkpoints. After checking, those that meet the release conditions can be released, while those that meet the blocking conditions need to be blocked. As a result, input checkpoints and output checkpoints appear. These checkpoints are not called "checkpoints" but "chains" in iptables.1. Policy propaganda: 'Difficulty in attending school, high cost of medical treatment and difficulty in obtaining employment have always been the three major livelihood problems. In recent years, the government has taken many measures to solve these three major problems and achieved attentive results. However, due to the lack of sufficient information on this aspect and the lack of comprehensive understanding of relevant policies, many farmers cannot use these policies to safeguard their rights and interests. We hope that through such an opportunity, we can do our best to help our farmers. The main policies to be publicized include 'rural medical insurance', 'old-age insurance', 'family planning subsidy', 'subsidy for benefiting farmers', 'nine-year compulsory education free policy', etc.System.out.println ("Recovered status is:" + origi.getValue ());……此起彼伏的惊叹声在耳边响起，刘邦走上高高在上的秦王宝座，抚mō着秦王御案。　　光棍吴老大一直追求宝乐婶，也希望儿子吴海洋能娶金花，留在城里。哪知海洋在城工作的公司倒闭，决定返乡创业，令吴老大难以接受。劝其不听，气得将“没出息”的儿云影大笑着对郑氏道：嗳哟。