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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"How to exit netfilter block?","articleBody":"I'm running this code:\r\n```from netfilterqueue import NetfilterQueue\r\nimport os, sys\r\n\r\nqueue = NetfilterQueue()\r\nQUEUE_NUM1 = 1\r\n\r\ndef changing_payload(pkt):\r\n    global binary_rep\r\n    if len(binary_rep) == 0:\r\n         raise KeyboardInterrupt\r\n    print(binary_rep)\r\n    binary_rep = binary_rep[1:]\r\n    \r\n\r\nbinary_rep = \"0101000021002220201551051101545\"\r\n\r\ntry:\r\n    os.system(\"iptables -I OUTPUT -d 10.0.1.0/24 -p udp --dport 7078 -j NFQUEUE --queue-num {}\".format(QUEUE_NUM1))\r\n    queue.bind(QUEUE_NUM1, changing_payload)\r\n    queue.run()\r\nexcept KeyboardInterrupt:\r\n    queue.unbind()\r\n    os.system(\"iptables --flush\")\r\n    print('Message sent..')\r\n```\r\n\r\n\r\nand get error message but netfilterqueue que is still running:\r\n```Exception ignored in: 'netfilterqueue.global_callback'\r\nTraceback (most recent call last):\r\n  File \"/home/nfq.py\", line 10, in changing_payload\r\n    raise KeyboardInterrupt(\"Should stop\")\r\nKeyboardInterrupt: Should stop\r\n```\r\nAny ideas how could I stop netfilterqueue without exiting program? (BTW pressing \"CTRL+C\" isn't working too)","author":{"url":"https://github.com/k-zd","@type":"Person","name":"k-zd"},"datePublished":"2021-04-23T14:39:23.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/65/python-netfilterqueue/issues/65"}