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@Author <Su Zhihua/A0195041L> Date : 05/09/2019 ################################################ Policy 1 ################################################ The policy is configured to when "eth_type" is "0x0800"(TYPE_IPv4) and "ip_proto" is "0x11"(UDP) and the port is within the range of 1000 ~ 1100, the package will be dropped (actions do nothing). Since we cannot do range match for port, if we create one rule for every port, there will be 100 rules. So I come out with the bit mask way. It contains 6 rules (0x03e8/0xfff8 for port 1000 ~ 1007, 0x03f0/0xfff0 for port 1008 ~ 1023, 0x0400/0xffc0 for port 1024 ~ 1087, 0x0440/0xfff8 for port 1088 ~ 1095, 0x0448/0xfffc for port 1096 ~ 1099 and port 1100). Below shows some iperf3 logs from S2 to S3. The logs from S3 to S2 is similar. For port 999, which is outside the blocking range, the traffic can pass: Connecting to host 10.0.0.3, port 999 [ 20] local 10.0.0.2 port 38310 connected to 10.0.0.3 port 999 [ ID] Interval Transfer Bandwidth Total Datagrams [ 20] 0.00-1.00 sec 120 KBytes 981 Kbits/sec 15 [ 20] 1.00-2.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 20] 2.00-3.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 20] 3.00-4.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 20] 4.00-5.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 20] 5.00-6.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 20] 6.00-7.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 20] 7.00-8.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 20] 8.00-9.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 20] 9.00-10.00 sec 128 KBytes 1.05 Mbits/sec 16 - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams [ 20] 0.00-10.00 sec 1.24 MBytes 1.04 Mbits/sec 0.843 ms 0/159 (0%) [ 20] Sent 159 datagrams iperf Done. For port 1101, the traffic can pass: Connecting to host 10.0.0.3, port 1101 [ 20] local 10.0.0.2 port 58673 connected to 10.0.0.3 port 1101 [ ID] Interval Transfer Bandwidth Total Datagrams [ 20] 0.00-1.00 sec 120 KBytes 981 Kbits/sec 15 [ 20] 1.00-2.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 20] 2.00-3.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 20] 3.00-4.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 20] 4.00-5.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 20] 5.00-6.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 20] 6.00-7.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 20] 7.00-8.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 20] 8.00-9.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 20] 9.00-10.00 sec 128 KBytes 1.05 Mbits/sec 16 - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams [ 20] 0.00-10.00 sec 1.24 MBytes 1.04 Mbits/sec 0.918 ms 0/159 (0%) [ 20] Sent 159 datagrams iperf Done. For port less than 1000 or greater than 1100, the logs are similar to above logs, which can all pass. For port 1000, the traffic is blocked: Connecting to host 10.0.0.3, port 1000 - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams For port 1050, the traffic is blocked: Connecting to host 10.0.0.3, port 1050 - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams For port 1100, the traffic is blocked: Connecting to host 10.0.0.3, port 1100 - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams For port within the range of 1000 to 1100, the logs are similar to above los, which are all blocked. ################################################ Policy 2 ################################################ The policy is configured that for all the traffic from H1 to H2, it will put into queue @1, which is rate limited to 1Mbps. The logs are shown below. H1 as sender. It sends at about 1.04Mbps. Connecting to host 10.0.0.2, port 1000 [ 20] local 10.0.0.1 port 42683 connected to 10.0.0.2 port 1000 [ ID] Interval Transfer Bandwidth Total Datagrams [ 20] 0.00-1.00 sec 120 KBytes 983 Kbits/sec 15 [ 20] 1.00-2.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 20] 2.00-3.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 20] 3.00-4.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 20] 4.00-5.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 20] 5.00-6.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 20] 6.00-7.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 20] 7.00-8.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 20] 8.00-9.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 20] 9.00-10.00 sec 128 KBytes 1.05 Mbits/sec 16 - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams [ 20] 0.00-10.00 sec 1.24 MBytes 1.04 Mbits/sec 46.543 ms 0/159 (0%) [ 20] Sent 159 datagrams iperf Done. H2 as receiver. It receives at only about 990Kbps. ----------------------------------------------------------- Server listening on 1000 ----------------------------------------------------------- Accepted connection from 10.0.0.1, port 33022 [ 21] local 10.0.0.2 port 1000 connected to 10.0.0.1 port 42683 [ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams [ 21] 0.00-1.00 sec 112 KBytes 917 Kbits/sec 24.144 ms 0/14 (0%) [ 21] 1.00-2.00 sec 120 KBytes 983 Kbits/sec 37.940 ms 0/15 (0%) [ 21] 2.00-3.00 sec 128 KBytes 1.05 Mbits/sec 43.227 ms 0/16 (0%) [ 21] 3.00-4.00 sec 120 KBytes 983 Kbits/sec 45.641 ms 0/15 (0%) [ 21] 4.00-5.00 sec 120 KBytes 982 Kbits/sec 45.017 ms 0/15 (0%) [ 21] 5.00-6.00 sec 128 KBytes 1.05 Mbits/sec 45.318 ms 0/16 (0%) [ 21] 6.00-7.00 sec 120 KBytes 983 Kbits/sec 46.165 ms 0/15 (0%) [ 21] 7.00-8.00 sec 120 KBytes 984 Kbits/sec 46.994 ms 0/15 (0%) [ 21] 8.00-9.00 sec 120 KBytes 983 Kbits/sec 45.706 ms 0/15 (0%) [ 21] 9.00-10.00 sec 128 KBytes 1.05 Mbits/sec 45.831 ms 0/16 (0%) [ 21] 10.00-10.52 sec 56.0 KBytes 882 Kbits/sec 46.543 ms 0/7 (0%) - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams [ 21] 0.00-10.52 sec 1.24 MBytes 990 Kbits/sec 46.543 ms 0/159 (0%) ----------------------------------------------------------- Server listening on 1000 ----------------------------------------------------------- Now switch sender and receiver. H2 as sender. It sends at about 1.04Mbps Connecting to host 10.0.0.1, port 1000 [ 20] local 10.0.0.2 port 33564 connected to 10.0.0.1 port 1000 [ ID] Interval Transfer Bandwidth Total Datagrams [ 20] 0.00-1.00 sec 120 KBytes 982 Kbits/sec 15 [ 20] 1.00-2.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 20] 2.00-3.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 20] 3.00-4.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 20] 4.00-5.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 20] 5.00-6.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 20] 6.00-7.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 20] 7.00-8.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 20] 8.00-9.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 20] 9.00-10.00 sec 128 KBytes 1.05 Mbits/sec 16 - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams [ 20] 0.00-10.00 sec 1.24 MBytes 1.04 Mbits/sec 0.055 ms 0/159 (0%) [ 20] Sent 159 datagrams iperf Done. H1 as receiver. It receives at also about 1.04Mbps since H2 to H1 is not rate limited. ----------------------------------------------------------- Server listening on 1000 ----------------------------------------------------------- Accepted connection from 10.0.0.2, port 57034 [ 21] local 10.0.0.1 port 1000 connected to 10.0.0.2 port 33564 [ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams [ 21] 0.00-1.00 sec 120 KBytes 983 Kbits/sec 0.064 ms 0/15 (0%) [ 21] 1.00-2.00 sec 128 KBytes 1.05 Mbits/sec 0.065 ms 0/16 (0%) [ 21] 2.00-3.00 sec 128 KBytes 1.05 Mbits/sec 0.063 ms 0/16 (0%) [ 21] 3.00-4.00 sec 128 KBytes 1.05 Mbits/sec 0.063 ms 0/16 (0%) [ 21] 4.00-5.00 sec 128 KBytes 1.05 Mbits/sec 0.077 ms 0/16 (0%) [ 21] 5.00-6.00 sec 128 KBytes 1.05 Mbits/sec 0.063 ms 0/16 (0%) [ 21] 6.00-7.00 sec 128 KBytes 1.05 Mbits/sec 0.058 ms 0/16 (0%) [ 21] 7.00-8.00 sec 128 KBytes 1.05 Mbits/sec 0.055 ms 0/16 (0%) [ 21] 8.00-9.00 sec 128 KBytes 1.05 Mbits/sec 0.050 ms 0/16 (0%) [ 21] 9.00-10.00 sec 128 KBytes 1.05 Mbits/sec 0.055 ms 0/16 (0%) [ 21] 10.00-10.04 sec 0.00 Bytes 0.00 bits/sec 0.055 ms 0/0 (-nan%) - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams [ 21] 0.00-10.04 sec 1.24 MBytes 1.04 Mbits/sec 0.055 ms 0/159 (0%) ----------------------------------------------------------- Server listening on 1000 ----------------------------------------------------------- ################################################ Policy 3 ################################################ The policy is set inside a while loop. Inside the while loop, the code will query the switch, if the byte count of the policy reaches the limit, it will send a policy to the switch to change the policy and increase the limit. The difference of the two policy is inside the action. They will use different queue @1 and @2 to apply different rate limit. Between every query, we will set appropriate sleep time according the remaining bit count and rate limit, so that we don't send too many query to the switch and make the system unresponsible. Below shows the log: ----------------------------------------------------------- Server listening on 80 ----------------------------------------------------------- Accepted connection from 10.0.0.1, port 34326 [ 21] local 10.0.0.3 port 80 connected to 10.0.0.1 port 34328 [ ID] Interval Transfer Bandwidth [ 21] 0.00-1.04 sec 102 KBytes 800 Kbits/sec [ 21] 1.04-2.00 sec 102 KBytes 871 Kbits/sec [ 21] 2.00-3.00 sec 116 KBytes 951 Kbits/sec [ 21] 3.00-4.00 sec 117 KBytes 961 Kbits/sec [ 21] 4.00-5.01 sec 113 KBytes 917 Kbits/sec [ 21] 5.01-6.03 sec 113 KBytes 910 Kbits/sec [ 21] 6.03-7.01 sec 113 KBytes 949 Kbits/sec [ 21] 7.01-8.01 sec 115 KBytes 938 Kbits/sec [ 21] 8.01-9.00 sec 116 KBytes 956 Kbits/sec [ 21] 9.00-10.00 sec 113 KBytes 927 Kbits/sec [ 21] 10.00-11.01 sec 116 KBytes 941 Kbits/sec [ 21] 11.01-12.02 sec 110 KBytes 896 Kbits/sec [ 21] 12.02-13.03 sec 106 KBytes 857 Kbits/sec [ 21] 13.03-14.00 sec 105 KBytes 884 Kbits/sec [ 21] 14.00-15.01 sec 107 KBytes 873 Kbits/sec [ 21] 15.01-16.02 sec 117 KBytes 956 Kbits/sec [ 21] 16.02-17.02 sec 116 KBytes 947 Kbits/sec [ 21] 17.02-18.00 sec 113 KBytes 944 Kbits/sec [ 21] 18.00-19.02 sec 119 KBytes 957 Kbits/sec [ 21] 19.02-20.03 sec 116 KBytes 941 Kbits/sec [ 21] 20.03-21.01 sec 115 KBytes 959 Kbits/sec [ 21] 21.01-22.00 sec 113 KBytes 928 Kbits/sec [ 21] 22.00-23.01 sec 116 KBytes 941 Kbits/sec [ 21] 23.01-24.00 sec 113 KBytes 940 Kbits/sec [ 21] 24.00-25.00 sec 116 KBytes 950 Kbits/sec [ 21] 25.00-26.00 sec 112 KBytes 915 Kbits/sec [ 21] 26.00-27.04 sec 99.0 KBytes 778 Kbits/sec [ 21] 27.04-28.00 sec 49.5 KBytes 423 Kbits/sec [ 21] 28.00-29.03 sec 39.6 KBytes 315 Kbits/sec [ 21] 29.03-30.02 sec 35.4 KBytes 293 Kbits/sec [ 21] 30.02-31.01 sec 35.4 KBytes 292 Kbits/sec [ 21] 31.01-32.00 sec 36.8 KBytes 303 Kbits/sec [ 21] 32.00-33.00 sec 38.2 KBytes 314 Kbits/sec [ 21] 33.00-34.00 sec 36.8 KBytes 301 Kbits/sec [ 21] 34.00-35.00 sec 35.4 KBytes 289 Kbits/sec [ 21] 35.00-36.00 sec 39.6 KBytes 325 Kbits/sec [ 21] 36.00-37.00 sec 41.0 KBytes 336 Kbits/sec [ 21] 37.00-38.00 sec 38.2 KBytes 313 Kbits/sec [ 21] 38.00-39.00 sec 39.6 KBytes 324 Kbits/sec [ 21] 39.00-40.00 sec 38.2 KBytes 313 Kbits/sec [ 21] 40.00-41.00 sec 38.2 KBytes 313 Kbits/sec [ 21] 41.00-42.00 sec 39.6 KBytes 324 Kbits/sec [ 21] 42.00-43.00 sec 41.0 KBytes 336 Kbits/sec [ 21] 43.00-44.00 sec 39.6 KBytes 324 Kbits/sec [ 21] 44.00-45.00 sec 38.2 KBytes 313 Kbits/sec [ 21] 45.00-46.01 sec 38.2 KBytes 311 Kbits/sec [ 21] 46.01-47.00 sec 39.6 KBytes 325 Kbits/sec [ 21] 47.00-48.02 sec 41.0 KBytes 330 Kbits/sec [ 21] 48.02-49.01 sec 39.6 KBytes 330 Kbits/sec [ 21] 49.01-50.01 sec 38.2 KBytes 313 Kbits/sec [ 21] 50.01-51.01 sec 66.5 KBytes 542 Kbits/sec [ 21] 51.01-52.01 sec 62.2 KBytes 512 Kbits/sec [ 21] 52.01-53.00 sec 69.3 KBytes 571 Kbits/sec [ 21] 53.00-54.01 sec 72.1 KBytes 587 Kbits/sec [ 21] 54.01-55.01 sec 67.9 KBytes 552 Kbits/sec [ 21] 55.01-56.00 sec 73.5 KBytes 608 Kbits/sec [ 21] 56.00-57.00 sec 550 KBytes 4.53 Mbits/sec [ 21] 57.00-58.01 sec 100 KBytes 817 Kbits/sec [ 21] 58.01-59.03 sec 110 KBytes 883 Kbits/sec [ 21] 59.03-60.01 sec 110 KBytes 925 Kbits/sec [ 21] 60.01-61.00 sec 109 KBytes 897 Kbits/sec [ 21] 61.00-62.00 sec 107 KBytes 880 Kbits/sec [ 21] 62.00-63.02 sec 112 KBytes 900 Kbits/sec [ 21] 63.02-64.03 sec 102 KBytes 825 Kbits/sec [ 21] 64.03-65.03 sec 102 KBytes 832 Kbits/sec [ 21] 65.03-66.03 sec 100 KBytes 823 Kbits/sec [ 21] 66.03-67.02 sec 105 KBytes 868 Kbits/sec [ 21] 67.02-68.03 sec 103 KBytes 833 Kbits/sec [ 21] 68.03-69.00 sec 102 KBytes 860 Kbits/sec [ 21] 69.00-70.02 sec 113 KBytes 911 Kbits/sec [ 21] 70.02-71.01 sec 113 KBytes 936 Kbits/sec [ 21] 71.01-72.03 sec 113 KBytes 908 Kbits/sec [ 21] 72.03-73.01 sec 110 KBytes 926 Kbits/sec [ 21] 73.01-74.00 sec 110 KBytes 905 Kbits/sec [ 21] 74.00-75.01 sec 103 KBytes 844 Kbits/sec [ 21] 75.01-76.01 sec 185 KBytes 1.51 Mbits/sec [ 21] 76.01-77.01 sec 35.4 KBytes 289 Kbits/sec [ 21] 77.01-78.00 sec 39.6 KBytes 328 Kbits/sec [ 21] 78.00-79.00 sec 38.2 KBytes 313 Kbits/sec [ 21] 79.00-80.04 sec 41.0 KBytes 324 Kbits/sec [ 21] 80.04-81.02 sec 38.2 KBytes 319 Kbits/sec [ 21] 81.02-82.03 sec 38.2 KBytes 308 Kbits/sec [ 21] 82.03-83.01 sec 35.4 KBytes 295 Kbits/sec [ 21] 83.01-84.00 sec 41.0 KBytes 341 Kbits/sec [ 21] 84.00-85.00 sec 36.8 KBytes 301 Kbits/sec [ 21] 85.00-86.02 sec 39.6 KBytes 320 Kbits/sec [ 21] 86.02-87.06 sec 41.0 KBytes 321 Kbits/sec [ 21] 87.06-88.06 sec 29.7 KBytes 243 Kbits/sec [ 21] 88.06-89.00 sec 33.9 KBytes 297 Kbits/sec [ 21] 89.00-90.00 sec 33.9 KBytes 277 Kbits/sec [ 21] 90.00-91.01 sec 36.8 KBytes 300 Kbits/sec [ 21] 91.01-92.04 sec 42.4 KBytes 335 Kbits/sec [ 21] 92.04-93.00 sec 35.4 KBytes 302 Kbits/sec [ 21] 93.00-94.00 sec 38.2 KBytes 313 Kbits/sec [ 21] 94.00-95.00 sec 42.4 KBytes 347 Kbits/sec [ 21] 95.00-96.00 sec 36.8 KBytes 301 Kbits/sec [ 21] 96.00-97.00 sec 65.0 KBytes 533 Kbits/sec [ 21] 97.00-98.00 sec 546 KBytes 4.47 Mbits/sec [ 21] 98.00-99.00 sec 77.8 KBytes 637 Kbits/sec [ 21] 99.00-100.00 sec 77.8 KBytes 638 Kbits/sec [ 21] 100.00-101.00 sec 77.8 KBytes 637 Kbits/sec [ 21] 101.00-102.00 sec 76.4 KBytes 625 Kbits/sec [ 21] 102.00-103.00 sec 77.8 KBytes 637 Kbits/sec [ 21] 103.00-104.00 sec 77.8 KBytes 635 Kbits/sec [ 21] 104.00-105.00 sec 76.4 KBytes 627 Kbits/sec [ 21] 105.00-106.00 sec 76.4 KBytes 625 Kbits/sec [ 21] 106.00-107.00 sec 77.8 KBytes 638 Kbits/sec [ 21] 107.00-108.00 sec 77.8 KBytes 637 Kbits/sec [ 21] 108.00-109.00 sec 77.8 KBytes 637 Kbits/sec [ 21] 109.00-110.00 sec 76.4 KBytes 626 Kbits/sec [ 21] 110.00-111.00 sec 77.8 KBytes 637 Kbits/sec [ 21] 111.00-112.00 sec 93.3 KBytes 765 Kbits/sec [ 21] 112.00-113.00 sec 117 KBytes 961 Kbits/sec [ 21] 113.00-114.00 sec 116 KBytes 951 Kbits/sec [ 21] 114.00-115.00 sec 120 KBytes 984 Kbits/sec [ 21] 115.00-116.00 sec 116 KBytes 950 Kbits/sec [ 21] 116.00-117.00 sec 116 KBytes 950 Kbits/sec [ 21] 117.00-118.00 sec 119 KBytes 973 Kbits/sec [ 21] 118.00-119.00 sec 116 KBytes 949 Kbits/sec [ 21] 119.00-120.00 sec 116 KBytes 951 Kbits/sec [ 21] 120.00-121.00 sec 116 KBytes 950 Kbits/sec [ 21] 121.00-122.00 sec 117 KBytes 962 Kbits/sec [ 21] 122.00-123.00 sec 116 KBytes 950 Kbits/sec [ 21] 123.00-124.00 sec 117 KBytes 961 Kbits/sec [ 21] 124.00-125.03 sec 287 KBytes 2.29 Mbits/sec [ 21] 125.03-126.00 sec 36.8 KBytes 309 Kbits/sec [ 21] 126.00-127.00 sec 41.0 KBytes 336 Kbits/sec [ 21] 127.00-128.00 sec 39.6 KBytes 324 Kbits/sec [ 21] 128.00-129.00 sec 38.2 KBytes 314 Kbits/sec [ 21] 129.00-130.00 sec 41.0 KBytes 336 Kbits/sec [ 21] 130.00-131.00 sec 39.6 KBytes 324 Kbits/sec [ 21] 131.00-132.01 sec 38.2 KBytes 311 Kbits/sec [ 21] 132.01-133.00 sec 41.0 KBytes 338 Kbits/sec [ 21] 133.00-134.00 sec 39.6 KBytes 324 Kbits/sec [ 21] 134.00-135.00 sec 358 KBytes 2.93 Mbits/sec [ 21] 135.00-136.00 sec 59.4 KBytes 486 Kbits/sec [ 21] 136.00-137.00 sec 59.4 KBytes 486 Kbits/sec [ 21] 137.00-138.01 sec 59.4 KBytes 483 Kbits/sec [ 21] 138.01-139.03 sec 59.4 KBytes 475 Kbits/sec [ 21] 139.03-140.03 sec 59.4 KBytes 488 Kbits/sec [ 21] 140.03-141.01 sec 59.4 KBytes 498 Kbits/sec [ 21] 141.01-142.00 sec 56.6 KBytes 467 Kbits/sec [ 21] 142.00-142.92 sec 55.1 KBytes 492 Kbits/sec - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth Retr [ 21] 0.00-142.92 sec 19.5 MBytes 1.15 Mbits/sec 2227 sender [ 21] 0.00-142.92 sec 12.0 MBytes 707 Kbits/sec receiver ----------------------------------------------------------- Server listening on 80 -----------------------------------------------------------
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