Is there any body faced with an attack like that befure :
03:48:13.180659 IP 61.222.68.47.45941 > 178.20.231.250.80: Flags [S], seq 1534189947, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.180688 IP 0.42.240.108.14914 > 178.20.231.250.80: Flags [S], seq 3471670553, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.180701 IP 149.20.5.114.7000 > 178.20.231.250.80: Flags [S], seq 1408038190, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.180721 IP 45.217.187.20.61553 > 178.20.231.250.80: Flags [S], seq 4072083542, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.180753 IP 105.63.126.51.29587 > 178.20.231.250.80: Flags [S], seq 2707506253, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.180781 IP 213.42.133.94.6839 > 178.20.231.250.80: Flags [S], seq 3176463954, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.180816 IP 17.125.150.64.54602 > 178.20.231.250.80: Flags [S], seq 3250646339, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.180845 IP 29.21.40.101.15199 > 178.20.231.250.80: Flags [S], seq 2197526060, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.180870 IP 75.163.81.100.49546 > 178.20.231.250.80: Flags [S], seq 670367868, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.180908 IP 189.136.224.98.57069 > 178.20.231.250.80: Flags [S], seq 2461090845, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.180934 IP 186.145.71.35.20849 > 178.20.231.250.80: Flags [S], seq 2745581065, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.180964 IP 99.143.109.49.5047 > 178.20.231.250.80: Flags [S], seq 1630709508, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.180990 IP 171.183.52.22.29748 > 178.20.231.250.80: Flags [S], seq 1443038244, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.181012 IP 195.140.169.89.32774 > 178.20.231.250.80: Flags [S], seq 1874807642, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.181039 IP 61.190.196.92.41941 > 178.20.231.250.80: Flags [S], seq 697539946, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.181048 IP 180.133.136.11.20686 > 178.20.231.250.80: Flags [S], seq 2167291504, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.181088 IP 38.141.102.63.13242 > 178.20.231.250.80: Flags [S], seq 1696980280, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.181116 IP 136.105.160.4.25554 > 178.20.231.250.80: Flags [S], seq 397293925, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.181135 IP 185.29.121.54.52210 > 178.20.231.250.80: Flags [S], seq 2767532649, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.181161 IP 138.136.135.37.18192 > 178.20.231.250.80: Flags [S], seq 3107938625, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.181192 IP 91.154.119.67.45867 > 178.20.231.250.80: Flags [S], seq 3882705690, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.181208 IP 129.97.209.58.9609 > 178.20.231.250.80: Flags [S], seq 3630275411, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.181256 IP 124.16.154.3.53654 > 178.20.231.250.80: Flags [S], seq 3077513796, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.181272 IP 93.30.80.43.52571 > 178.20.231.250.80: Flags [S], seq 3150679893, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.181312 IP 183.191.73.28.5437 > 178.20.231.250.80: Flags [S], seq 805165671, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.181340 IP 215.237.0.113.57794 > 178.20.231.250.80: Flags [S], seq 1919287312, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.181539 IP 208.40.99.77.61926 > 178.20.231.250.80: Flags [S], seq 633093443, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.181553 IP 115.199.36.42.42672 > 178.20.231.250.80: Flags [S], seq 1362458716, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.181582 IP 171.107.80.24.22272 > 178.20.231.250.80: Flags [S], seq 3330966295, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.181597 IP 153.233.3.58.36636 > 178.20.231.250.80: Flags [S], seq 3419733540, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.181631 IP 71.122.126.121.8530 > 178.20.231.250.80: Flags [S], seq 123935776, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.181658 IP 162.206.189.42.17013 > 178.20.231.250.80: Flags [S], seq 31043932, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.181674 IP 198.94.198.105.30307 > 178.20.231.250.80: Flags [S], seq 1575869185, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.181706 IP 105.176.221.71.50775 > 178.20.231.250.80: Flags [S], seq 610078526, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.181735 IP 71.35.116.78.54980 > 178.20.231.250.80: Flags [S], seq 3166786935, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.181760 IP 145.198.152.100.15401 > 178.20.231.250.80: Flags [S], seq 4010103620, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.181787 IP 66.79.237.60.15263 > 178.20.231.250.80: Flags [S], seq 2501701469, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.181803 IP 100.11.158.52.32346 > 178.20.231.250.80: Flags [S], seq 2134957177, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.181841 IP 58.231.235.124.11521 > 178.20.231.250.80: Flags [S], seq 2771362933, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.181869 IP 190.123.83.7.38542 > 178.20.231.250.80: Flags [S], seq 2055573049, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.181902 IP 184.238.15.46.36156 > 178.20.231.250.80: Flags [S], seq 883003474, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.181926 IP 40.26.215.119.62480 > 178.20.231.250.80: Flags [S], seq 3713754632, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.181941 IP 198.177.89.90.6709 > 178.20.231.250.80: Flags [S], seq 3496201574, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.181976 IP 62.192.95.0.9797 > 178.20.231.250.80: Flags [S], seq 1870653786, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.181992 IP 93.239.71.122.12600 > 178.20.231.250.80: Flags [S], seq 684689463, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.182023 IP 23.84.185.89.19660 > 178.20.231.250.80: Flags [S], seq 119671146, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.182048 IP 29.234.101.27.38331 > 178.20.231.250.80: Flags [S], seq 357076285, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.182071 IP 170.238.98.104.60287 > 178.20.231.250.80: Flags [S], seq 327322668, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.182103 IP 41.20.191.92.16778 > 178.20.231.250.80: Flags [S], seq 1388332365, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.182117 IP 161.65.234.13.9327 > 178.20.231.250.80: Flags [S], seq 812260143, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.182158 IP 193.149.195.98.47440 > 178.20.231.250.80: Flags [S], seq 792155155, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.182186 IP 108.240.65.96.33911 > 178.20.231.250.80: Flags [S], seq 1877245551, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.182204 IP 41.58.215.107.48137 > 178.20.231.250.80: Flags [S], seq 2011727730, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.182232 IP 66.177.73.45.19233 > 178.20.231.250.80: Flags [S], seq 366492725, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.182262 IP 215.220.33.22.17198 > 178.20.231.250.80: Flags [S], seq 861948207, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.182291 IP 0.195.76.72.22270 > 178.20.231.250.80: Flags [S], seq 2807404557, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.182305 IP 36.32.242.111.28531 > 178.20.231.250.80: Flags [S], seq 1710305584, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.182509 IP 83.33.195.52.65468 > 178.20.231.250.80: Flags [S], seq 319675187, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.182524 IP 128.238.223.37.29455 > 178.20.231.250.80: Flags [S], seq 2499250501, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.182566 IP 68.160.172.0.49467 > 178.20.231.250.80: Flags [S], seq 1306831655, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.182593 IP 183.27.188.117.57433 > 178.20.231.250.80: Flags [S], seq 4224144502, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.182609 IP 198.223.158.77.19910 > 178.20.231.250.80: Flags [S], seq 2474946906, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.182631 IP 177.41.67.46.46431 > 178.20.231.250.80: Flags [S], seq 3517591603, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.182659 IP 122.105.37.60.10766 > 178.20.231.250.80: Flags [S], seq 4147248707, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.182674 IP 22.38.245.76.36030 > 178.20.231.250.80: Flags [S], seq 3096178688, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.182698 IP 86.5.81.17.8711 > 178.20.231.250.80: Flags [S], seq 2119743337, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.182722 IP 82.251.114.16.42965 > 178.20.231.250.80: Flags [S], seq 161146484, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.182751 IP 95.55.65.79.17435 > 178.20.231.250.80: Flags [S], seq 2743821343, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.182772 IP 215.116.68.72.42747 > 178.20.231.250.80: Flags [S], seq 2937217026, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.182798 IP 208.8.47.105.42692 > 178.20.231.250.80: Flags [S], seq 1764048128, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.182837 IP 79.112.229.22.27483 > 178.20.231.250.80: Flags [S], seq 2827151720, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.182855 IP 44.195.228.121.17580 > 178.20.231.250.80: Flags [S], seq 371994225, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.182883 IP 39.62.54.119.25600 > 178.20.231.250.80: Flags [S], seq 3552682001, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.182899 IP 170.99.18.124.40683 > 178.20.231.250.80: Flags [S], seq 2200231537, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.182935 IP 137.6.19.86.60614 > 178.20.231.250.80: Flags [S], seq 812811550, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.182962 IP 121.5.154.2.18878 > 178.20.231.250.80: Flags [S], seq 625250163, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.182977 IP 23.54.48.91.64054 > 178.20.231.250.80: Flags [S], seq 2606219371, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.183013 IP 223.14.61.16.10570 > 178.20.231.250.80: Flags [S], seq 3067671060, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.183029 IP 168.174.86.79.38986 > 178.20.231.250.80: Flags [S], seq 1703741821, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.183063 IP 93.179.33.115.42012 > 178.20.231.250.80: Flags [S], seq 2549809758, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.183113 IP 59.153.96.116.45535 > 178.20.231.250.80: Flags [S], seq 3933272835, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.183150 IP 132.169.171.36.33982 > 178.20.231.250.80: Flags [S], seq 1240310901, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.183179 IP 7.7.224.66.22674 > 178.20.231.250.80: Flags [S], seq 3269885474, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.183211 IP 145.50.5.81.38063 > 178.20.231.250.80: Flags [S], seq 1033757213, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.183256 IP 199.17.212.107.59445 > 178.20.231.250.80: Flags [S], seq 954941241, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.183290 IP 183.83.169.116.29221 > 178.20.231.250.80: Flags [S], seq 632662043, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.183314 IP 5.172.61.47.18165 > 178.20.231.250.80: Flags [S], seq 2900704025, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.183337 IP 14.154.195.76.41261 > 178.20.231.250.80: Flags [S], seq 1587091263, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.183528 IP 14.75.242.61.10301 > 178.20.231.250.80: Flags [S], seq 1271736870, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.183554 IP 218.147.76.122.46924 > 178.20.231.250.80: Flags [S], seq 1242230836, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.183569 IP 73.254.220.84.56677 > 178.20.231.250.80: Flags [S], seq 1844393335, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.183605 IP 175.11.190.92.62023 > 178.20.231.250.80: Flags [S], seq 1549649181, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.183620 IP 161.248.56.92.48095 > 178.20.231.250.80: Flags [S], seq 3402179143, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.183649 IP 81.205.48.33.12013 > 178.20.231.250.80: Flags [S], seq 2302722886, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.183682 IP 217.15.7.42.41994 > 178.20.231.250.80: Flags [S], seq 3799389530, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.183706 IP 139.76.167.126.7280 > 178.20.231.250.80: Flags [S], seq 3847050579, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.183729 IP 181.15.109.58.2780 > 178.20.231.250.80: Flags [S], seq 3687628311, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.183756 IP 156.75.178.124.8131 > 178.20.231.250.80: Flags [S], seq 1301615971, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.183781 IP 154.89.37.68.41400 > 178.20.231.250.80: Flags [S], seq 2754945877, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.183806 IP 77.120.117.33.60998 > 178.20.231.250.80: Flags [S], seq 2135120410, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.183843 IP 184.197.170.64.64925 > 178.20.231.250.80: Flags [S], seq 3163308651, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.183859 IP 128.193.111.85.61681 > 178.20.231.250.80: Flags [S], seq 2359812955, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.183887 IP 111.251.209.3.52242 > 178.20.231.250.80: Flags [S], seq 2825859693, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.183902 IP 165.172.84.85.52072 > 178.20.231.250.80: Flags [S], seq 64716892, win 8192, options [mss 1460,nop,nop,sackOK], length 0 03:48:13.183940 IP 66.125.24.13.43159 > 178.20.231.250.80: Flags [S], seq 2827624534, win 8192, options [mss 1460,nop,nop,sackOK], length 0