请教一个关于网络的问题

手头有台服务器最近一直被攻击，被攻击的时候服务器会直接断网，最奇怪的是局域网内都无法访问，只能拔掉网线再插上才能恢复。 想请教一下这是什么情况，外网无法访问我可以理解，是什么原因造成了局域网也无法访问？

• dmesg

[Fri Apr 14 10:29:11 2023] TCP: request_sock_TCP: Possible SYN flooding on port 2415. Dropping request. Check SNMP counters. [Fri Apr 14 10:29:13 2023] TCP: request_sock_TCP: Possible SYN flooding on port 2416. Dropping request. Check SNMP counters. [Fri Apr 14 10:29:16 2023] TCP: request_sock_TCP: Possible SYN flooding on port 2417. Dropping request. Check SNMP counters. [Fri Apr 14 10:29:18 2023] TCP: request_sock_TCP: Possible SYN flooding on port 2418. Dropping request. Check SNMP counters. [Fri Apr 14 10:29:21 2023] TCP: request_sock_TCP: Possible SYN flooding on port 2419. Dropping request. Check SNMP counters. [Fri Apr 14 10:29:23 2023] TCP: request_sock_TCP: Possible SYN flooding on port 2420. Dropping request. Check SNMP counters. [Fri Apr 14 10:29:26 2023] TCP: request_sock_TCP: Possible SYN flooding on port 2421. Dropping request. Check SNMP counters. [Fri Apr 14 10:29:28 2023] TCP: request_sock_TCP: Possible SYN flooding on port 2422. 

• netstat

Ip: Forwarding: 1 7714599460 total packets received 0 forwarded 0 incoming packets discarded 7714349931 incoming packets delivered 8749439270 requests sent out 47366 outgoing packets dropped 6063 dropped because of missing route 4922 reassemblies required 1017 packets reassembled ok Icmp: 532003 ICMP messages received 11114 input ICMP message failed ICMP input histogram: destination unreachable: 515032 timeout in transit: 16821 echo requests: 138 echo replies: 12 265248 ICMP messages sent 0 ICMP messages failed ICMP output histogram: destination unreachable: 265068 echo requests: 42 echo replies: 138 IcmpMsg: InType0: 12 InType3: 515032 InType8: 138 InType11: 16821 OutType0: 138 OutType3: 265068 OutType8: 42 Tcp: 1686409 active connection openings 1958453 passive connection openings 74282 failed connection attempts 210363 connection resets received 321 connections established 318181058 segments received 358256736 segments sent out 2329101 segments retransmitted 108 bad segments received 423496 resets sent Udp: 7390711649 packets received 1011670 packets to unknown port received 4116888 packet receive errors 8447404689 packets sent 4102479 receive buffer errors 0 send buffer errors InCsumErrors: 14407 IgnoredMulti: 204368 UdpLite: TcpExt: 6 invalid SYN cookies received 1442 resets received for embryonic SYN_RECV sockets 802 ICMP packets dropped because they were out-of-window 1484500 TCP sockets finished time wait in fast timer 6773 time wait sockets recycled by time stamp 1379 packetes rejected in established connections because of timestamp 5473870 delayed acks sent 1978 delayed acks further delayed because of locked socket Quick ack mode was activated 312653 times 592 SYNs to LISTEN sockets dropped 175469000 packet headers predicted 25983181 acknowledgments not containing data payload received 120956447 predicted acknowledgments 49 times recovered from packet loss due to fast retransmit TCPSackRecovery: 70000 TCPSACKReneging: 3 Detected reordering 130693 times using SACK Detected reordering 118 times using reno fast retransmit Detected reordering 140 times using time stamp 409 congestion windows fully recovered without slow start 88 congestion windows partially recovered using Hoe heuristic TCPDSACKUndo: 3108 1052 congestion windows recovered without slow start after partial ack TCPLostRetransmit: 987758 13 timeouts after reno fast retransmit TCPSackFailures: 426 2228 timeouts in loss state 1143021 fast retransmits 27493 retransmits in slow start TCPTimeouts: 1103548 TCPLossProbes: 81461 TCPLossProbeRecovery: 3149 TCPRenoRecoveryFail: 19 TCPSackRecoveryFail: 4040 TCPBacklogCoalesce: 479989 TCPDSACKOldSent: 312029 TCPDSACKOfoSent: 433 TCPDSACKRecv: 299965 TCPDSACKOfoRecv: 40446 283950 connections reset due to unexpected data 12739 connections reset due to early user close 8746 connections aborted due to timeout 1 times unable to send RST due to no memory TCPSACKDiscard: 140077 TCPDSACKIgnoredOld: 1113 TCPDSACKIgnoredNoUndo: 43299 TCPSpuriousRTOs: 203 TCPSackShifted: 2101142 TCPSackMerged: 1698981 TCPSackShiftFallback: 962368 TCPReqQFullDrop: 592 TCPRcvCoalesce: 12741549 TCPOFOQueue: 2138714 TCPOFOMerge: 401 TCPChallengeACK: 1166 TCPSYNChallenge: 115 TCPFastOpenCookieReqd: 99534 TCPSpuriousRtxHostQueues: 14684 TCPAutoCorking: 522777 TCPFromZeroWindowAdv: 5170 TCPToZeroWindowAdv: 5171 TCPWantZeroWindowAdv: 83550 TCPSynRetrans: 973914 TCPOrigDataSent: 250418873 TCPACKSkippedSynRecv: 60 TCPACKSkippedPAWS: 900 TCPACKSkippedSeq: 11425 TCPACKSkippedTimeWait: 220 TCPACKSkippedChallenge: 1044 TCPWinProbe: 1341 TCPKeepAlive: 3440624 TCPDelivered: 251602231 TCPAckCompressed: 1026994 TcpTimeoutRehash: 1075931 TcpDuplicateDataRehash: 52105 TCPDSACKRecvSegs: 69626 TCPDSACKIgnoredDubious: 276551 IpExt: InMcastPkts: 2459135 OutMcastPkts: 841350 InBcastPkts: 521993 OutBcastPkts: 350186 InOctets: 816678687796 OutOctets: 2671968340361 InMcastOctets: 713887838 OutMcastOctets: 161067690 InBcastOctets: 49305467 OutBcastOctets: 33314198 InNoECTPkts: 7752006802 InECT1Pkts: 162368 InECT0Pkts: 4595 InCEPkts: 1518