내 서버가 다른 사이트로부터 지속적인 ACK 패킷을 받았고 아래와 같이 멈추지 않는 것을 발견했습니다(tcpdump를 사용하여 캡처했습니다).
- 원격 사이트는 https를 사용합니다.
- akamai, amazon..etc가 포함되어 있으며 이는 합법적이어야 합니다.
이전에 이러한 사이트에 대한 연결이 실패한 적이 있었는지 궁금합니다. 그런데 이런 일이 발생했습니다.
이러한 ACK 패킷을 받지 못하는 방법을 알고 싶습니다.
23:12:37.555238 IP prg02s12-in-f1.1e100.net.https > 192.168.192.128.52285: Flags [FP.], seq 0, ack 1, win 64240, length 0
23:12:37.555242 IP 17.167.192.152.https > 192.168.192.128.49292: Flags [FP.], seq 0, ack 1, win 64239, length 0
23:12:37.555246 IP prg02s12-in-f14.1e100.net.https > 192.168.192.128.49961: Flags [FP.], seq 0:55, ack 1, win 64240, length 55
23:12:37.555253 IP 17.164.1.38.https > 192.168.192.128.49844: Flags [FP.], seq 0:37, ack 1, win 64240, length 37
23:12:37.555293 IP a2-16-84-128.deploy.akamaitechnologies.com.https > 192.168.192.128.49850: Flags [FP.], seq 0:31, ack 1, win 64240, length 31
23:12:37.555301 IP 125.209.252.12.https > 192.168.192.128.49929: Flags [FP.], seq 0, ack 1, win 64240, length 0
23:12:37.555307 IP prg02s12-in-f4.1e100.net.https > 192.168.192.128.49964: Flags [FP.], seq 0:55, ack 1, win 64240, length 55
23:12:37.655195 IP fra07s31-in-f1.1e100.net.https > 192.168.192.128.58291: Flags [FP.], seq 0, ack 1, win 64240, length 0
23:12:37.655227 IP ec2-54-193-107-210.us-west-1.compute.amazonaws.com.https > 192.168.192.128.50448: Flags [FP.], seq 0:7, ack 1, win 64240, length 7
23:12:37.655233 IP fra07s31-in-f1.1e100.net.https > 192.168.192.128.41618: Flags [FP.], seq 0:110, ack 1, win 64240, length 110
23:12:37.655238 IP ec2-54-154-38-161.eu-west-1.compute.amazonaws.com.5223 > 192.168.192.128.48941: Flags [FP.], seq 0:7, ack 1, win 64240, length 7
23:12:37.655243 IP fra07s31-in-f1.1e100.net.https > 192.168.192.128.54130: Flags [FP.], seq 0:110, ack 1, win 64240, length 110
23:12:37.655247 IP prg02s12-in-f1.1e100.net.https > 192.168.192.128.52285: Flags [FP.], seq 0, ack 1, win 64240, length 0
23:12:37.655254 IP 17.167.192.152.https > 192.168.192.128.49292: Flags [FP.], seq 0, ack 1, win 64239, length 0
23:12:37.655259 IP prg02s12-in-f14.1e100.net.https > 192.168.192.128.49961: Flags [FP.], seq 0:55, ack 1, win 64240, length 55
23:12:37.655265 IP 17.164.1.38.https > 192.168.192.128.49844: Flags [FP.], seq 0:37, ack 1, win 64240, length 37
23:12:37.655271 IP a2-16-84-128.deploy.akamaitechnologies.com.https > 192.168.192.128.49850: Flags [FP.], seq 0:31, ack 1, win 64240, length 31
23:12:37.655275 IP 125.209.252.12.https > 192.168.192.128.49929: Flags [FP.], seq 0, ack 1, win 64240, length 0
23:12:37.655281 IP prg02s12-in-f4.1e100.net.https > 192.168.192.128.49964: Flags [FP.], seq 0:55, ack 1, win 64240, length 55