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The retransmits are triggered by the DupACKs. The client thinks the server is missing a packet.

The DupACKs are comming from a third system. The first ACKs from 192.168.4.149 are comming from a system with a TTL of 123 (5 hops away). The DupACKs are comming from a system with a TTL of 254 (2 hops away).

Loadbalancer? Firewall?

The retransmits are triggered by the DupACKs. The client thinks the server is missing a packet.

The DupACKs are comming from a third system. The first ACKs from 192.168.4.149 are comming from a system with a TTL of 123 (5 (probably 5 hops away). The DupACKs are comming from a system with a TTL of 254 (2 (higher TTL than the first system and probably only 2 hops away).

Loadbalancer? Firewall?