I have two machines on the same subnet.
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A B
192.168.1.70 192.168.1.84
HTTP POST ---------------> Running Apache2
But, on A, I run a similar client, point it at the IP of B, and it returns with an error says the host can not be found.
However, the HTTP packet from A does get to B (I can see it on tcpdump).
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$ sudo tcpdump -A -n -s0 port 80
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on wlp2s0, link-type EN10MB (Ethernet), capture size 262144 bytes
15:05:41.374623 IP 192.168.1.70.36118 > 192.168.1.84.80: Flags [S], seq 2475291540, win 65535, options [mss 1460,sackOK,TS val 38919385 ecr 0,nop,wscale 8], length 0
E..</M@.@......F...T...P.............d.........
.Q..........
The firewall ufw is off.
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$ sudo ufw status
Status: inactive
Any pointers ?