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If the connection is only held for a few seconds would it also be valid to just run a recurring ss? Something like watch -n 1 "ss -np | grep 1.1.1.100"? I like the idea of repeated ss more than adding a manual arp entry, even if only temporary.

Centimane
– Centimane

2017-02-14 19:26:28 +00:00
Commented Feb 14, 2017 at 19:26
1

Yes, if you keep a careful eye on the output you should see it pass by. You might be better off doing while ! ss -p state syn-sent|grep 1.1.1.100;do sleep .1; done

meuh
– meuh

2017-02-14 19:41:17 +00:00
Commented Feb 14, 2017 at 19:41
You should add that to your answer

Centimane
– Centimane

2017-02-14 20:27:28 +00:00
Commented Feb 14, 2017 at 20:27

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