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TCP IN connection from another user in my home network. Is it safe?

I'm using Comodo Firewall and I noticed that sometimes I'm getting TCP IN connection from another IP address in my home network (only one router and few wireless users): TCP IN | 192.168.1.50 | ...
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5k views

How does “traceroute over TCP” work, what are the risks, and how can it be mitigated?

There is a utility called tcptraceroute, and this enhancement called intrace that is used just like a standard traceroute, but it works over TCP. How is the syn flag in TCP used to achieve ...