The Transmission Control Protocol (TCP) is a core protocol of the Internet protocol suite.

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TCP Congestion Control Algorithm of OSX10.7

How can I find out which algorithm OSX10.7 uses (NewReno, SACK, Tahoe...) and if possible, how can I change it?
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538 views

How do I further diagnose TCP connectivity (timeout) problems? (ICMP, DNS work fine)

I have two Macs behind a cable modem/WAP. One works fine. The other is able to ping servers but is unable to telnet to them. For instance pinging what.org works fine but I get operation timed out ...
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How to increase value of tcbhashsize parameter in OS X

I am running OS X 10.11 - El Capitan. I am trying to tune my TCP setting for better network / Internet performance. Most of the settings I have been able to modify permanently through /etc/sysctl.conf ...
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How to enable echo service for tcp or udp on well-known port 7 on Mac OS X 10.8 or above?

I am learning TCP/IP protocol with a Mac, and need echo service (refer to [RFC 862], or Wiki) to test network. But it seems to OS X doesn't implement it or disable it. I learned that launchd replaced ...
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save IPv4 address for different WIFI

I have a macbook pro, that I use at work and in my house, the problem is that i have to set up manually the TCP/IP IPv4 address for each place, the address doesn't change once im on a location, but I ...
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Find who is intercepting traffic on port 80

Every 7–10 days, all internet browsing on my Mac stops working. I can use Firefox, Safari, Chrome, but I'm able to surf only Google and few other sites. So I tried to telnet a webserver on the local ...
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Limiting TCP connections

How can I limit TCP connections on Mac using Terminal? I used iptables on Linux (eOS) to limit the connections of an application (Ace Stream Player) as follows: $iptables -A OUTPUT -m limit --limit ...
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pf port-forwarding on OS X Yosemite to avoid block

My ISP blocked a TCP port, let's say $ip1:$port1 So I setup $ip2:$port2 on my own VPS to get around it. How can I forward all traffic to $ip1:$port1 on OS X Yosemite as client to $ip2:$port2 using ...