All Questions
19
questions
1
vote
0
answers
108
views
Gateway responding with ACK instead of server. Causes RST
I have a service running on my LAN which works very intermittently. It serves a webpage just fine right after I restart the server running macOS 14.1 (I noticed this happening on multiple versions of ...
- 11
0
votes
0
answers
99
views
Trying to secure my home network. Is it normal to have this many open TCP ports on my devices?
I recently bought Debokee (aka LANscan) & LittleSnitch. I'm wondering if this scan looks strange to anybody? I have a strong suspicion with evidence that my network has been compromised. I am just ...
- 1
1
vote
1
answer
937
views
Port forwarding stops working after a while
Second day in a row I am having a hard time setting up port forwarding on my mac. I was working on a micro service and wanted to utilize through web. I might have messed up some settings, because a ...
- 111
1
vote
2
answers
2k
views
Mac OSX: How to forward all outgoing traffic to specific host/port to different host/port?
I've been searching high and low for days and I'm 100% stuck with PF. Essentially I want to take all of my local, outbound traffic to ip/port redirect it to a different ip/port.
local application ...
0
votes
1
answer
82
views
(TCP?) My computer has trouble connecting to other services
Noticed that last night, my Discord voice channels would not connect (RTC connecting, then No Route), and League of Legends would not let me log in (Authenticating forever, but others could see my ...
- 103
0
votes
1
answer
192
views
How many connections can OSX support?
I'm using FTP software and it has an option of using 1-30 connections for uploading.
How many connections (internet) can an operating system like OSX make and how do I know what value to choose?
I ...
- 2,194
2
votes
2
answers
318
views
Cannot make a TCP connection on private network
I am testing the local connection between two OS X computers using netcat. They are both connected to the same router (through wifi) and have the same public IP, so I believe they have access to the ...
- 263
0
votes
2
answers
4k
views
Physical and wireless interfaces in macOS
I have a MacBook Pro (Retina, 13-inch, Late 2013) running macOS 10.12.1.
I know from reading another answer:
There's no eth0 on default configurations of OS X. By default, en0 and en1 are your ...
- 577
2
votes
3
answers
17k
views
How to manually send an ARP request
I recently sniffed with Tcpdump a packet "ARP, Request who-has 192.168.2.3 tell 192.168.2.2, length 28".
I would like to reproduce this message, and to send an ARP request from my laptop to any IP I ...
- 161
1
vote
0
answers
136
views
How can one redirect to a new host all traffic destined for an old host?
We're moving a bunch of services, say from 1.2.3.4 to 5.6.7.8.
In order to test that the new services are correctly configured, we'd like to redirect (to the new host) all traffic destined for the ...
- 166
1
vote
1
answer
1k
views
Changing TCP sliding window behaviour
We all know that TCP's congestion control uses additive (linear) increase and multiplicative decrease when adjusting sliding window size. Is there a way to change it to "linear decrease"?
When a ...
- 301
0
votes
1
answer
2k
views
How can I turn on ECN for Mac OSX?
I'd like to run some networking tests with Mac OSX 10.8 and using the ECN option. However I cannot find any documentation on how to configure it.
Does anybody know how to alter Mac OSX TCP networking ...
- 1,140
6
votes
1
answer
7k
views
What's up with port 8080 on my OSX box?
I thought a web server process I brought up was listening on localhost:8080, and tried to connect to it, but kept getting connection reset errors. As it turns out, I was mistaken and my process was ...
- 1,069
2
votes
2
answers
295
views
Is it possible to suspend a socket (SSH session, specifically) to switch network devices?
When resuming a tmux workspace on my laptop, I regularly have to decide between the wired and WiFi connection. Ethernet has very low latency, but forces me to reconnect any time the laptop is moved. ...
- 3,718
0
votes
1
answer
654
views
Gaining insight on TCP traffic
I have an iMac on which I turned off almost all applications. Browser, Skype, Spotify all turned off. Despite that, when I do a tcpdump I record still a lot of TCP traffic.
How can I get insight into ...
- 3,495