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77 questions
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0 votes
1 answer
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My scenario: I have two machines: 192.168.1.1 192.168.1.2 Machine 2 has a ssh server and I created a tunnel in machine 1 such as: ssh -CfND 7777 [email protected] -4 I ran above command in machine ...
PersianGulf's user avatar
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0 votes
1 answer
108 views

We routinely use netcat (nc) to read data from UDP ports. For example: user@host ~$ nc -luv 57303 Listening on [0.0.0.0] (family 0, port 57303) NAV 2024/12/05 12:09:56.326365 DPS112 $GPZDA,121003.35,...
PAUL MENA's user avatar
  • 9
0 votes
0 answers
129 views

I have a docker acting as VPN server in a host. Then, the traffic passes trhough the eth0 of the host from a VPN client, then encrypted traffic, and finally arrives to the tun0 in the docker. What I ...
Nfernandez's user avatar
  • 101
1 vote
1 answer
91 views

I have a camera that creates RTSP traffic. I connected it to a Linux PC via Ethernet, configured the network and access. But when I tried to apply QoS rules, the tc statistics showed that too few ...
eXulW0lf's user avatar
  • 21
5 votes
1 answer
617 views

I am unable to capture unicast traffic on the br0 (linux bridge) interface using the command tcpdump -nni any -vvv. Broadcast traffic, however, is captured as expected. Interestingly, unicast traffic ...
VictorLee's user avatar
  • 187
1 vote
0 answers
80 views

I recently setup a new server with Ubuntu 22.04. No web server, no no FTP server, no mail server; just a freshly installed Ubuntu Server where I did not much except installing some extras like nethogs ...
Luke's user avatar
  • 21
2 votes
2 answers
296 views

I am looking at a virtual server tariff that has limited outgoing traffic for a month, with billing if the traffic is exceeded. I would like to track the outgoing traffic automatically somehow, so ...
Mikhail Ramendik's user avatar
  • 538
1 vote
1 answer
772 views

I am trying to limit the download (ingress) rate for a certain app within a cgroup. I was able to limit the upload (egress) rate successfully by marking app's OUTPUT packets in iptables and then set a ...
user216385's user avatar
  • 63
2 votes
1 answer
1k views

I have a Rhel 8.7 machine with 2 NICs in different subnets. Let's say eth1-IP:10.10.10.4/24 ,gateway:10.10.10.1. This gateway is also the default gateway for this vm, and a second NIC: eth2, IP:10.10....
l0cal's user avatar
  • 21
0 votes
1 answer
131 views

How to separate the traffic of 3 network interfaces on Ubuntu 22.04 eno1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.1.48 netmask 255.255.255.0 broadcast 192.168....
God of Money's user avatar
  • 23
0 votes
1 answer
1k views

first of all I want to clear up that I'm not a network expert and just trying to understand things. I hope I can find help here and get a bit smarter.. I'm hosting a service on a Ubuntu 22.04 vps. ...
mojo_x's user avatar
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0 votes
1 answer
199 views

I am trying to set up a network scenario in which there is a variable delay between two nodes. Netem allows to set up a fixed delay and add a jitter according to some probabilistic distribution. ...
rul_h's user avatar
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1 vote
1 answer
1k views

I have a Raspberry Pi 4 with the latest build of (Debian) raspberry pi OS. I am trying to configure iptables to redirect all traffic coming from the Pi (with ) to another machine (lets say with an IP ...
Phippsy's user avatar
  • 31
0 votes
0 answers
873 views

I am currently sending ~9mpps, each packet is 72bytes large, and is a UDP DNS request. The packets are being sent to a Dell server I have using an intel i40e interface. The server is using all of its ...
Dave's user avatar
  • 732
1 vote
1 answer
1k views

I have a setup, one bridge is connected together with 3 ethernet ports eth1,eth2, eth3. How can I block the traffic from a client which is connected to eth1, based on client's MAC at bridge, br0 using ...
Franc's user avatar
  • 309

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