tunnel – Tunneling from the Internet to my Chromecast

Suppose I want to allow my friend to play, from her home, a Google Slides presentation on my TV screen which is connected to a Chromecast device.

However, Google Slides only allows her to cast her presentation to a streamer on her local network. So I thought of the following scheme:

Suppose I start a tunnel client like ngrok on my computer, which forwards incoming traffic from the public ngrok server to my local Chromecast. This takes care of my side of the connection (in theory, at least).

My friend then needs to run a local server that impersonates a Chromecast on her network so that every packet she sends to that server is forwarded to the public ngrok server and from there to my Chromecast.

Has anyone successfully done such a thing?

Tunneling from the Internet to my Chromecast

Suppose I want to allow my friend to play, from her home, a Google Slides presentation on my TV screen which is connected to a Chromecast device.

However, Google Slides only allows her to cast her presentation to a streamer on her local network. So I thought of the following scheme:

Suppose I start a tunnel client like ngrok on my computer, which forwards incoming traffic from the public ngrok server to my local Chromecast. This takes care of my side of the connection (in theory, at least).

My friend then needs to run a local server that impersonates a Chromecast on her network so that every packet she sends to that server is forwarded to the public ngrok server and from there to my Chromecast.

Has anyone successfully done such a thing?

internet – Easy file transfer for big files?

I need to transfer a big file (2.4 GB) to another person over internet. The recipient doesn’t want to (or can’t?) install any new software to the PC.

I googled what are the preferred methods nowadays for this purpose, and I was lead to two quite interesting sounding free open-source services: file.pizza, instant.io and squidl.ink. All three seem to work through mere browsers, not needing any accounts and the transfer seems to happen between the source and recipient directly, without e.g. first having to upload the file to some server (which has restrictions how big the file can be) from which the recipient downloads it etc.

However, I just don’t seem to get those three services to work. I am using the Firefox browser with them as suggested. instant.io doesn’t really go anywhere when I add the file, while file.pizza and squidl.ink just seem to process the file seemingly forever, without giving any feedback if they are really doing anything or is the processing of the file progressing at all. I tried also with a bit smaller 400MB compressed file but didn’t have any better success. With a small file of 4MB of size, file and squidl did process it quickly.

Any idea if those aforementioned services should work (also with big files), how long does it normally take for them to process big files, and are there any alternatives that actually work?

What is this (internet?) window in Windows 7 and how can I close it?

I am using Windows 7 and this window is open. It stays on top of everything, in the right-hand corner of the screen.

What does it mean and how can I close it?

enter image description here

windows 10 – Open local files in Internet Explorer mode file extension allow list (Edge version 88.0705.74)

Im trying out the new feature in edge to open .MHT files in edge in IEmode.

  • I installed Edge version 88.0705.74 on Win 10 20h2
  • I set the policy Configure Internet Explorer integration (InternetExplorerIntegrationLevel) to iemode
  • I set the policy Open local files in Internet Explorer mode file extension allow list to .mht files

I tried different GPOs to help me succeed
-Open local files in Internet Explorer mode file extension allow list -enabled

But if i try to open the files they keep on opening in edge not in iemode. Do i need to do something with the assocation?

Openstack instance lost internet access after ataching floating ip

Maybe someone has same problem

I have installed Openstack Victoria on two virtualmachines (1 controller node, 1 compute node) running ubuntu 20.04. Each node has two network interfaces, mgmt network and provider network. I have created private network and i have attached it to router. With this configuration i am able to access internet.

But, when i attach floating IP to my instance, it lost internet connectivity. I can access this instance from outside, but instance cannot access network gateway. I checked it with ip netns exec ping 8.8.8.8 it is working until i attach FIP.

I think that is routing problem but i cannot find where? Do you guys have any ideas?

10.0.0.0/24 – mgmt network

10.0.2.0/24 – external (provider) network

configuration of linuxbrdige

root@compute1:/# grep -v “^#” /etc/neutron/plugins/ml2/linuxbridge_agent.ini | grep -v “^$”

(DEFAULT)

(agent)

extensions = qos

(linux_bridge)

physical_interface_mappings = provider:ens34

(network_log)

(securitygroup)

enable_security_group = true

firewall_driver = neutron.agent.linux.iptables_firewall.IptablesFirewallDriver

(vxlan)

enable_vxlan = true

local_ip = 10.0.0.131

l2_population = true

root@controller1:/# openstack subnet show provider

| Field | Value |

| allocation_pools | 10.0.2.50-10.0.2.150 |

| cidr | 10.0.2.0/24|

| created_at | 2021-02-22T16:17:20Z |

| description | |

| dns_nameservers | 8.8.8.8|

| dns_publish_fixed_ip | None |

| enable_dhcp | True |

| gateway_ip | 10.0.2.1|

| host_routes | |

| id | 7d07101a-4696-4ff8-88bc-fa4ffde1622f |

| ip_version | 4 |

| ipv6_address_mode | None |

| ipv6_ra_mode | None |

| name | provider |

| network_id | d65d17fe-9829-44d5-bf07-1abb70f9d523 |

| prefix_length | None |

| project_id | 957f142f850240b5801023369eace69a |

| revision_number | 0 |

| segment_id | None |

| service_types | |

| subnetpool_id | None |

root@controller1:/# openstack router show router1

| Field | Value |

| admin_state_up | UP |

| availability_zone_hints | |

| availability_zones | nova |

| created_at | 2021-02-22T16:17:51Z |

| description | |

| distributed | False |

| external_gateway_info | {“network_id”: “d65d17fe-9829-44d5-bf07-1abb70f9d523”, “external_fixed_ips”: ({“subnet_id”: “7d07101a-4696-4ff8-88bc-fa4ffde1622f”, “ip_address”: “10.0.2.51”}), “enable_snat”: true} |

| flavor_id | None |

| ha | False |

| id | fa11f06e-906c-4ae9-8176-20fb74e1cacd |

| interfaces_info | ({“port_id”: “67d37c5f-1250-45e7-a003-78493921b4d6”, “ip_address”: “172.16.1.1”, “subnet_id”: “b0762924-6c7a-453f-a9b8-788e15e5f0c0”}) |

| name | router1 |

| project_id | 957f142f850240b5801023369eace69a |

| revision_number | 4 |

| routes | |

| status | ACTIVE |

root@controller1:/# ip netns

qrouter-fa11f06e-906c-4ae9-8176-20fb74e1cacd (id: 3)

qdhcp-d65d17fe-9829-44d5-bf07-1abb70f9d523 (id: 0)

qdhcp-f6a245eb-001d-47b1-8af5-38178585fe87 (id: 6)

qdhcp-0fb79928-ae24-4d85-8c58-b1acb9c8c9d2 (id: 2)

qdhcp-0ab1f94c-1e06-485c-b024-548a927a5e36 (id: 1)

root@controller1:/# ip netns exec qrouter-fa11f06e-906c-4ae9-8176-20fb74e1cacd ping 8.8.8.8

PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.

64 bytes from 8.8.8.8: icmp_seq=1 ttl=128 time=11.7 ms

— 8.8.8.8 ping statistics —

1 packets transmitted, 1 received, 0% packet loss, time 0ms

rtt min/avg/max/mdev = 11.679/11.679/11.679/0.000 ms

root@controller1:/# ip netns exec qrouter-fa11f06e-906c-4ae9-8176-20fb74e1cacd ip route

default via 10.0.2.1 dev qg-61a6ea6f-7e proto static

10.0.2.0/24 dev qg-61a6ea6f-7e proto kernel scope link src 10.0.2.51

172.16.1.0/24 dev qr-67d37c5f-12 proto kernel scope link src 172.16.1.1

So everything is working fine… And now i am attaching FIP

root@controller1:/# openstack floating ip list

| ID | Floating IP Address | Fixed IP Address | Port | Floating Network | Project |

| 8a3333a9-345d-4b2a-9d63-420f09e4c020 | 10.0.2.106| 172.16.1.236| edef7b03-25a9-43b4-9953-831539056ac3 | d65d17fe-9829-44d5-bf07-1abb70f9d523 | 957f142f850240b5801023369eace69a |

It is pingable from my local PC and i can access instance via SSH as well

but i cannot access internet from provider network

root@controller1:/# ip netns exec qrouter-fa11f06e-906c-4ae9-8176-20fb74e1cacd ping 8.8.8.8

PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.

^C

— 8.8.8.8 ping statistics —

3 packets transmitted, 0 received, 100% packet loss, time 2040ms

This is tcpdump from compute node

root@compute1:/# tcpdump -i ens34 icmp

tcpdump: verbose output suppressed, use -v or -vv for full protocol decode

listening on ens34, link-type EN10MB (Ethernet), capture size 262144 bytes

17:30:00.258697 IP 10.0.2.106 > 8.8.8.8: ICMP echo request, id 41872, seq 0, length 64

17:30:01.259844 IP 10.0.2.106 > 8.8.8.8: ICMP echo request, id 41872, seq 1, length 64

So packets are going through provider interface -ens34. I think that is routing problem on compute node but i cannot find where it is.

wi fi – Laptop internet connection from SIM card’s wi-fi, instead of smartphone’s mobile hotspot wi-fi

When traveling, we usually connect our laptop to our smartphone’s wifi hotspot. In other words, the smartphone’s wifi subscription, on its SIM card, is projected for the laptop to use/piggyback.

Is it possible instead to somehow make the laptop access the smartphone’s SIM card directly instead? In the same way that the laptop has an SD card slot, is there such a thing as a SIM card slot or adaptor for laptops? The idea is to not have to require two hardware devices running at the same time (smartphone + laptop) just to have mobile internet when travelling. We just want to need the laptop in order to access the internet, not both

centos7 – Failed to start Berkeley Internet Name Domain (DNS)

I am on VPS using CentOS7 with CyberPanel. Today after updating the Custom Nameserver details; I have got an error when I am trying to restart/reload BINDS. Here is the error message:

(root@scandalous-cats ~)# systemctl start named.service
Job for named.service failed because the control process exited with error code. See “systemctl status named.service” and “journalctl -xe” for details.
(root@scandalous-cats ~)# systemctl status named.service
● named.service – Berkeley Internet Name Domain (DNS)
Loaded: loaded (/usr/lib/systemd/system/named.service; enabled; vendor preset: disabled)
Active: failed (Result: exit-code) since Sun 2021-02-21 20:56:37 UTC; 23s ago
Process: 11595 ExecStart=/usr/sbin/named -u named -c ${NAMEDCONF} $OPTIONS (code=exited, status=1/FAILURE)
Process: 11593 ExecStartPre=/bin/bash -c if ( ! “$DISABLE_ZONE_CHECKING” == “yes” ); then /usr/sbin/named-checkconf -z “$NAMEDCONF”; else echo “Checking of zone files is disabled”; fi (code=exited, status=0/SUCCESS)

Feb 21 20:56:37 scandalous-cats.com named(11596): initializing GeoIP Country (IPv4) (type 1) DB
Feb 21 20:56:37 scandalous-cats.com named(11596): GEO-106FREE 20180327 Build 1 Copyright (c) 2018 MaxMind Inc All Rights Reserved
Feb 21 20:56:37 scandalous-cats.com named(11596): initializing GeoIP Country (IPv6) (type 12) DB
Feb 21 20:56:37 scandalous-cats.com named(11596): GEO-106FREE 20180605 Build 1 Copyright (c) 2018 MaxMind Inc All Rights Reserved
Feb 21 20:56:37 scandalous-cats.com named(11596): GeoIP City (IPv4) (type 2) DB not available
Feb 21 20:56:37 scandalous-cats.com named(11596): GeoIP City (IPv4) (type 6) DB not available
Feb 21 20:56:37 scandalous-cats.com systemd(1): named.service: control process exited, code=exited status=1
Feb 21 20:56:37 scandalous-cats.com systemd(1): Failed to start Berkeley Internet Name Domain (DNS).
Feb 21 20:56:37 scandalous-cats.com systemd(1): Unit named.service entered failed state.
Feb 21 20:56:37 scandalous-cats.com systemd(1): named.service failed.

I am unable to figure-out the actual fault as well how to fix it. I need help regarding this and for fixing it.
Please help me.
Regards,

Internet Lifestyle Business ? | Proxies123.com

There are people who teach others how to do things. And they have made this their business. And they seem to be having this internet lifestyle business. Teaching others how to do things. And giving some generic advice. And this type of the people are out there. Mostly women who are into the mommy-site business. And there are some of those people in the Warriorforum. So it seems like this niche has some demand.

Do you think internet lifestyle business that is for instructors and the bloggers, a good option? Something you have experience with?

email – Retro-analysing an Internet Message

Multipurpose Internet Mail Extensions (MIME), defined by RFC 2045 makes different blocks of content. These are separated by boundaries.

The boundary is set in the Content-Type: header.

Your mail contains the header

Content-Type: multipart/alternative; boundary=”_———-=_MCPart_1894767556″

This means that the following content is presented in several alternative ways (all of them have the same content, albeit in different formats, the client should pick the last one it can handle, see section 5.1.4 of rfc2046), and it uses a boundary of «_———-=_MCPart_1894767556»

The parts will then start with two dashes and the boundary that was defined, up to finally finish with two dashes, the boundary and two dashes.

The boundary itself is a random string. It only needs not to appear inside any of the content. It is possible to have several multipart pieces one inside another, and so it is important that an outer boundary isn’t also used inside, as well as the boundary string itself not appearing in the text.

You will find different ways in which those boundaries are generated. Apparently MaiChip code uses “_———-=MCPart” followed by a number.

As for the other questions:

don’t get how to distinguish the header from the body.

The headers and the body are separated by an empty line. The body starts after the first empty line.

Also note, each MIME part has a header section by itself. I would recommend starting with a mail sent just in plaintext, before diving into multipart ones.

Also there is two field “Received:” why ?

It passed through two servers (and I guess you removed some more Received lines, since it would have needed to reach your mail server, as well).