Sabrina's questions

I'm not sure if this problem caused by Lubuntu or Cisco Router side.

Lubuntu = 192.168.1.100
Cisco Router = 192.168.1.1

SSH from Lubuntu to Cisco Router

user@linux:~$ ssh -V
OpenSSH_7.6p1 Ubuntu-4ubuntu0.3, OpenSSL 1.0.2n  7 Dec 2017
user@linux:~$

user@linux:~$ ssh [email protected]
Unable to negotiate with 192.168.1.1 port 22: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1
user@linux:~$ 

This is on Cisco Router side

R1#
*Mar  1 01:41:19.631: SSH2 0: no matching cipher found: client [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],
R1#

SSH Verbose

user@linux:~$ ssh 192.168.1.1 -l admin -v
OpenSSH_7.6p1 Ubuntu-4ubuntu0.3, OpenSSL 1.0.2n  7 Dec 2017
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: Connecting to 192.168.1.1 [192.168.1.1] port 22.
debug1: Connection established.
debug1: key_load_public: No such file or directory
debug1: identity file /home/user/.ssh/id_rsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/user/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/user/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/user/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/user/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/user/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/user/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/user/.ssh/id_ed25519-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_7.6p1 Ubuntu-4ubuntu0.3
debug1: Remote protocol version 2.0, remote software version Cisco-1.25
debug1: match: Cisco-1.25 pat Cisco-1.* compat 0x60000000
debug1: Authenticating to 192.168.1.1:22 as 'admin'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: (no match)
Unable to negotiate with 192.168.1.1 port 22: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1
user@linux:~$ 

More Cisco Log

R1(config)#ip ssh logging events
R1(config)#
R1(config)#
*Mar  1 01:56:21.723: SSH2 0: no matching cipher found: client [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],
R1(config)#
*Mar  1 01:56:21.723: %SSH-5-SSH2_SESSION: SSH2 Session request from 192.168.1.100 (tty = 0) using crypto cipher '', hmac '' Failed
*Mar  1 01:56:21.723: %SSH-5-SSH2_CLOSE: SSH2 Session from 192.168.1.100 (tty = 0) for user '' using crypto cipher '', hmac '' closed
R1(config)#

What is the problem here and how to fix it?

Update 1

I've tried these as suggested here but it didn't solve the problem

user@linux:~$ ssh -oKexAlgorithms=+diffie-hellman-group1-sha1 192.168.1.1
Unable to negotiate with 192.168.1.1 port 22: no matching cipher found. Their offer: aes128-cbc,3des-cbc,aes192-cbc,aes256-cbc
user@linux:~$ 

user@linux:~$ ssh -oHostKeyAlgorithms=+ssh-dss 192.168.1.1
Unable to negotiate with 192.168.1.1 port 22: no matching cipher found. Their offer: aes128-cbc,3des-cbc,aes192-cbc,aes256-cbc
user@linux:~$ 

Whenever apt show lib typed then followed by tab button twice, the following possibilities will be displayed.

user@linux:~$ apt show lib
Display all 24553 possibilities? (y or n)
lib32asan0                                                        libisccfg-export160
lib32asan0-dbg                                                    libisc-export160
lib32asan2                                                        libisc-export169
*... output truncated ...*
lib32asan5-dbg-ppc64-cross                                        libisofs-dev
lib32asan5-dbg-s390x-cross                                        libisofs-doc
lib32asan5-dbg-sparc64-cross                                      libisoparser-java
--More--

There are over 20k possibilities, so there is --More-- option at the end of the page.

Would it be possible to print all these 20k output in a single screen so that I can grep the result or redirect it to a file without hitting spacebar button many times?

Initially, I had this problem after installing Cisco Packet Tracer 7.2.2

user@linux:~$ /opt/pt/bin/PacketTracer7
/opt/pt/bin/PacketTracer7: error while loading shared libraries: libQt5WebKitWidgets.so.5: cannot open shared object file: No such file or directory
user@linux:~$ 

It turns out 5 libraries were not found.

user@linux:~$ ldd /opt/pt/bin/PacketTracer7 | grep no
    libQt5WebKitWidgets.so.5 => not found
    libQt5WebKit.so.5 => not found
    libQt5Multimedia.so.5 => not found
    libQt5ScriptTools.so.5 => not found
    libQt5Sql.so.5 => not found
user@linux:~$ 

I followed suggestion from chili555 and managed to fix 4 of them https://askubuntu.com/a/987765/769117

sudo apt install libqt5webkit5 libqt5multimedia5 libqt5printsupport5 libqt5script5 libqt5scripttools5 

Then, I launched PacketTracer7 and found another one was missed which was libQt5Sql.so.5.

user@linux:~$ /opt/pt/bin/PacketTracer7 
/opt/pt/bin/PacketTracer7: error while loading shared libraries: libQt5Sql.so.5: cannot open shared object file: No such file or directory
user@linux:~$ 

Checked ldd again, and verified libQt5Sql.so.5 was missing. The other 4 were fixed on previous update.

user@linux:~$ ldd /opt/pt/bin/PacketTracer7 | grep no
    libQt5Sql.so.5 => not found
user@linux:~$ 

I tried to installed it but didn't work

user@linux:~$ sudo apt install libQt5Sql
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package libQt5Sql
user@linux:~$ 

I did not see anything helpful in syslog

user@linux:~$ cat /var/log/syslog | grep acket
user@linux:~$ 

What should I do to fix this?

There is a guide here to disable auto-login after installation Lubuntu 19.04, but I couldn't find a way to enable it.

The only information about how to enable/disable it is as follows, but there is no details how to re-enable it.

If you have autologin enabled and want to disable autologin open the file /etc/sddm.conf as root. To do this run

lxqt-sudo featherpad

and open /etc/sddm.conf. Then to disable autologin remove the entire line [autologin].

Existing /etc/sddm.conf config

user@linux:~$ cat -n /etc/sddm.conf
     1  [Autologin]
     2  Session=Lubuntu
     3  
user@linux:~$

During installation of Lubuntu 19.04, there is an option to Log in automatically without asking for the password.

Unfortunately, I can't find this setting anymore after installation.

I searched on the net but couldn't find any similar issues.

E.g. https://www.smarthomebeginner.com/enable-lubuntu-auto-login/

is for 12.04 or lower and there is no directory named /etc/lxdm/ or /etc/lightdm/ in 19.04.

https://www.maketecheasier.com/enable-automatic-login-in-ubuntu/

is for Ubuntu and there is no Automatic Login setting in User Accounts.

This is latest security advisory from VLC

Security Advisory 1901

Summary : Read buffer overflow & double free Date
: June 2019 Affected versions : VLC media player 3.0.6 and earlier ID : VideoLAN-SA-1901 CVE reference : CVE-2019-5439, CVE-2019-12874

Details

A remote user can create some specially crafted avi or mkv files that, when loaded by the target user, will trigger a heap buffer overflow (read) in ReadFrame (demux/avi/avi.c), or a double free in zlib_decompress_extra() (demux/mkv/utils.cpp) respectively Impact

If successful, a malicious third party could trigger either a crash of VLC or an arbitratry code execution with the privileges of the target user. Threat mitigation

Exploitation of those issues requires the user to explicitly open a specially crafted file or stream.

ASLR and DEP help reduce exposure, but may be bypassed. Workarounds

The user should refrain from opening files from untrusted third parties or accessing untrusted remote sites (or disable the VLC browser plugins), until the patch is applied. Solution

VLC media player 3.0.7 addresses the issue.

According to them, installing VLC media player 3.0.7 will fix the issue.

However, the one available in Ubuntu is the old version 3.0.4

user@linux:~$ apt show vlc
Package: vlc
Version: 3.0.4-1ubuntu0.2
Priority: optional
Section: universe/graphics
Origin: Ubuntu

Isn't this considered as high security risk?

I've been reading about this topis here and tried the solution given to change the terminal name (refer to the picture on item number 1)

But none of them can change the terminal's name (item number 1).

user@linux:~$ gnome-terminal --title="SOME TITLE HERE"
user@linux:~$ 

user@linux:~$ PROMPT_COMMAND='echo -ne "\033]0;SOME TITLE HERE\007"'
user@linux:~$ 

user@linux:~$ echo -ne "\033]0;SOME TITLE HERE\007"
user@linux:~$ 

I know that item number 2 can be changed with PS1. But the title (item number 1) still didn't change even after I change the PS1

user@linux:~$ is fine. I don't want to change this, I just want to rename the terminal's title on the top (item number 1)

In Ubuntu, VirtualBox installation via apt install virtualbox only offers the old version v5.2.18.

user@linux:~$ apt show virtualbox
Package: virtualbox
Version: 5.2.18-dfsg-2~ubuntu18.04.5
Priority: optional
Section: multiverse/misc
Origin: Ubuntu

Initially, I was using this version for a while.

Then, I decided to download and install the latest one (v6.0.8) available here.

user@linux:~$ sha256sum virtualbox-6.0_6.0.8-130520~Ubuntu~bionic_amd64.deb 
17f1a24848dcf8ec1025790d35281f7f38b2c98740ddbccac6259a0f4c1786f7  virtualbox-6.0_6.0.8-130520~Ubuntu~bionic_amd64.deb
user@linux:~$ 

Initially, I was not able to install the latest one.

user@linux:~$ sudo dpkg -i virtualbox-6.0_6.0.8-130520~Ubuntu~bionic_amd64.deb 
[sudo] password for user: 
Selecting previously unselected package virtualbox-6.0.
dpkg: considering removing virtualbox in favour of virtualbox-6.0 ...
dpkg: no, cannot proceed with removal of virtualbox (--auto-deconfigure will help):
 virtualbox-qt depends on virtualbox (= 5.2.18-dfsg-2~ubuntu18.04.5)
  virtualbox is to be removed.

dpkg: regarding virtualbox-6.0_6.0.8-130520~Ubuntu~bionic_amd64.deb containing virtualbox-6.0:
 virtualbox-6.0 conflicts with virtualbox
  virtualbox (version 5.2.18-dfsg-2~ubuntu18.04.5) is present and installed.

dpkg: error processing archive virtualbox-6.0_6.0.8-130520~Ubuntu~bionic_amd64.deb (--install):
 conflicting packages - not installing virtualbox-6.0
Errors were encountered while processing:
 virtualbox-6.0_6.0.8-130520~Ubuntu~bionic_amd64.deb
user@linux:~$ 

Removing VirtualBox 5.2.18 fixed the issue

user@linux:~$ sudo apt remove virtualbox
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  libgsoap-2.8.60 virtualbox-dkms
Use 'sudo apt autoremove' to remove them.
The following packages will be REMOVED:
  virtualbox virtualbox-qt
0 upgraded, 0 newly installed, 2 to remove and 0 not upgraded.
After this operation, 108 MB disk space will be freed.
Do you want to continue? [Y/n] y
(Reading database ... 229334 files and directories currently installed.)
Removing virtualbox-qt (5.2.18-dfsg-2~ubuntu18.04.5) ...
Removing virtualbox (5.2.18-dfsg-2~ubuntu18.04.5) ...
Processing triggers for mime-support (3.60ubuntu1) ...
Processing triggers for desktop-file-utils (0.23-1ubuntu3.18.04.2) ...
Processing triggers for man-db (2.8.3-2ubuntu0.1) ...
Processing triggers for shared-mime-info (1.9-2) ...
Processing triggers for gnome-menus (3.13.3-11ubuntu1.1) ...
Processing triggers for hicolor-icon-theme (0.17-2) ...
user@linux:~$ 

Then, I proceed with the installation again without any problem.

user@linux:~$ sudo dpkg -i virtualbox-6.0_6.0.8-130520~Ubuntu~bionic_amd64.deb 
(Reading database ... 229023 files and directories currently installed.)
Preparing to unpack virtualbox-6.0_6.0.8-130520~Ubuntu~bionic_amd64.deb ...
Unpacking virtualbox-6.0 (6.0.8-130520~Ubuntu~bionic) over (6.0.8-130520~Ubuntu~bionic) ...
Setting up virtualbox-6.0 (6.0.8-130520~Ubuntu~bionic) ...
addgroup: The group `vboxusers' already exists as a system group. Exiting.
Processing triggers for systemd (237-3ubuntu10.23) ...
Processing triggers for ureadahead (0.100.0-21) ...
ureadahead will be reprofiled on next reboot
Processing triggers for gnome-menus (3.13.3-11ubuntu1.1) ...
Processing triggers for desktop-file-utils (0.23-1ubuntu3.18.04.2) ...
Processing triggers for mime-support (3.60ubuntu1) ...
Processing triggers for hicolor-icon-theme (0.17-2) ...
Processing triggers for shared-mime-info (1.9-2) ...
user@linux:~$ 

Unfortunately, none of my previous image work with the new VirtualBox.

Failed to open a session for the virtual machine Ubuntu-18.04-Server.

The virtual machine 'Ubuntu-18.04-Server' has terminated unexpectedly during startup with exit code 1 (0x1).

Result Code: NS_ERROR_FAILURE (0x80004005)
Component: MachineWrap
Interface: IMachine {5047460a-265d-4538-b23e-ddba5fb84976}

What happened and how to fix this issue?

I notice that GNS3 v0.8.7-2 was installed on Ubuntu via sudo apt install gns3 instead of the new version which is GNS3 v2.1.20 as this question is asked.

May I know why Ubuntu still using the old version of GNS3 in it's repository?

user@linux:~$ sudo apt show gns3
Package: gns3
Version: 0.8.7-2
Priority: optional
Section: multiverse/net
Origin: Ubuntu
Maintainer: Ubuntu Developers <[email protected]>
Original-Maintainer: Daniel Lintott <[email protected]>
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Installed-Size: 22.7 MB
Depends: ucf, python:any (>= 2.7.5-5~), dynamips (>= 0.2.8), python-qt4 (>= 4.5), xdotool, xterm
Recommends: wireshark
Homepage: http://www.gns3.net/
Download-Size: 3,219 kB
APT-Sources: http://my.archive.ubuntu.com/ubuntu bionic/multiverse amd64 Packages
Description: Graphical Network Simulator
 GNS3 is a graphical network simulator that allows simulation of
 complex networks and to launch simulations on them. It is an excellent
 complementary tool to real labs for administrators of Cisco networks
 or people wanting to pass their CCNA, CCNP, CCIP or CCIE certifications.
 It can also be used to experiment with features of Cisco IOS or to check
 configurations that need to be deployed later on real routers.
 .
 You may configure devices ranging from Cisco routers, Cisco PIX firewalls,
 Cisco ASA Firewalls, Cisco IDS to JunOS routers using Qemu or Pemu. GNS3
 uses dynamips as an emulation back end, an IOS emulator which allows users
 to run IOS binary images from Cisco Systems.
 .
 Cisco IOS, PIX, ASA or JunOS software images are not included.

user@linux:~$ 

I know I can get the latest version by updating the repo and install it as follows.

sudo add-apt-repository ppa:gns3/ppa
sudo apt-get update
sudo apt-get install gns3-gui

I just want to know why Ubuntu didn't use the latest version of GNS3 by default?

There is a feature to magnify a screen area in Ubuntu. I've been trying it on Lubuntu 18 but it doesn't work.

What should I do to make this work on Lubuntu?

If this feature is not available in Lubuntu, what is alternative for this?

Reference https://help.ubuntu.com/stable/ubuntu-help/a11y-mag.html.en

Update

I've tested both xzoom and KMag and found KMag is better than xzoom. So I accepted that answer. If you know better apps, please let me know.

One thing I like Ubuntu compared to other distro is it's capability to do quick search.

I've been looking for everything (Windows tool) alternative for quite sometimes and it seems like this is the best at the moment.

However, this Ubuntu system search only search a local drive installed with the OS.

It doesn't search another physical drive.

Would it be possible to do this?

I need a simple image editor tool to draw a simple box/rectangle in an existing image, and probably write a simple text in it.

A similar but not the same question has been asked here before: Simple image editor?

The problem is that none of the solutions given can draw a simple box in an existing image. Pinta looks good, but this tool always crashes and doesn't help at all.

Others such as Shotwell, GThumb, Shutter don't even have a tool to draw a simple rectangle at all.

I'm looking for a very simple tool that can draw a box on existing image like this.

Please do not suggest GIMP, as I'm looking for a very simple tool, probably like Pinta, but not buggy and must be stable.

I've just installed Ubuntu without any problem using normal installation.

My GPU is Nvidia and Ubuntu is installed on SSD. (I've another HDD)

Then I decided to try the encryption feature as shown below.

Unfortunately, right after the first reboot, it just stuck at the encryption password screen. (this is not my actual screenshot, the image was taken from https://linuxhint.com/encrypt_drive_ubuntu/.

The actual message on my screen after I entered the password is cryptsetup (nvme0n1p3_crypt):set up successfully and it just stuck there like forever.

If you need more info to solve this issue, please let me know.

Existing OS is Windows 10 installed on SSD. When I tried to install Ubuntu, the only partition available is HDD. I don't see SSD at all. So, I have no choice but to install Ubuntu on HDD.

nvme0n1 = Windows 10, sda = Ubuntu

The following lsblk and df -h taken after installation of both OS. I'll reproduce the issue in VM and will share the screenshot later.

lsblk

user@ubuntu:~$ lsblk 
NAME        MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda           8:0    0 931.5G  0 disk 
├─sda1        8:1    0    16M  0 part 
├─sda2        8:2    0 187.1G  0 part 
├─sda3        8:3    0   513M  0 part 
└─sda4        8:4    0 743.9G  0 part /
nvme0n1     259:0    0   477G  0 disk 
├─nvme0n1p1 259:1    0   499M  0 part 
├─nvme0n1p2 259:2    0    99M  0 part /boot/efi
├─nvme0n1p3 259:3    0    16M  0 part 
└─nvme0n1p4 259:4    0 476.3G  0 part 
user@ubuntu:~$ 

df -h

user@ubuntu:~$ df -h
Filesystem      Size  Used Avail Use% Mounted on
udev            7.8G     0  7.8G   0% /dev
tmpfs           1.6G  2.1M  1.6G   1% /run
/dev/sda4       732G  7.8G  687G   2% /
tmpfs           7.8G   40M  7.8G   1% /dev/shm
tmpfs           5.0M  4.0K  5.0M   1% /run/lock
tmpfs           7.8G     0  7.8G   0% /sys/fs/cgroup
/dev/nvme0n1p2   95M   31M   65M  33% /boot/efi
tmpfs           1.6G   16K  1.6G   1% /run/user/121
tmpfs           1.6G   32K  1.6G   1% /run/user/1000
/dev/sda2       188G  3.2G  184G   2% /media/user/New Volume
user@ubuntu:~$ 

Would it be possible to install both OS in SSD, and not HDD?

I've been trying a few Linux File Manager such as PCManFM and Thunar in Lubuntu 18.10 and noticed that they did not remember the last session.

Would it be possible to do that? If yes, please let me know how.

If not, what is the alternative?

**I'm only looking for File Manager that support address bar, bookmark and dark background.

Default terminal in Lubuntu 18.10 is QTerminal. Somehow, I couldn't find any setting for transparency anywhere.

I found almost similar question here. Lubuntu terminal background tranparency

Unfortunately, that's meant for LXterminal in Ubuntu 18.04.1 LTS.

Would it be possible to do that in Lubuntu 18.10's QTerminal? If yes, please let me know how.

If not, what is the alternative?

UPDATE

Found the setting as advised by DK Bose, but it didn't work.

Somehow, I can't find any options to enable tree view in Lubuntu 18.10 File Manager. Would it be possible to do that? If yes, please let me know how.

If not, what is the alternative?

UPDATE

I've accepted answer from DK Bose as he provided answer for 2 of my questions.

I've been exploring another alternative and would like to share this as no one provided similar info yet.

Default File Manager (FM) for Lubuntu 18.10 is PCManFM-Qt. However 2 things I don't really like about this FM are it doesn't support tree view and dark background. It turns out I was wrong. I was only looking the tree view setting in View menu as shown in DK Bose's screenshot below.

Please take note that you won't find that setting there. Here is how to change the default "Places" setting to "Directory View".

However, PCManFM-Qt still doesn't support dark background. As I was reading about another FM, I found this link https://www.tecmint.com/top-best-lightweight-linux-file-managers/ and found PCManFM 1.3.0.

Apparently, PCManFM 1.3.0 is also developed by the same person, Hong Jen Yee (PCMan). And the best part is PCManFM 1.3.0 does support bookmark while Thunar is not.

The installation is very easy.

sudo apt install pcmanfm

The best part about PCManFM 1.3.0 is it does support dark background and bookmark too. Sorry Thunar, I found better alternative now for FM.

Hopefully this would help others too.

user@linux:~$ head -2 /etc/os-release
NAME="Ubuntu"
VERSION="18.10 (Cosmic Cuttlefish)"
user@linux:~$ 

The default theme in Lubuntu has light themes (Bright and White), though I prefer a dark theme (With greyish and blackish background, and white text) as that kind of theme is good for my eyes (strains less!!).

Therefore, I followed this link https://www.deviantart.com/satya164/art/elementary-Dark-GTK3-Theme-244257862 and tried to install it.

user@linux:~$ sudo add-apt-repository ppa:satyajit-happy/themes
 This PPA contains various themes for Gnome and Xfce.
 More info: https://launchpad.net/~satyajit-happy/+archive/ubuntu/themes
Press [ENTER] to continue or Ctrl-c to cancel adding it.

Ign:1 http://ppa.launchpad.net/satyajit-happy/themes/ubuntu cosmic InRelease                                            
Hit:2 http://archive.ubuntu.com/ubuntu cosmic InRelease                                                                 
Get:3 http://archive.ubuntu.com/ubuntu cosmic-updates InRelease [88.7 kB]                     
Get:4 http://security.ubuntu.com/ubuntu cosmic-security InRelease [88.7 kB]
Err:5 http://ppa.launchpad.net/satyajit-happy/themes/ubuntu cosmic Release
  404  Not Found [IP: 91.189.95.83 80]
Get:6 http://archive.ubuntu.com/ubuntu cosmic-backports InRelease [74.6 kB]          
Reading package lists... Done       
E: The repository 'http://ppa.launchpad.net/satyajit-happy/themes/ubuntu cosmic Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
user@linux:~$ 

user@linux:~$ sudo apt-get install elementary-dark-theme
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package elementary-dark-theme
user@linux:~$ 

However, I'm getting the error says that it "Unable to locate package elementary-dark-theme"

I've also tried Changing the background color of the File-Manager but didn't work too.

I would like to get black background and white/bright text on every application including File Manager. Please let me know how to accomplish this.

I observed the following message during Ubuntu installation. What is the meaning of SCSI3 (0,0,0) in Partition disks during Ubuntu installation?

I assume SCSI3 is the Small Computer System Interface 3 based on information from https://www.techopedia.com/definition/17302/scsi-3

Small Computer System Interface 3 (SCSI-3) is an ongoing standardization effort for extending the features of SCSI-2.

What about (0,0,0)? Any idea what are these numbers for?

I've attached the screenshot for your reference.

click here for the screenshot

I've just installed Squid 3.5.27 on Ubuntu Server 18.04

user@ubuntu:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 18.04 LTS
Release:        18.04
Codename:       bionic
user@ubuntu:~$ 


user@ubuntu:~$ dpkg -l | grep squid
ii  squid                                 3.5.27-1ubuntu1                    amd64        Full featured Web Proxy cache (HTTP proxy)
ii  squid-common                          3.5.27-1ubuntu1                    all          Full featured Web Proxy cache (HTTP proxy) - common files
ii  squid-langpack                        20170901-1                         all          Localized error pages for Squid
user@ubuntu:~$ 


user@ubuntu:~$ squid -v
Squid Cache: Version 3.5.27
Service Name: squid
Ubuntu linux
configure options:  '--build=x86_64-linux-gnu' '--prefix=/usr' '--includedir=${prefix}/include' '--mandir=${prefix}/share/man' '--infodir=${prefix}/share/info' '--sysconfdir=/etc' '--localstatedir=/var' '--libexecdir=${prefix}/lib/squid3' '--srcdir=.' '--disable-maintainer-mode' '--disable-dependency-tracking' '--disable-silent-rules' 'BUILDCXXFLAGS=-g -O2 -fdebug-prefix-map=/build/squid3-28YJxG/squid3-3.5.27=. -fstack-protector-strong -Wformat -Werror=format-security -Wno-error=deprecated -Wno-error=format-truncation -Wdate-time -D_FORTIFY_SOURCE=2 -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now -Wl,--as-needed' '--datadir=/usr/share/squid' '--sysconfdir=/etc/squid' '--libexecdir=/usr/lib/squid' '--mandir=/usr/share/man' '--enable-inline' '--disable-arch-native' '--enable-async-io=8' '--enable-storeio=ufs,aufs,diskd,rock' '--enable-removal-policies=lru,heap' '--enable-delay-pools' '--enable-cache-digests' '--enable-icap-client' '--enable-follow-x-forwarded-for' '--enable-auth-basic=DB,fake,getpwnam,LDAP,NCSA,NIS,PAM,POP3,RADIUS,SASL,SMB' '--enable-auth-digest=file,LDAP' '--enable-auth-negotiate=kerberos,wrapper' '--enable-auth-ntlm=fake,smb_lm' '--enable-external-acl-helpers=file_userip,kerberos_ldap_group,LDAP_group,session,SQL_session,time_quota,unix_group,wbinfo_group' '--enable-url-rewrite-helpers=fake' '--enable-eui' '--enable-esi' '--enable-icmp' '--enable-zph-qos' '--enable-ecap' '--disable-translation' '--with-swapdir=/var/spool/squid' '--with-logdir=/var/log/squid' '--with-pidfile=/var/run/squid.pid' '--with-filedescriptors=65536' '--with-large-files' '--with-default-user=proxy' '--enable-build-info=Ubuntu linux' '--enable-linux-netfilter' 'build_alias=x86_64-linux-gnu' 'CFLAGS=-g -O2 -fdebug-prefix-map=/build/squid3-28YJxG/squid3-3.5.27=. -fstack-protector-strong -Wformat -Werror=format-security -Wall' 'LDFLAGS=-Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now -Wl,--as-needed' 'CPPFLAGS=-Wdate-time -D_FORTIFY_SOURCE=2' 'CXXFLAGS=-g -O2 -fdebug-prefix-map=/build/squid3-28YJxG/squid3-3.5.27=. -fstack-protector-strong -Wformat -Werror=format-security -Wno-error=deprecated -Wno-error=format-truncation'
user@ubuntu:~$ 

Unfortunately, it doesn't work. This is the /var/log/squid/access.log

user@ubuntu:~$ sudo tail -F /var/log/squid/access.log
1530545854.655      1 192.168.0.254 TCP_DENIED/403 4037 GET http://detectportal.firefox.com/success.txt - HIER_NONE/- text/html
1530545857.667      1 192.168.0.254 TCP_DENIED/403 4037 GET http://detectportal.firefox.com/success.txt - HIER_NONE/- text/html
1530545860.673      0 192.168.0.254 TCP_DENIED/403 4037 GET http://detectportal.firefox.com/success.txt - HIER_NONE/- text/html

This is /etc/squid/squid.conf config

user@ubuntu:~$ egrep -nv '^#|^$' /etc/squid/squid.conf  
980:acl localnet src 192.168.0.0/24
982:acl SSL_ports port 443
983:acl Safe_ports port 80              # http
984:acl Safe_ports port 21              # ftp
985:acl Safe_ports port 443             # https
986:acl Safe_ports port 70              # gopher
987:acl Safe_ports port 210             # wais
988:acl Safe_ports port 1025-65535      # unregistered ports
989:acl Safe_ports port 280             # http-mgmt
990:acl Safe_ports port 488             # gss-http
991:acl Safe_ports port 591             # filemaker
992:acl Safe_ports port 777             # multiling http
993:acl CONNECT method CONNECT
1170:http_access deny !Safe_ports
1173:http_access deny CONNECT !SSL_ports
1176:http_access allow localhost manager
1177:http_access deny manager
1192:http_access allow localhost
1195:http_access deny all
1613:http_port 3128
4256:coredump_dir /var/spool/squid
4887:refresh_pattern ^ftp:              1440    20%     10080
4888:refresh_pattern ^gopher:   1440    0%      1440
4889:refresh_pattern -i (/cgi-bin/|\?) 0        0%      0
4890:refresh_pattern (Release|Packages(.gz)*)$      0       20%     2880
4893:refresh_pattern .          0       20%     4320
user@ubuntu:~$ 

What caused the issue? Was it ACL?

How to fix it?