- A brief review on LAN Messenger
- A brief review on LAN Messenger problems
- UAC, digital signature and elevated privileges
- LAN Messenger does not see other computers in the network
- Settings and problems in terminal sessions
- Message history is not loaded in a chat window
- Impossible to send messages or files to offline users
- Notification about incoming messages
- Windows, windows, more windows…
- Impossible to send images to chat
- Files and conferences
- Interface flaws
- Security issues
- Help won’t help you
- Uninstaller does not delete all files
- Comparison of LAN Messenger and MyChat program for corporate communication
- Recommendation on moving to MyChat
1. A brief review on LAN Messenger
LAN Messenger is a free program to chat and exchange files in small local networks. It’s serverless and has versions for Windows, Linux, and macOS. You can’t use it in different subnets or over the Internet because it is not a client-server.
Unfortunately, the program development stopped, the very last version was released on July 25, 2012:
2. A brief review on LAN Messenger problems
We should admit that LAN Messenger deals well with its main function: it connects a couple of dozens of employees in a small local network quickly and for free.
There are problems with anti-virus software, firewalls, and user visibility (no centralized server). But in general — the program does its job.
We are going to take a look at main problems that can’t be solved due to technical reasons or just because LAN Messenger development stopped.
2.1. UAC, digital signature and elevated privileges
Unfortunately, the program installer requires elevated privileges and do not have a digital signature:
Without administrator rights, you can’t launch LAN Messenger and there is no portable version. The setup file requires elevated privileges because of two reasons: by default, the program is installed in the “\Program Files”:
+ it adds all TCP and UDP ports for lmc.exe application to Windows Brandmauer exception list.
2.2. Messenger does not see other computers in the network
This problem is based on the local messenger architecture. LAN Messenger does not have a centralized server and it is forced to check for its users in a local network with a help of UPD broadcast messaging periodically.
This is not reliable. For example, the situation when the chat is launched but you can’t see a person in your contact list because the contact list updates automatically but not instantly. To see each other users have to press F5:
It should be mentioned, that if a user is offline you can’t message him: there are no such things as offline messages and files in LAN messenger.
2.3. Settings and problems in terminal sessions
Message history and received files are stored in a Windows user profile folder. But settings are stored in the “C:\Users\%USERNAME%\AppData\Roaming\LAN Messenger\LAN Messenger.ini” — it means that Windows virtualizes the folder because the program tries to write the file to the \AppData which is not allowed.
The program is full of such contradictions: reliable SQLite is used to store message history but the unoptimized set of Qt library increases the size of installed chat to 40 megabytes.
Unluckily, the UDP Broadcast technology makes LAN Messenger work impossible in terminal sessions. The program won’t work because the first launched copy will take 50000 TCP and UDP ports. The next copies that you try to launch in the terminal server environment won’t work — ports will be busy.
2.4. Message history is present but not loaded in the chat window
Trying to exchange messages in the private dialogue. The notification about typing is provided which is good:
Closing the window and then open a conversation with the same person:
The program is not even trying to show us the old messages. If you need it — go to the history section where all messages are mixed up with dates and time but not sorted by people:
We noticed an unpleasant moment: if a message has empty strings at the beginning and end then the chat will “cut” them to not show garbage in the message window. However, the history shows all these spaces and the reading becomes difficult.
It’s weird that the message history is not saved in the common chat (there is no button to get it):
2.5. Impossible to send messages or files to offline users
If a user is offline he will not receive your message. Messages are visible in the common chat only if your chat is launched. As soon as you exit the program you will lose all messages:
And if you need to write a message or send a document to an offline user you won’t be able to do this because he disappears from your contact list. Even if you leave the window of your private conversation open the message still won’t be sent:
What is more, this message remains in your history but not in a receiver’s history (even if he connects again when you are online). The program should synchronize them by logic but it can’t do it.
2.6. Notification about incoming messages
Another weak side of LAN Messenger is notifications: you need to open the program to check for new messages:
But if someone enters or exits the chat you will see the pop-up notification:
With 20-30 online users, there will be a lot of notifications that you can’t disable, by the way. Well, you can turn off everything at all but then you are at risk to miss important messages.
2.7. Windows, windows, more windows
Another contradiction that amazes us. The settings window is constructed in quite a good way — it is modal. It means that you can open settings, do what you need and close the window (the main program is unavailable during these actions). Such a window is the only one.
The program itself is a big number of windows for various actions: separate dialogues, conferences, common chat rooms, user information, etc. All those windows are located on your desktop and you have to close them one by one.
If you minimize the program's main window to the tray other windows will remain in the same position. In that case, the most convenient solution is to exit the program and launch it again.
LAN Messenger does not a hotkey, so you need to mouse click on the icon to call it from the system tray.
2.8. Impossible to send images to chat
The program has the color spectrum to markup links and you can open them in a browser, but there is no image transfer. You can only send them directly as files.
Also, there is no integration with Explorer: you can’t copy files by Ctrl+C and paste them in the chat — LAN Messenger does not have such a feature.
2.9. Files and conferences
You can’t exchange documents in conferences — it’s possible only in private dialogues. In other words, if you need to send a document to the department of 10 people you have to do it separately for each person.
Sending an email will be more comfortable than this inconvenient procedure.
2.10. Interface flaws
You can get used to it but if you use the program every day it’s getting annoying.
Clicking on the status change button does nothing — you have to target the right part of the button that opens the status menu.
If you exit the program and launch it back — a status won’t change. Although, users often forget about changing their status. For example, you set “Do Not Disturb” status, shut down your computer (or put it in the sleep mode) at the end of the day, and the next day you did not receive a single notification.
It’s happening because the program did not set the “Available” status after restarting or opening the laptop.
2.11. Security issues
LAN Messenger does not have any authentication mechanisms. No logins/passwords or checks for user authenticity. It is also easy to rename yourself and show up as a different person for other users.
No system for rights and permission: you can see the IP address and computer name of another user which is unacceptable:
Messages are encrypted by an unknown algorithm which reliability is doubtful. Developers say on the website that it’s AES with a key exchange via RSA. But it still unclear how those keys are generated, what is their size, and how reliably the client authentication is performed.
besides, Wireshark shows that even a simple message for 3 words has almost 1 kilobyte in size of incoming and outgoing traffic:
Take this in mind if you are going to use LAN Messenger in a big network. It will generate a large amount of garbage traffic due to its architecture peculiarities.
2.12. The help won’t help you
There is no Help in LAN Messenger:
All links are invalid:
The Help was not integrated with the program — it was located on the Internet. It’s a little bit weird for a product that considers itself as an internal local messenger.
Official support forum does not work: users are left alone with their problems and questions.
2.13. Uninstaller does not delete all files
Unfortunately, you have to do cleaning after LAN Messenger uninstaller manually.
The uninstaller leaves the ” C:\Users\%USERNAME%\AppData\Local\LAN Messenger\LAN Messenger\group.cfg” file in the Register for Autostart:
3. Comparison of LAN Messenger and MyChat program for corporate communication
Take into the consideration three main facts:
- LAN Messenger development stopped in 2012. If you are still dealing with this program — look for a good alternative.
- LAN Messenger is peer-to-peer chat, with the minimum of settings and no central server. It’s a good solution for small local networks with 10-20 computers. But still unreliable.
- Without the client-server technology, you won’t get reliability, management and ability to work in multi-segment corporate networks or over the Internet.
In the table below we compared basic functions of LAN Messenger version 1.2.35 and MyChat 7.0 (free version) on June 12, 2018.
|Installation, uninstallation and update system|
|1.4||Automatic updating system||No||Yes|
|1.5||Automatic updating and saving of all the data when installing the latest version over the old one||No new versions||Yes|
|2.1||Work in large networks||No||Yes|
|2.2||Work in complex networks and via the Internet||No||Yes|
|2.3||Message guaranteed delivery||No||Yes|
|2.4||Work in terminal sessions||No||Yes|
|2.5||Traffic encryption||Unknown,unreliable||OpenSSL, industrial standard|
|2.6||Work in very bad networks(satellite connection, "long" pings)||No||Yes|
|3.3||Notifications with a return receipt||No||Yes|
|3.4||Common Bulletin board||No||Yes|
|3.6||Images transfer||Yes, online||Yes|
|3.7||Automatic backlight for links in a text||Yes||Yes|
|3.8||Messages history view||Yes||Yes|
|3.9||Event sound notificaton||Yes||Yes|
|3.10||Personal contact list||Yes||Yes|
|3.11||Sending messages and files to offline users||No||Yes|
|3.12||Graphic smileys||Yes, but limited||Yes|
|Active Directory integration|
|4.1||MSI package to deploy users via Group Policy||No||Yes|
|4.2||User transparent authorization||No||Yes|
|4.3||Importing users from the Windows domain||No||Yes|
|4.4||Support for any amount of various domains||No||Yes|
|4.5||Collaboration between common and domain users||No||Yes|
|5.1||GUI languages||Yes, UNICODE||Yes, UNICODE|
|6.1||Centralized configuration of user rights and restrictions||No||Yes|
|6.3||IP, MAC filters||No||Yes|
|6.4||Anti-spam and anti-flood filters||No||Yes|
|6.5||User management system||No||WEB interface|
|6.6||Detailed reference information about users (Full name, email, phone numbers, date of birth, photo, etc.)||No||Yes|
|8.1||User network status "free", "busy", "away"||Yes||Yes|
|8.2||Scripting language tow write simple programs which extend chat abilities||No||Yes|
|8.3||Integration with external services||No||Yes (1С, phpBB, REST, php, C#, Delphi, Python etc.)|
|8.4||User search system||No||Yes|
|8.5||Tree-like contact list that is common for the whole network with an unlimited nesting level||No||Yes|
|8.6||Account manager for several users who work on the same program||No||Yes|
|8.7||User ignore system||No||Yes|
|8.8||Plug-in system to extend program abilities||No||Yes|
|8.9||Company department list||No||Yes|
|8.10||Company work position list with the sorting "superiors from above" in the contact list||No||Yes|
|9.1||Built-in help system||No||Yes|
|9.2||Community support forum||No||Yes|
|9.3||Developer support via email||No||Yes|
|9.4||Additional reference information, articles about the program use on the website, blog, etc.||No||Yes|
|9.5||Developers support via Skype, Viber, Telegram, WhatsApp||No||Yes|
4. Recommendation on moving to MyChat
LAN messenger company intranet chat has not been developing for a long time; the compatibility with new operating systems becomes worse; no perspectives for mobile OS support. The program replacement is just a question of time.
It will be easy to move from LAN Messenger to MyChat because for small companies up to 20 online users there is a free standard MyChat license with some insignificant limits (what is the difference between commercial and free MyChat versions?).
For bigger enterprises with 20 users and more, you should compare prices of MyChat closest competitors such as Skype for business or TrueConf.
The MyChat license agreement is quite loyal. One online user costs $6. Starting from the date of purchase you get one year of free updates and then you can chose whether to pay $2 per user or stay on the existing license for an unlimited amount of time (the server will still work). Notice that almost all MyChat Services are included in this price (except MyChat Guest and Distrib maker).
MyChat has a long development history since 2004. New versions are released 5-6 times a year.
Take advantage of the speed and quality of the MyChat official support forum. Our team is always ready to help you!
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