Yes it is, you can download without fear.
Well, the new host for authentication is that I posted this. I've done several tests on multiple servers, and usually are authenticating.
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It was only you have read carefully the part of my post that says:
"After downloading, simply unzip the file and add the following path on the PC: C:\Windows\System32\drivers\etc"
Anyway, next time just have common sense and read fluently.
Below is the link to download L2Walker IG 2.18 along with the new hosts file for authentication L2Walker.
Download L2Walker IG 2.18d EN + hosts
After downloading, simply unzip the file and add the host to the following path: C:\Windows\System32\drivers\etc
Now run the L2Walker.exe folder in the L2Walker IG 2.18 and direct the path of l2.exe the system folder of the server you play. Click RUN and log on the server.
PS: The link to the L2Walker IG 2.18 is taken from the official website of L2Walker: ToWalker
I have received several PM's here at the Forum relating to the L2Walker Verify Fail.
Below is the link to download the new file "hosts".
DOWNLOAD NEW HOST L2WALKER
After downloading, simply unzip the file and add the following path on the PC: C:\Windows\System32\drivers\etc
I hope it can be useful for you.
Att: MasterWalker