IP Setup Question

[Willi2k]

L2J Revision Number: 4418
L2JDP Revision Number: 7665

Greetings!

First of all, I know that you guys don't like answering newbie questions, but I've spent the last 3 hours or so searching on this forum and on the internet about this particular problem.

I came here about a month ago and I wanted to start learning about L2J so I started reading and I managed to mount an Epilogue test server successfully. Now that Freya was released, I wanted to test it.

I followed the guide again and the gameserver and loginserver were okay, but when I try to log in (with a clean and updated Freya client) i get stuck in "You are currently logging in". Now I know my problem lies with my IP configuration so I'll show you my files. The problem is that since the server.properties file changed, I'm not sure about the IP setup.

BTW, my IP (from http://whatsmyip.org) is 201.248.9.87

My server.properties file:

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# ---------------------------------------------------------------------------# Game Server Settings# ---------------------------------------------------------------------------# This is the server configuration file. Here you can set up the connection information for your server.# This was written with the assumption that you are behind a router.# Dumbed Down Definitions...# LAN (LOCAL area network) - typically consists of computers connected to the same router as you.# WAN (WIDE area network) - typically consists of computers OUTSIDE of your router (ie. the internet).# x.x.x.x - Format of an IP address. Do not include the x'es into settings. Must be real numbers.# ---------------------------------------------------------------------------# Networking# ---------------------------------------------------------------------------## Note: External/Internal address definitions was moved to the ipconfig.xml# # Where's the Login server this gameserver should connect to# Default: 127.0.0.1LoginHost = 201.248.9.87 # TCP port the login server listen to for gameserver connection requests# Default: 9014LoginPort = 9014 # Bind address for gameserver. You should not need to change it in most cases.# Default: * (0.0.0.0)GameserverHostname = * # Default: 7777GameserverPort = 7777  # ---------------------------------------------------------------------------# Database# ---------------------------------------------------------------------------# Specify the appropriate driver and url for the database you're using.# Examples:# Driver = com.mysql.jdbc.Driver (default)# Driver = org.hsqldb.jdbcDriver# Driver = com.microsoft.sqlserver.jdbc.SQLServerDriverDriver = com.mysql.jdbc.Driver# Database URL# URL = jdbc:mysql://localhost/l2jdb (default)# URL = jdbc:hsqldb:hsql://localhost/l2jdb# URL = jdbc:sqlserver://localhost/database = l2jdb/user = sa/password = rootURL = jdbc:mysql://localhost/l2jdb# Database user info (default is "root" but it's not recommended)Login = root# Database connection passwordPassword = root # Default: 100MaximumDbConnections = 100 # Default: 0MaximumDbIdleTime = 0 # ---------------------------------------------------------------------------# Misc Server Settings# ---------------------------------------------------------------------------# This is the server ID that the Game Server will request.# Example: 1 = Bartz# Default: 1RequestServerID = 65 # True = The Login Server will give an other ID to the server if the requested ID is already reserved.# Default: TrueAcceptAlternateID = True # Datapack root directory.# Defaults to current directory from which the server is started unless the below line is uncommented.#DatapackRoot = C:/Work/tmp/DataPack # Define how many players are allowed to play simultaneously on your server.# Default: 100MaximumOnlineUsers = 100 # Numbers of protocol revisions that server allows to connect.# Delimiter is ;# WARNING: <u><b><font color="red">Changing the protocol revision may result in incompatible communication and many errors in game!</font></b></u># Default: 216AllowedProtocolRevisions = 216  # ---------------------------------------------------------------------------# Misc Player Settings# --------------------------------------------------------------------------- # Character name template.# Examples:# CnameTemplate = [A-Z][a-z]{3,3}[A-Za-z0-9]*# The above setting will allow names with first capital letter, next three small letters,# and any letter (case insensitive) or number, like OmfgWTF1# CnameTemplate = [A-Z][a-z]*# The above setting will allow names only of letters with first one capital, like Omfgwtf# Default .* (allows any symbol)CnameTemplate = .* # This setting restricts names players can give to their pets.# See CnameTemplate for detailsPetNameTemplate = .* # Maximum number of characters per account.# Default: 7 (client limit)CharMaxNumber = 7

My ipconfig.xml file:

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  <?xml version="1.0" encoding="utf-8" ?> - <!--  Put old contents of ExternalHostname here, used by default   --> - <gameserver address="201.248.9.87">- <!--  Localhost access   -->   <define subnet="127.0.0.0/8" address="127.0.0.1" /> - <!--  LAN's, put old contents of InternalHostname here   -->   <define subnet="10.0.0.0/8" address="10.0.0.0" />   <define subnet="172.16.0.0/19" address="172.16.0.0" />   <define subnet="192.168.0.0/16" address="192.168.0.0" />   </gameserver>

My loginserver.properties file:

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# ---------------------------------------------------------------------------# Login Server Settings# ---------------------------------------------------------------------------# This is the server configuration file. Here you can set up the connection information for your server.# This was written with the assumption that you are behind a router.# Dumbed Down Definitions...# LAN (LOCAL area network) - typically consists of computers connected to the same router as you.# WAN (WIDE area network) - typically consists of computers OUTSIDE of your router (ie. the internet).# x.x.x.x - Format of an IP address. Do not include the x'es into settings. Must be real numbers.# ---------------------------------------------------------------------------# Networking# --------------------------------------------------------------------------- # Bind ip of the LoginServer, use * to bind on all available IPs# Default: *LoginserverHostname = 201.248.9.87 # Default: 2106LoginserverPort = 2106 # The address on which login will listen for GameServers, use * to bind on all available IPs# Default: *LoginHostname = * # The port on which login will listen for GameServers# Default: 9014LoginPort = 9014 # The delay in minutes after which the login updates the gameservers IP's (usefull when their ip is dynamic)# Default: 15IpUpdateTime = 15  # ---------------------------------------------------------------------------# Security# ---------------------------------------------------------------------------# Default: TrueLogLoginController = True # How many times you can provide an invalid account/pass before the IP gets banned.# Default: 10LoginTryBeforeBan = 10 # Time you won't be able to login back again after LoginTryBeforeBan tries to login.# Default: 600 (10 minutes)LoginBlockAfterBan = 600 # If set to True any GameServer can register on your login's free slots# Default: FalseAcceptNewGameServer = False # Enforce GameGuard authorization from client?# If True, login server will kick client if the client bypassed GameGuard authentication.# Default: FalseForceGGAuth = False # Flood Protection. All values are in MILISECONDS.# Default: TrueEnableFloodProtection = True # Default: 15FastConnectionLimit = 15 # Default: 700NormalConnectionTime = 700 # Default: 350FastConnectionTime = 350 # Default: 50MaxConnectionPerIP = 50  # ---------------------------------------------------------------------------# Database# ---------------------------------------------------------------------------# Specify the appropriate driver and url for the database you're using.# Examples:# Driver = com.mysql.jdbc.Driver (default)# Driver = org.hsqldb.jdbcDriver# Driver = com.microsoft.sqlserver.jdbc.SQLServerDriverDriver = com.mysql.jdbc.Driver# Database URL# URL = jdbc:mysql://localhost/l2jdb (default)# URL = jdbc:hsqldb:hsql://localhost/l2jdb# URL = jdbc:sqlserver://localhost/database = l2jdb/user = sa/password = rootURL = jdbc:mysql://localhost/l2jdb# Database user info (default is "root" but it's not recommended)Login = root# Database connection passwordPassword = root # Default: 10MaximumDbConnections = 10 # Default: 0MaximumDbIdleTime = 0  # ---------------------------------------------------------------------------# Misc.# ---------------------------------------------------------------------------# If False, the license (after the login) will not be shown.# Default: TrueShowLicence = True # Default: TrueAutoCreateAccounts = True  # ---------------------------------------------------------------------------# Developer Settings# ---------------------------------------------------------------------------# Default: FalseDebug = False # Default: FalseAssert = False # Default: FalseDeveloper = False

My hosts file:

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201.248.9.87 L2authd.lineage2.com

And that's it I guess. I'm really sorry I know you guys insist on searching but I've searched and I can't seem to find the solution. I'm sure it's just a misplaced IP or something like that, but I've changed and tried everything to no avail. Please remember I'm just starting and I'm eager to learn.

I hope you guys can help me!

[MELERIX]

you don't need to change the IPs in server/login configs... you only need to modify ipconfig.xml thats all

[Willi2k]

Ok, I returned the server/login config files to the way they were, unchanged. But I'm still getting stuck on "You are currently logging in."

[MELERIX]

check ports 7777 & 2106

[Willi2k]

Both ports open up when I run startgameserver.bat and startloginserver.bat, double-checked with http://www.whatsmyip.org/ports/

still can't login

[_DS_]

Ok, I returned the server/login config files to the way they were, unchanged. But I'm still getting stuck on "You are currently logging in."

You does not need gameserver (and ipconfig.xml) for login process at all. Problem is in editing hosts.

[Willi2k]

what's the problem with my hosts file then? I've tried with

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127.0.0.1 l2authd.lineage2.com

and

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201.248.9.87 l2authd.lineage2.com 

[Willi2k]

Nevermind, it somehow started working. Thanks for the help ^^

/thread

[EvilHoe]

i think what confuses people is once you seutp the wan you can only connect on some comp with local ip not the wan ip. at least thats my guess on the matter. really would love to have someone test my server see if its setup right to accept connections yet plz send a privet message if you can thanks.

also wanted to ask someone if there is link to explain the subnets strings in the ip xml more thanks.

[Shaka]

Your configuration should be this:


loginserver.properties

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 # ---------------------------------------------------------------------------# Login Server Settings# ---------------------------------------------------------------------------# This is the server configuration file. Here you can set up the connection information for your server.# This was written with the assumption that you are behind a router.# Dumbed Down Definitions...# LAN (LOCAL area network) - typically consists of computers connected to the same router as you.# WAN (WIDE area network) - typically consists of computers OUTSIDE of your router (ie. the internet).# x.x.x.x - Format of an IP address. Do not include the x'es into settings. Must be real numbers.# ---------------------------------------------------------------------------# Networking# --------------------------------------------------------------------------- # Bind ip of the LoginServer, use * to bind on all available IPs# Default: *LoginserverHostname = * # Default: 2106LoginserverPort = 2106 # The address on which login will listen for GameServers, use * to bind on all available IPs# Default: *LoginHostname = * # The port on which login will listen for GameServers# Default: 9014LoginPort = 9014 # The delay in minutes after which the login updates the gameservers IP's (usefull when their ip is dynamic)# Default: 15IpUpdateTime = 15  # ---------------------------------------------------------------------------# Security# ---------------------------------------------------------------------------# Default: TrueLogLoginController = True # How many times you can provide an invalid account/pass before the IP gets banned.# Default: 10LoginTryBeforeBan = 10 # Time you won't be able to login back again after LoginTryBeforeBan tries to login.# Default: 600 (10 minutes)LoginBlockAfterBan = 600 # If set to True any GameServer can register on your login's free slots# Default: FalseAcceptNewGameServer = False # Enforce GameGuard authorization from client?# If True, login server will kick client if the client bypassed GameGuard authentication.# Default: FalseForceGGAuth = False # Flood Protection. All values are in MILISECONDS.# Default: TrueEnableFloodProtection = True # Default: 15FastConnectionLimit = 15 # Default: 700NormalConnectionTime = 700 # Default: 350FastConnectionTime = 350 # Default: 50MaxConnectionPerIP = 50  # ---------------------------------------------------------------------------# Database# ---------------------------------------------------------------------------# Specify the appropriate driver and url for the database you're using.# Examples:# Driver = com.mysql.jdbc.Driver (default)# Driver = org.hsqldb.jdbcDriver# Driver = com.microsoft.sqlserver.jdbc.SQLServerDriverDriver = com.mysql.jdbc.Driver# Database URL# URL = jdbc:mysql://localhost/l2jdb (default)# URL = jdbc:hsqldb:hsql://localhost/l2jdb# URL = jdbc:sqlserver://localhost/database = l2jdb/user = sa/password = URL = jdbc:mysql://localhost/l2jdb# Database user info (default is "root" but it's not recommended)Login = root# Database connection passwordPassword = ***** # Default: 10MaximumDbConnections = 10 # Default: 0MaximumDbIdleTime = 0  # ---------------------------------------------------------------------------# Misc.# ---------------------------------------------------------------------------# If False, the license (after the login) will not be shown.# Default: TrueShowLicence = True # Default: TrueAutoCreateAccounts = False  # ---------------------------------------------------------------------------# Developer Settings# ---------------------------------------------------------------------------# Default: FalseDebug = False # Default: FalseAssert = False # Default: FalseDeveloper = False 

server.properties

Code: Select all

 # ---------------------------------------------------------------------------# Game Server Settings# ---------------------------------------------------------------------------# This is the server configuration file. Here you can set up the connection information for your server.# This was written with the assumption that you are behind a router.# Dumbed Down Definitions...# LAN (LOCAL area network) - typically consists of computers connected to the same router as you.# WAN (WIDE area network) - typically consists of computers OUTSIDE of your router (ie. the internet).# x.x.x.x - Format of an IP address. Do not include the x'es into settings. Must be real numbers.# ---------------------------------------------------------------------------# Networking# ---------------------------------------------------------------------------## Note: External/Internal address definitions was moved to the ipconfig.xml# # Where's the Login server this gameserver should connect to# Default: 127.0.0.1LoginHost = 127.0.0.1 # TCP port the login server listen to for gameserver connection requests# Default: 9014LoginPort = 9014 # Bind address for gameserver. You should not need to change it in most cases.# Default: * (0.0.0.0)GameserverHostname = * # Default: 7777GameserverPort = 7777  # ---------------------------------------------------------------------------# Database# ---------------------------------------------------------------------------# Specify the appropriate driver and url for the database you're using.# Examples:# Driver = com.mysql.jdbc.Driver (default)# Driver = org.hsqldb.jdbcDriver# Driver = com.microsoft.sqlserver.jdbc.SQLServerDriverDriver = com.mysql.jdbc.Driver# Database URL# URL = jdbc:mysql://localhost/l2jdb (default)# URL = jdbc:hsqldb:hsql://localhost/l2jdb# URL = jdbc:sqlserver://localhost/database = l2jdb/user = sa/password = URL = jdbc:mysql://localhost/l2jdb# Database user info (default is "root" but it's not recommended)Login = root# Database connection passwordPassword = ***** # Default: 100MaximumDbConnections = 100 # Default: 0MaximumDbIdleTime = 0 # ---------------------------------------------------------------------------# Misc Server Settings# ---------------------------------------------------------------------------# This is the server ID that the Game Server will request.# Example: 1 = Bartz# Default: 1RequestServerID = 65 # True = The Login Server will give an other ID to the server if the requested ID is already reserved.# Default: TrueAcceptAlternateID = True # Datapack root directory.# Defaults to current directory from which the server is started unless the below line is uncommented.#DatapackRoot = C:/Work/tmp/DataPack # Define how many players are allowed to play simultaneously on your server.# Default: 100MaximumOnlineUsers = 100 # Numbers of protocol revisions that server allows to connect.# Delimiter is ;# WARNING: <u><b><font color="red">Changing the protocol revision may result in incompatible communication and many errors in game!</font></b></u># Default: 216AllowedProtocolRevisions = 216  # ---------------------------------------------------------------------------# Misc Player Settings# --------------------------------------------------------------------------- # Character name template.# Examples:# CnameTemplate = [A-Z][a-z]{3,3}[A-Za-z0-9]*# The above setting will allow names with first capital letter, next three small letters,# and any letter (case insensitive) or number, like OmfgWTF1# CnameTemplate = [A-Z][a-z]*# The above setting will allow names only of letters with first one capital, like Omfgwtf# Default .* (allows any symbol)CnameTemplate = .* # This setting restricts names players can give to their pets.# See CnameTemplate for detailsPetNameTemplate = .* # Maximum number of characters per account.# Default: 7 (client limit)CharMaxNumber = 7 

ipconfig.xml

Code: Select all

 <?xml version="1.0" encoding="UTF-8"?><!-- Put old contents of ExternalHostname here, used by default --><gameserver address="201.248.9.87">    <!-- Localhost access -->    <define subnet="127.0.0.0/8" address="127.0.0.1" />    <!-- LAN's, put old contents of InternalHostname here -->    <define subnet="10.0.0.0/8" address="10.0.0.0" />    <define subnet="172.16.0.0/19" address="172.16.0.0" />    <define subnet="192.168.0.0/16" address="192.168.0.0" /></gameserver> 

change your mysql password, and it showed in public and can access it.

I recommend just leaving the port open to the outside, 2106, 7777 and 3306

9014 and 9013 in local network.

Just for home server, use a good firewall to protect your server or PC. (Not used in data centers that may not gain access remotely)

http://www.agnitum.com/products/outpost/

[jurchiks]

3306 is for mysql, shouldn't be open unless you have a site connecting to it from outside.

[Willi2k]

Your configuration should be this:


loginserver.properties

Code: Select all

 # ---------------------------------------------------------------------------# Login Server Settings# ---------------------------------------------------------------------------# This is the server configuration file. Here you can set up the connection information for your server.# This was written with the assumption that you are behind a router.# Dumbed Down Definitions...# LAN (LOCAL area network) - typically consists of computers connected to the same router as you.# WAN (WIDE area network) - typically consists of computers OUTSIDE of your router (ie. the internet).# x.x.x.x - Format of an IP address. Do not include the x'es into settings. Must be real numbers.# ---------------------------------------------------------------------------# Networking# --------------------------------------------------------------------------- # Bind ip of the LoginServer, use * to bind on all available IPs# Default: *LoginserverHostname = * # Default: 2106LoginserverPort = 2106 # The address on which login will listen for GameServers, use * to bind on all available IPs# Default: *LoginHostname = * # The port on which login will listen for GameServers# Default: 9014LoginPort = 9014 # The delay in minutes after which the login updates the gameservers IP's (usefull when their ip is dynamic)# Default: 15IpUpdateTime = 15  # ---------------------------------------------------------------------------# Security# ---------------------------------------------------------------------------# Default: TrueLogLoginController = True # How many times you can provide an invalid account/pass before the IP gets banned.# Default: 10LoginTryBeforeBan = 10 # Time you won't be able to login back again after LoginTryBeforeBan tries to login.# Default: 600 (10 minutes)LoginBlockAfterBan = 600 # If set to True any GameServer can register on your login's free slots# Default: FalseAcceptNewGameServer = False # Enforce GameGuard authorization from client?# If True, login server will kick client if the client bypassed GameGuard authentication.# Default: FalseForceGGAuth = False # Flood Protection. All values are in MILISECONDS.# Default: TrueEnableFloodProtection = True # Default: 15FastConnectionLimit = 15 # Default: 700NormalConnectionTime = 700 # Default: 350FastConnectionTime = 350 # Default: 50MaxConnectionPerIP = 50  # ---------------------------------------------------------------------------# Database# ---------------------------------------------------------------------------# Specify the appropriate driver and url for the database you're using.# Examples:# Driver = com.mysql.jdbc.Driver (default)# Driver = org.hsqldb.jdbcDriver# Driver = com.microsoft.sqlserver.jdbc.SQLServerDriverDriver = com.mysql.jdbc.Driver# Database URL# URL = jdbc:mysql://localhost/l2jdb (default)# URL = jdbc:hsqldb:hsql://localhost/l2jdb# URL = jdbc:sqlserver://localhost/database = l2jdb/user = sa/password = URL = jdbc:mysql://localhost/l2jdb# Database user info (default is "root" but it's not recommended)Login = root# Database connection passwordPassword = ***** # Default: 10MaximumDbConnections = 10 # Default: 0MaximumDbIdleTime = 0  # ---------------------------------------------------------------------------# Misc.# ---------------------------------------------------------------------------# If False, the license (after the login) will not be shown.# Default: TrueShowLicence = True # Default: TrueAutoCreateAccounts = False  # ---------------------------------------------------------------------------# Developer Settings# ---------------------------------------------------------------------------# Default: FalseDebug = False # Default: FalseAssert = False # Default: FalseDeveloper = False 

server.properties

Code: Select all

 # ---------------------------------------------------------------------------# Game Server Settings# ---------------------------------------------------------------------------# This is the server configuration file. Here you can set up the connection information for your server.# This was written with the assumption that you are behind a router.# Dumbed Down Definitions...# LAN (LOCAL area network) - typically consists of computers connected to the same router as you.# WAN (WIDE area network) - typically consists of computers OUTSIDE of your router (ie. the internet).# x.x.x.x - Format of an IP address. Do not include the x'es into settings. Must be real numbers.# ---------------------------------------------------------------------------# Networking# ---------------------------------------------------------------------------## Note: External/Internal address definitions was moved to the ipconfig.xml# # Where's the Login server this gameserver should connect to# Default: 127.0.0.1LoginHost = 127.0.0.1 # TCP port the login server listen to for gameserver connection requests# Default: 9014LoginPort = 9014 # Bind address for gameserver. You should not need to change it in most cases.# Default: * (0.0.0.0)GameserverHostname = * # Default: 7777GameserverPort = 7777  # ---------------------------------------------------------------------------# Database# ---------------------------------------------------------------------------# Specify the appropriate driver and url for the database you're using.# Examples:# Driver = com.mysql.jdbc.Driver (default)# Driver = org.hsqldb.jdbcDriver# Driver = com.microsoft.sqlserver.jdbc.SQLServerDriverDriver = com.mysql.jdbc.Driver# Database URL# URL = jdbc:mysql://localhost/l2jdb (default)# URL = jdbc:hsqldb:hsql://localhost/l2jdb# URL = jdbc:sqlserver://localhost/database = l2jdb/user = sa/password = URL = jdbc:mysql://localhost/l2jdb# Database user info (default is "root" but it's not recommended)Login = root# Database connection passwordPassword = ***** # Default: 100MaximumDbConnections = 100 # Default: 0MaximumDbIdleTime = 0 # ---------------------------------------------------------------------------# Misc Server Settings# ---------------------------------------------------------------------------# This is the server ID that the Game Server will request.# Example: 1 = Bartz# Default: 1RequestServerID = 65 # True = The Login Server will give an other ID to the server if the requested ID is already reserved.# Default: TrueAcceptAlternateID = True # Datapack root directory.# Defaults to current directory from which the server is started unless the below line is uncommented.#DatapackRoot = C:/Work/tmp/DataPack # Define how many players are allowed to play simultaneously on your server.# Default: 100MaximumOnlineUsers = 100 # Numbers of protocol revisions that server allows to connect.# Delimiter is ;# WARNING: <u><b><font color="red">Changing the protocol revision may result in incompatible communication and many errors in game!</font></b></u># Default: 216AllowedProtocolRevisions = 216  # ---------------------------------------------------------------------------# Misc Player Settings# --------------------------------------------------------------------------- # Character name template.# Examples:# CnameTemplate = [A-Z][a-z]{3,3}[A-Za-z0-9]*# The above setting will allow names with first capital letter, next three small letters,# and any letter (case insensitive) or number, like OmfgWTF1# CnameTemplate = [A-Z][a-z]*# The above setting will allow names only of letters with first one capital, like Omfgwtf# Default .* (allows any symbol)CnameTemplate = .* # This setting restricts names players can give to their pets.# See CnameTemplate for detailsPetNameTemplate = .* # Maximum number of characters per account.# Default: 7 (client limit)CharMaxNumber = 7 

ipconfig.xml

Code: Select all

 <?xml version="1.0" encoding="UTF-8"?><!-- Put old contents of ExternalHostname here, used by default --><gameserver address="201.248.9.87">    <!-- Localhost access -->    <define subnet="127.0.0.0/8" address="127.0.0.1" />    <!-- LAN's, put old contents of InternalHostname here -->    <define subnet="10.0.0.0/8" address="10.0.0.0" />    <define subnet="172.16.0.0/19" address="172.16.0.0" />    <define subnet="192.168.0.0/16" address="192.168.0.0" /></gameserver> 

change your mysql password, and it showed in public and can access it.

I recommend just leaving the port open to the outside, 2106, 7777 and 3306

9014 and 9013 in local network.

Just for home server, use a good firewall to protect your server or PC. (Not used in data centers that may not gain access remotely)

http://www.agnitum.com/products/outpost/

don't worry, im just testing and exploring but thanks for the help!

[armura]

# <!-- Put old contents of ExternalHostname here, used by default -->
# <gameserver address="blablabla.no-ip.org">
# <!-- Localhost access -->
# <define subnet="127.0.0.0/8" address="127.0.0.1" />
# <!-- LAN's, put old contents of InternalHostname here -->
# <define subnet="10.0.0.0/8" address="10.0.0.0" />
# <define subnet="172.16.0.0/19" address="172.16.0.0" />
# <define subnet="192.168.0.0/16" address="192.168.0.0" />
# </gameserver>

This configuration can be used? Is correclty?
I cant external connections...

Thanks ^^

[_DS_]

Yes, you can use both symbolic dns names and numbers.

[jurchiks]

Yes, you can use both symbolic dns names and numbers.

you mean IPs and hostnames...?