Relay device and control method of relay device
First Claim
1. A relay device which connects a local area network to a wide area network, the relay device comprising:
- a processor and a memory storing instructions, the processor executing the stored instructions to;
receive an email destined for a terminal device within the local area network from the wide area network;
determine whether or not an identifier uniquely indicating an available resource through the wide area network is included in the received email;
register the identifier in a database when it is determined that the identifier is included in the email; and
transfer the email to the terminal device within the local area network, the processor further executing the stored instructions to;
detect access from a terminal device within the local area network to a resource available through the wide area network;
determine whether or not an identifier indicating the resource available through the wide area network is registered in the database in response to detection of the access from the terminal device to the available resource;
display a screen inquiring whether to perform the access in the terminal device when it is determined that the identifier is registered in the database; and
relay the access when a reply allowing the access is obtained through the displayed screen.
1 Assignment
0 Petitions
Accused Products
Abstract
An occurrence of virus infection and fraud caused by web access is prevented in advance without any particular restriction. A relay device (10) which connects an in-house LAN (20) to a wide area network (30) includes a URL checker (1510) for determining whether or not a URL is included in an email transmitted to the in-house LAN (20) from the wide area network (30), and registering the URL in a URL database (154d) when the URL is included; and a redirect section (1512) for determining whether or not a URL associated with a corresponding web server is registered in the URL database (154d) in response to detection of access from a terminal device within the in-house LAN (20) to the web server device in the wide area network (30), displaying a redirect screen inquiring whether to perform web access in the terminal device when there is a registered URL, and relaying the web access when an reply allowing the access is obtained.
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Citations
10 Claims
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1. A relay device which connects a local area network to a wide area network, the relay device comprising:
a processor and a memory storing instructions, the processor executing the stored instructions to; receive an email destined for a terminal device within the local area network from the wide area network; determine whether or not an identifier uniquely indicating an available resource through the wide area network is included in the received email; register the identifier in a database when it is determined that the identifier is included in the email; and transfer the email to the terminal device within the local area network, the processor further executing the stored instructions to; detect access from a terminal device within the local area network to a resource available through the wide area network; determine whether or not an identifier indicating the resource available through the wide area network is registered in the database in response to detection of the access from the terminal device to the available resource; display a screen inquiring whether to perform the access in the terminal device when it is determined that the identifier is registered in the database; and relay the access when a reply allowing the access is obtained through the displayed screen. - View Dependent Claims (7, 8, 9, 10)
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2. A relay device which connects a local area network to a wide area network, the relay device comprising:
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a processor and a memory storing instructions, the processor executing the stored instructions to; determine whether or not an identifier uniquely indicating an available resource through the wide area network is included in an email that the local area network receives through the relay device from the wide area network; and register the identifier in a database when it is determined that the identifier is included in the email; and the processor further executing the stored instructions to; detect access from a terminal device within the local area network to a resource available through the wide area network; determine whether or not an identifier indicating the resource available through the wide area network is registered in the database in response to detection of the access from the terminal device to the available resource; display a screen inquiring whether to perform the access in the terminal device when it is determined that the identifier is registered in the database; and relay the access when a reply allowing the access is obtained through the displayed screen, the relay device further comprising; a filter, configured to perform at least a first filtering process, among the first filtering process of filtering an email received in the local area network from the wide area network based on a source email address in the email, and a second filtering process of filtering an email transmitted from the local area network to the wide area network based on a destination email address of the email; and an email address database for storing the source email address or the destination email address of the email which is filtered by the filter, and a terminal identifier indicative of a destination or source terminal device thereof, wherein the redirect section determines whether there is an email that is filtered by the filter with reference to stored content of the email address database, among emails of which a destination or a source is a terminal device that performs access to the available resources through the wide area network, and displays a screen inquiring whether to release a filtering of a source email address with respect to the email that is filtered by the first filtering process in the terminal device, and displays a screen inquiring whether to release a filtering of a destination email address with respect to the email that is filtered by the second filtering process in the terminal device, and updates a filtering condition of the filter in response to an operation for each screen. - View Dependent Claims (3, 4, 5)
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6. A control method of a relay device which connects a local area network to a wide area network, the control method comprising:
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receiving an email destined for a terminal device within the local area network from the wide area network; determining whether or not an identifier uniquely indicating an available resource through the wide area network is included in the received email; registering the identifier in a database when it is determined that the identifier is included in the email; transferring the email to the terminal device within the local area network; detecting access from a terminal device within the local area network to a resource available through the wide area network; determining whether or not an identifier indicating the resource available through the wire area network is registered in the database in response to detection of the access from the terminal device; displaying a screen inquiring whether to perform the access in the terminal device when it is determined that the identifier is registered in the database; and relaying the access when an reply allowing the access is obtained, through the displayed screen.
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Specification