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Getting started with security(I am using Access 2003). I have obtained and attempted to comprehend the MS Access Security FAQ, and have looked at several other guides to implementing security. The one thing that has become apparent is that any number of approaches may be valid. Some guides say to use the wizard; other guides say to avoid them. Some guides say to start by opening any database; other say to start by opening Access, but no database. I could go on, but don't see any point to that. Regarding the FAQ, Microsoft at times advocates approaches shunned by others. For instance, the FAQ describes setting a database password, but does not mention that it is a weak security step (which seems to be the consensus elsewhere). Also, the FAQ metions that "a second bug has recently emerged" that affects Access 95 and 97 security. This has never been updated in the FAQ, which tends to make me skeptical about the rest of the information, which for all I know is similarly outdated. Bottom line is that I am bewildered by choices before I have completed step 1. Here's what I have so far: 1) Jack MacDonald's paper seems to be a thorough explanation, but is a little hard to follow since theory and instructions are intermixed. Joan Wilds's step-by-step document is helpful, as is Lynn Trapp's Ten Steps, for a point-by-point summary, even though some details differ (which leads me to the next observation). 2) I can either start by opening Access and no database, or Access and any database. 3) I should create workgroups, and join them as needed for single sessions; custom shortcuts can implement this for specific databases. 4) Permissions should be assigned per group; users will have permissions based on the groups to which they belong. The eventual plan is to have split databases and individual front ends. Questions: 1) Should each user's computer have their own copy of the relevant workgroup information files? I believe this to be so, in which case the next three questions are relevant. 2) If so, does this file need to be updated for all users if, for instance, a new user joins a group, or will the old file continue to work for a user who is unaffected by the change? 3) Even if it is not necessary to update the file for all users, is it nevertheless recommnded practice? 4) Is the default location for the system.mdw file as good a place as any for new workgroup information files? 5) Can I rely on the security wizard in Access 2003? Some of the control wizards continue to use DoMenuItem commands in VBA, so I am moderately suspicious of the wizards in general. 6) Am I missing anything obvious so far, and is there something I have not mentioned that will make the process easier? > 3) I should create workgroups, and join them as needed for single The recommended practice is to join the default system.mdw file that ships > sessions; custom shortcuts can implement this for specific databases. with Access and use custom shortcuts for all secure databases. > 1) Should each user's computer have their own copy of the relevant NO, there should only be one copy of the secure workgroup information file > workgroup information files? I believe this to be so, in which case the > next three questions are relevant. and all users of a given database should link to it through the custom shortcut. Doing what you suggest can lead to an administrative nightmare, depending on the number of users you have. > 2) If so, does this file need to be updated for all users if, for Obviously, I don't recommend that approach, but if you did you should update > instance, a new user joins a group, or will the old file continue to work > for a user who is unaffected by the change? all copies so that they match. > 3) Even if it is not necessary to update the file for all users, is it See Above!> nevertheless recommnded practice? > 4) Is the default location for the system.mdw file as good a place as any NO. Your secure.mdw file should be on a server accessable to all users. the > for new workgroup information files? default system.mdw file is on each user's hard drive. > 5) Can I rely on the security wizard in Access 2003? Some of the control From all that I know you can trust the security Wizard in 2003. It's > wizards continue to use DoMenuItem commands in VBA, so I am moderately > suspicious of the wizards in general. probably the best wizard for security so far. > 6) Am I missing anything obvious so far, and is there something I have not Nothing sticks out. Ask more questions if you need.> mentioned that will make the process easier? Thanks for the reply. I have interspersed a few more questions and comments
inline, but I think I am ready to jump back in with the answers you have already provided. I expect more questions will arise as I proceed, but I can get started with reasonable confidence now. "Lynn Trapp" <ltrappNoSpam@ltcomputerdesigns.com> wrote in message I think I used terminology incorrectly. I didn't mean the user would join a news:%23rm2FKjEHHA.992@TK2MSFTNGP03.phx.gbl... >> 3) I should create workgroups, and join them as needed for single >> sessions; custom shortcuts can implement this for specific databases. > > The recommended practice is to join the default system.mdw file that ships > with Access and use custom shortcuts for all secure databases. group, but rather that the user would go through a particular information file to open a secured database. The custom shortcut would contain the path to the appropriate information file, as I understand it. I don't know how to describe this, but I realize I used incorrect terminology in referring to it as joining a group, which from what I can tell is administered by a user with sufficient permissions. > This is the quote I saw by following a link from a site to which I linked >> 1) Should each user's computer have their own copy of the relevant >> workgroup information files? I believe this to be so, in which case the >> next three questions are relevant. > > NO, there should only be one copy of the secure workgroup information file > and all users of a given database should link to it through the custom > shortcut. Doing what you suggest can lead to an administrative nightmare, > depending on the number of users you have. from your site: "We ... recommend that the security file is copied to each workstation, as we discovered that corruption of the security file was a common situation with large numbers of users homed on a single security file located on the server." The article went on to suggest that the appropriate file could be copied to each user's computer by way of a logon script. In my situation I think it unlikely there will be more than 20 users for a database; in most cases the number will be considerably less, and more than two or three concurrent users would probably be uncommon. Even if corruption of the security file is a "common situation" with a "large number" of users, "common" and "large" are imprecise terms, so it is difficult to judge the relevance of the suggestion to my situation. I don't want to try administering a batch of separate security information files, so will avoid doing so if using a single (backed-up) file is a reasonable approach, which it seems to be. Do I understand that I could use the same security information file for several databases, or would I do better to create a different information file if the composition of the groups changes from one database to another? Show quoteHide quote > >> 2) If so, does this file need to be updated for all users if, for >> instance, a new user joins a group, or will the old file continue to work >> for a user who is unaffected by the change? > > Obviously, I don't recommend that approach, but if you did you should > update all copies so that they match. > >> 3) Even if it is not necessary to update the file for all users, is it >> nevertheless recommnded practice? > > See Above! > >> 4) Is the default location for the system.mdw file as good a place as any >> for new workgroup information files? > > NO. Your secure.mdw file should be on a server accessable to all users. > the default system.mdw file is on each user's hard drive. > >> 5) Can I rely on the security wizard in Access 2003? Some of the control >> wizards continue to use DoMenuItem commands in VBA, so I am moderately >> suspicious of the wizards in general. > > From all that I know you can trust the security Wizard in 2003. It's > probably the best wizard for security so far. > > >> 6) Am I missing anything obvious so far, and is there something I have >> not mentioned that will make the process easier? > > Nothing sticks out. Ask more questions if you need. > > -- > > Lynn Trapp > Microsoft MVP (Access) > www.ltcomputerdesigns.com > > > This is the quote I saw by following a link from a site to which I linked I'm not sure what article that came from, but I have never seen a large > from your site: > "We ... recommend that the security file is copied to each workstation, as > we discovered that corruption of the security file was a common situation > with large numbers of users homed on a single security file located on the > server." degree of corruption to a .mdw file when it was housed on a single server. My previous company had hundreds of databases linked to the same .mdw file and I only remember 2 occasions of corruption in the .mdw file in over 7 years. The corruption is easily fixed. > Do I understand that I could use the same security information file for Yes, you can use the same .mdw file for as many databases as you want. The > several databases, or would I do better to create a different information > file if the composition of the groups changes from one database to > another? ..mdw file stores the authentication information for groups and users. The permissions are stored in the .mdb file, so the stress on the .mdw file is minimal. This is the link (which I discovered by way of a link on Jack MacDonald's
site): http://www.access-experts.com/default.aspx?selection=TutorialSecurity&sm=18 Perhaps I misunderstood the comments there. Thanks for clearing up the questions about using a single mdw file. I will go ahead and do it that way in confidence that it is a reasonable approach. It has taken a while for me to wrap my mind around the concept of the security file storing group and user authentication information, while the actual permissions are stored in the mdb file. Show quoteHide quote "Lynn Trapp" <ltrappNoSpam@ltcomputerdesigns.com> wrote in message news:u2FjNvjEHHA.4928@TK2MSFTNGP02.phx.gbl... >> This is the quote I saw by following a link from a site to which I linked >> from your site: >> "We ... recommend that the security file is copied to each workstation, >> as we discovered that corruption of the security file was a common >> situation with large numbers of users homed on a single security file >> located on the server." > > I'm not sure what article that came from, but I have never seen a large > degree of corruption to a .mdw file when it was housed on a single server. > My previous company had hundreds of databases linked to the same .mdw file > and I only remember 2 occasions of corruption in the .mdw file in over 7 > years. The corruption is easily fixed. > >> Do I understand that I could use the same security information file for >> several databases, or would I do better to create a different information >> file if the composition of the groups changes from one database to >> another? > > Yes, you can use the same .mdw file for as many databases as you want. The > .mdw file stores the authentication information for groups and users. The > permissions are stored in the .mdb file, so the stress on the .mdw file is > minimal. > > > -- > > Lynn Trapp > Microsoft MVP (Access) > www.ltcomputerdesigns.com > > > This is the link (which I discovered by way of a link on Jack MacDonald's I've never seen that site before, but it looks quite accessible. They do > site): > http://www.access-experts.com/default.aspx?selection=TutorialSecurity&sm=18 > Perhaps I misunderstood the comments there. > > Thanks for clearing up the questions about using a single mdw file. I > will go ahead and do it that way in confidence that it is a reasonable > approach. It has taken a while for me to wrap my mind around the concept > of the security file storing group and user authentication information, > while the actual permissions are stored in the mdb file. advertise a product called DBLauncher that might be helpful, but I still don't know where they get their information about corrupt .mdw files. That does not accord with my first hand experience in working with hundreds of Access databases hitting the same .mdw file. Holler back if you have further questions. There's definitely some good stuff ont he site. My best guess regarding
copies of the mdw file is that the idea is to have users set their passwords using the file on the server, then to copy it each day to each individual computer, so that passwords are not lost, but I am comfortable with the general consensus that corruption of the mdw file on the server is not a big concern, and that even if it occurs recovery needs not be a big deal. Show quoteHide quote "Lynn Trapp" <ltrappNoSpam@ltcomputerdesigns.com> wrote in message news:urH%23t8jEHHA.4024@TK2MSFTNGP04.phx.gbl... >> This is the link (which I discovered by way of a link on Jack MacDonald's >> site): >> http://www.access-experts.com/default.aspx?selection=TutorialSecurity&sm=18 >> Perhaps I misunderstood the comments there. >> >> Thanks for clearing up the questions about using a single mdw file. I >> will go ahead and do it that way in confidence that it is a reasonable >> approach. It has taken a while for me to wrap my mind around the concept >> of the security file storing group and user authentication information, >> while the actual permissions are stored in the mdb file. > > I've never seen that site before, but it looks quite accessible. They do > advertise a product called DBLauncher that might be helpful, but I still > don't know where they get their information about corrupt .mdw files. That > does not accord with my first hand experience in working with hundreds of > Access databases hitting the same .mdw file. > > Holler back if you have further questions. > > -- > > Lynn Trapp > Microsoft MVP (Access) > www.ltcomputerdesigns.com > > If I may add to Lynn's response, you don't really want to have each user
with their own copy of the mdw. Their password is stored in it, and you'll overwrite their password if/when you copy an updated mdw to their computer. I too have rarely seen corruption in a mdw that wasn't recoverable (you are backing it up, right). -- Show quoteHide quoteJoan Wild Microsoft Access MVP BruceM wrote: > Thanks for the reply. I have interspersed a few more questions and > comments inline, but I think I am ready to jump back in with the > answers you have already provided. I expect more questions will > arise as I proceed, but I can get started with reasonable confidence > now. > "Lynn Trapp" <ltrappNoSpam@ltcomputerdesigns.com> wrote in message > news:%23rm2FKjEHHA.992@TK2MSFTNGP03.phx.gbl... >>> 3) I should create workgroups, and join them as needed for single >>> sessions; custom shortcuts can implement this for specific >>> databases. >> >> The recommended practice is to join the default system.mdw file that >> ships with Access and use custom shortcuts for all secure databases. > > I think I used terminology incorrectly. I didn't mean the user would > join a group, but rather that the user would go through a particular > information file to open a secured database. The custom shortcut > would contain the path to the appropriate information file, as I > understand it. I don't know how to describe this, but I realize I > used incorrect terminology in referring to it as joining a group, > which from what I can tell is administered by a user with sufficient > permissions. >> >>> 1) Should each user's computer have their own copy of the relevant >>> workgroup information files? I believe this to be so, in which >>> case the next three questions are relevant. >> >> NO, there should only be one copy of the secure workgroup >> information file and all users of a given database should link to it >> through the custom shortcut. Doing what you suggest can lead to an >> administrative nightmare, depending on the number of users you have. > > This is the quote I saw by following a link from a site to which I > linked from your site: > "We ... recommend that the security file is copied to each > workstation, as we discovered that corruption of the security file > was a common situation with large numbers of users homed on a single > security file located on the server." > The article went on to suggest that the appropriate file could be > copied to each user's computer by way of a logon script. In my > situation I think it unlikely there will be more than 20 users for a > database; in most cases the number will be considerably less, and > more than two or three concurrent users would probably be uncommon. Even > if corruption of the security file is a "common situation" with > a "large number" of users, "common" and "large" are imprecise terms, > so it is difficult to judge the relevance of the suggestion to my > situation. I don't want to try administering a batch of separate security > information files, so will avoid doing so if using a single > (backed-up) file is a reasonable approach, which it seems to be. > Do I understand that I could use the same security information file > for several databases, or would I do better to create a different > information file if the composition of the groups changes from one > database to another? >> >>> 2) If so, does this file need to be updated for all users if, for >>> instance, a new user joins a group, or will the old file continue >>> to work for a user who is unaffected by the change? >> >> Obviously, I don't recommend that approach, but if you did you should >> update all copies so that they match. >> >>> 3) Even if it is not necessary to update the file for all users, is >>> it nevertheless recommnded practice? >> >> See Above! >> >>> 4) Is the default location for the system.mdw file as good a place >>> as any for new workgroup information files? >> >> NO. Your secure.mdw file should be on a server accessable to all >> users. the default system.mdw file is on each user's hard drive. > >> >>> 5) Can I rely on the security wizard in Access 2003? Some of the >>> control wizards continue to use DoMenuItem commands in VBA, so I am >>> moderately suspicious of the wizards in general. >> >> From all that I know you can trust the security Wizard in 2003. It's >> probably the best wizard for security so far. >> >> >>> 6) Am I missing anything obvious so far, and is there something I >>> have not mentioned that will make the process easier? >> >> Nothing sticks out. Ask more questions if you need. >> >> -- >> >> Lynn Trapp >> Microsoft MVP (Access) >> www.ltcomputerdesigns.com I just realized that the link to Jack MacDonald's site that I referenced
earlier in this thread was from your site, not from Lynn's. I'm just trying to be as accurate as is possible, even if the earlier inaccuracy is probably not all that significant. Thanks for pointing out about the password being stored in the mdw file. I had overlooked that. I back up regularly, sometimes several times a day when working on a project. Show quoteHide quote "Joan Wild" <jwild@nospamtyenet.com> wrote in message news:OHjRU5jEHHA.4380@TK2MSFTNGP04.phx.gbl... > If I may add to Lynn's response, you don't really want to have each user > with their own copy of the mdw. Their password is stored in it, and > you'll overwrite their password if/when you copy an updated mdw to their > computer. I too have rarely seen corruption in a mdw that wasn't > recoverable (you are backing it up, right). > > -- > Joan Wild > Microsoft Access MVP > > BruceM wrote: >> Thanks for the reply. I have interspersed a few more questions and >> comments inline, but I think I am ready to jump back in with the >> answers you have already provided. I expect more questions will >> arise as I proceed, but I can get started with reasonable confidence >> now. >> "Lynn Trapp" <ltrappNoSpam@ltcomputerdesigns.com> wrote in message >> news:%23rm2FKjEHHA.992@TK2MSFTNGP03.phx.gbl... >>>> 3) I should create workgroups, and join them as needed for single >>>> sessions; custom shortcuts can implement this for specific >>>> databases. >>> >>> The recommended practice is to join the default system.mdw file that >>> ships with Access and use custom shortcuts for all secure databases. >> >> I think I used terminology incorrectly. I didn't mean the user would >> join a group, but rather that the user would go through a particular >> information file to open a secured database. The custom shortcut >> would contain the path to the appropriate information file, as I >> understand it. I don't know how to describe this, but I realize I >> used incorrect terminology in referring to it as joining a group, >> which from what I can tell is administered by a user with sufficient >> permissions. >>> >>>> 1) Should each user's computer have their own copy of the relevant >>>> workgroup information files? I believe this to be so, in which >>>> case the next three questions are relevant. >>> >>> NO, there should only be one copy of the secure workgroup >>> information file and all users of a given database should link to it >>> through the custom shortcut. Doing what you suggest can lead to an >>> administrative nightmare, depending on the number of users you have. >> >> This is the quote I saw by following a link from a site to which I >> linked from your site: >> "We ... recommend that the security file is copied to each >> workstation, as we discovered that corruption of the security file >> was a common situation with large numbers of users homed on a single >> security file located on the server." >> The article went on to suggest that the appropriate file could be >> copied to each user's computer by way of a logon script. In my >> situation I think it unlikely there will be more than 20 users for a >> database; in most cases the number will be considerably less, and >> more than two or three concurrent users would probably be uncommon. Even >> if corruption of the security file is a "common situation" with >> a "large number" of users, "common" and "large" are imprecise terms, >> so it is difficult to judge the relevance of the suggestion to my >> situation. I don't want to try administering a batch of separate security >> information files, so will avoid doing so if using a single >> (backed-up) file is a reasonable approach, which it seems to be. >> Do I understand that I could use the same security information file >> for several databases, or would I do better to create a different >> information file if the composition of the groups changes from one >> database to another? >>> >>>> 2) If so, does this file need to be updated for all users if, for >>>> instance, a new user joins a group, or will the old file continue >>>> to work for a user who is unaffected by the change? >>> >>> Obviously, I don't recommend that approach, but if you did you should >>> update all copies so that they match. >>> >>>> 3) Even if it is not necessary to update the file for all users, is >>>> it nevertheless recommnded practice? >>> >>> See Above! >>> >>>> 4) Is the default location for the system.mdw file as good a place >>>> as any for new workgroup information files? >>> >>> NO. Your secure.mdw file should be on a server accessable to all >>> users. the default system.mdw file is on each user's hard drive. >> >>> >>>> 5) Can I rely on the security wizard in Access 2003? Some of the >>>> control wizards continue to use DoMenuItem commands in VBA, so I am >>>> moderately suspicious of the wizards in general. >>> >>> From all that I know you can trust the security Wizard in 2003. It's >>> probably the best wizard for security so far. >>> >>> >>>> 6) Am I missing anything obvious so far, and is there something I >>>> have not mentioned that will make the process easier? >>> >>> Nothing sticks out. Ask more questions if you need. >>> >>> -- >>> >>> Lynn Trapp >>> Microsoft MVP (Access) >>> www.ltcomputerdesigns.com > > BruceM wrote:
> I'm just trying to be as accurate as is possible, even if While we do hammer pretty hard about following every step and in order, > the earlier inaccuracy is probably not all that significant. there are some subtle changes in order that won't matter. However, most people get security wrong, and it's because they skip (what turns out to be) an important step, or do things in the wrong order. It sounds to me that you have a good handle on how security works. Once you have it down and understand it, you'll recognise that these don't matter. As far as using a single secure mdw or copying to the users, if you understand where/when it matters then either method is OK - there is no 'right' answer. If you lock down the database so that users can't get to the 'change password' dialog, or you don't provide them with a method to change their password, then copying the secure mdw to their local computer won't matter. -- Joan Wild Microsoft Access MVP > As far as using a single secure mdw or copying to the users, if you Just for the record, most of my installations do this (mdw for each user) "by> understand where/when it matters then either method is OK - there is no > 'right' answer. default", simply because The Developer Runtime Setup (PDW-Package & Deployment Wizard) HAS no multi-user provisions! There are better 3rd Party installers, I am told. And I understand that the user cannot change passwords (realistically) if there is more than one copy of the mdw. It is a difficulty which arises with MS PDW Setups in multi-user. I remain perfect, of course ;-)) Chris
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New Problem that I need help with Interesting "Locked In" Problem I don't like the MDW file Permissions with linked tables Encode/Decode Data Base Firewall and FTP login issue Error 7399 When trying to link an Access database to SqlServer 2K Error 0x80040E4D when tryng to open an password protected Access database programmatically URGENT HELP REQUIRED |
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