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Sophos SG210, remote SSL VPN users, accessing Azure SQL via UTM to Azure IPSEC tunnel

WABGOR_DAVE

SG210 running 9.715-3 - Transparent mode

Hello all,

I'm trying to get our remote users to be able to access our Azure/tenant SQL instance, as if coming from the office. Presently we have to whitelist a bunch of user IP addresses to let them connect to the AzSQL server.

Note: we're in the midst of migrating to XGs FWs, however it will be a good month to do so.

What I've done so far:

* Established a tunnel from UTM to Azure via IPSEC. On the Azure side I have both the office (10.225.XXX.XXX) and SSL VPN pool (10.242.XXX.XXX) connected.
* Created SNAT rules for SSL VPN Pool traffic attempting to go through the tunnel to appear as coming from the the local UTM IP.
* whitelisted Azure networks and main office IPs within the AzSQL networking side.

Users that are local can connect to the server just fine; any user that is remote at home and connected via SSL VPN receives an error saying there was a timeout trying to connect.  If we do a "What's My IP" when they are connected via VPN it shows the office's public IP.  If we whitelist their own public IP in AzSQL they can connect to SQL without issue.



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  • 0

    Hello there,

    Thanks for reaching out to Sophos Community

    When they are connected on SSL VPN what are the results of traceroute going to AzSQL? Also, are there any deny/drop log from the firewall logs from SSL VPN pool -> AzSQL?

    Many thanks for your time and patience and thank you for choosing Sophos

    Cheers,

    Raphael Alganes
    Community Support Engineer | Sophos Technical Support
    Sophos Support Videos | Product Documentation  |  @SophosSupport  | Sign up for SMS Alerts
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  • 0 in reply to Raphael Alganes

    A little more headway.  The tracert are as follows:

    VPN USER:

    tracing route to <one of MSFT's gateway/keeper IPs where SQL instance resides>

    1  X ms  Y ms Z ms  10.242.2.1         Our SSL POOL IP assigned to them.
    2      *        *        *         Request timed out.
    ...

    30  *        *        *         Request timed out.

    Local user:

    tracing route to <same as above>

    1  X ms  Y ms Z ms  10.225.X.Y         UTM internal LAN IP
    2  X ms  Y ms Z ms  Static IP of WAN Gateway
    3 ... 6   ISP's network
    7... X ms  Y ms Z ms MSFT IPs

    So to my newb eyes it appears that the SSL VPN subnet isn't routing traffic to/through the UTM.....

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  • 0 in reply to Raphael Alganes

    A little more headway.  The tracert are as follows:

    VPN USER:

    tracing route to <one of MSFT's gateway/keeper IPs where SQL instance resides>

    1  X ms  Y ms Z ms  10.242.2.1         Our SSL POOL IP assigned to them.
    2      *        *        *         Request timed out.
    ...

    30  *        *        *         Request timed out.

    Local user:

    tracing route to <same as above>

    1  X ms  Y ms Z ms  10.225.X.Y         UTM internal LAN IP
    2  X ms  Y ms Z ms  Static IP of WAN Gateway
    3 ... 6   ISP's network
    7... X ms  Y ms Z ms MSFT IPs

    So to my newb eyes it appears that the SSL VPN subnet isn't routing traffic to/through the UTM.....

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