diff --git a/README.md b/README.md
index a33a0f0..15acc54 100644
--- a/README.md
+++ b/README.md
@@ -45,7 +45,9 @@ Adding `-e READ_ONLY=true` will cause the exports file to contain `ro` instead o
 
 Adding `-e SYNC=true` will cause the exports file to contain `sync` instead of `async`, enabling synchronous mode. Check the exports man page for more information: https://linux.die.net/man/5/exports.
 
-Adding `-e PERMITTED="10.11.99.*"` will permit only hosts with an IP address starting 10.11.99 to mount the file share.
+Adding `-e PERMITTED="10.11.99.0\/24"` will permit only hosts with an IP address starting 10.11.99 to mount the file share. The single backslash is used for escaping the slash dividing net address and netmask during the replacement via sed.
+
+Adding `-e CROSSMNT=yes` will allow to share mounts which are placed in `/some/where/fileshare`. This is especially needed when allowing more than only one IP.
 
 Due to the `fsid=0` parameter set in the **/etc/exports file**, there's no need to specify the folder name when mounting from a client. For example, this works fine even though the folder being mounted and shared is /nfsshare:
 
diff --git a/exports b/exports
index 65f29e0..a090fe2 100644
--- a/exports
+++ b/exports
@@ -1 +1 @@
-{{SHARED_DIRECTORY}} {{PERMITTED}}({{READ_ONLY}},fsid=0,{{SYNC}},no_subtree_check,no_auth_nlm,insecure,no_root_squash)
+{{SHARED_DIRECTORY}} {{PERMITTED}}({{READ_ONLY}},fsid=0,{{SYNC}},{{CROSSMNT}},no_subtree_check,no_auth_nlm,insecure,no_root_squash)
diff --git a/nfsd.sh b/nfsd.sh
index 9faf38f..cfe23cb 100755
--- a/nfsd.sh
+++ b/nfsd.sh
@@ -74,6 +74,16 @@ else
   /bin/sed -i "s/{{SYNC}}/sync/g" /etc/exports
 fi
 
+# Check if the CROSSMNT variable is set (rather than a null string) using parameter expansion
+if [ -z "${CROSSMNT+y}" ]; then
+  echo "The CROSSMNT environment variable is unset or null, so do not allow crossmounts."
+  echo "Mounts in shares will appear empty"
+  /bin/sed -i "s/{{CROSSMNT}},//g" /etc/exports
+else
+  echo "The CROSSMNT environment variable is set, allowing crossmounts."
+  /bin/sed -i "s/{{CROSSMNT}}/crossmnt/g" /etc/exports
+fi
+
 # Partially set 'unofficial Bash Strict Mode' as described here: http://redsymbol.net/articles/unofficial-bash-strict-mode/
 # We don't set -e because the pidof command returns an exit code of 1 when the specified process is not found
 # We expect this at times and don't want the script to be terminated when it occurs