Archive for the 'Open Source' Category

As SurGATE Labs team, we created a small patch to hide ip address of authenticated user for qmail.

For easy configuration we defined HIDECLIENTIP environment variable to enable/disable this feature without re-compiling qmail source code.

Usage:

1.  Copy the following patch lines into a file called qmail-hideip.patch Apply the following patch to netqmail
   # cd netqmail-version
   # patch < qmail-hideip.patch
   #make
2. Stop qmail, take backup of qmail-smtpd and copy new qmail-smtpd binary to /var/qmail/bin
3. Add HIDECLIENTIP variable into tcp.smtp(or any other tcprules file to create cdb file defined in qmail-smtpd/run) and run create new tcp.smtp.cdb file
   Example:
   Before:
   :allow
   After:
   :allow,HIDECLIENTIP=”"

# diff -ruN received.c.orig received.c
--- received.c.orig     2011-09-12 23:24:56.222336786 +0300
+++ received.c  2011-09-12 23:28:01.807343584 +0300
@@ -21,6 +21,9 @@
return 0;
}

+char *relayclient;
+char *hideip;
+
void safeput(qqt,s)
struct qmail *qqt;
char *s;
@@ -60,7 +63,17 @@
safeput(qqt,remoteinfo);
qmail_puts(qqt,"@");
}
+ hideip = env_get("HIDECLIENTIP");
+ if(hideip) {
+        relayclient = env_get("RELAYCLIENT");
+        if (relayclient)
+                 qmail_puts(qqt,"Authenticated User");
+         else
+               safeput(qqt,remoteip);
+}
+ else
safeput(qqt,remoteip);

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