Revert "proxy: Remove AUTH_IPCACHE_TTL"

This reverts commit dc637f087fe07ab26ae1dee00133da69bab5e6a1.

Rationale: "authenticate_ip_ttl" can be safely used as it does not
introduces an authentication bypass, but saves relationships between
successfully authenticated users and their IP addresses.

"max_user_ip" depends on such an authentication cache, so credential
sharing between several IPs (on purpose or by chance) can be detected
properly. This is useful in case of crompromised machines and/or
attackers in internal networks having stolen proxy authentication
credentials.

Quoted from squid.conf.documented or man 5 squid.conf:

>       acl aclname max_user_ip [-s] number
>         # This will be matched when the user attempts to log in from more
>         # than <number> different ip addresses. The authenticate_ip_ttl
>         # parameter controls the timeout on the ip entries. [fast]
>         # If -s is specified the limit is strict, denying browsing
>         # from any further IP addresses until the ttl has expired. Without
>         # -s Squid will just annoy the user by "randomly" denying requests.
>         # (the counter is reset each time the limit is reached and a
>         # request is denied)
>         # NOTE: in acceleration mode or where there is mesh of child proxies,
>         # clients may appear to come from multiple addresses if they are
>         # going through proxy farms, so a limit of 1 may cause user problems.

Fixes: #11994
Cc: Michael Tremer <michael.tremer@ipfire.org>
Signed-off-by: Peter Müller <peter.mueller@ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>

diff --git a/doc/language_issues.de b/doc/language_issues.de
index 2dc986d0a3a071e85e69583d82ea08b18764e976..f2d628d51badd349f842f38e1f9446850394d515 100644 (file)
--- a/doc/language_issues.de
+++ b/doc/language_issues.de
@@ -48,7 +48,6 @@ WARNING: translation string unused: admin user password has been changed
 WARNING: translation string unused: administrator user password
 WARNING: translation string unused: adsl settings
 WARNING: translation string unused: advproxy AUTH method ntlm
-WARNING: translation string unused: advproxy AUTH user IP cache TTL
 WARNING: translation string unused: advproxy LDAP auth
 WARNING: translation string unused: advproxy NTLM BDC hostname
 WARNING: translation string unused: advproxy NTLM PDC hostname
@@ -73,8 +72,6 @@ WARNING: translation string unused: advproxy chgwebpwd new password
 WARNING: translation string unused: advproxy chgwebpwd new password confirm
 WARNING: translation string unused: advproxy chgwebpwd old password
 WARNING: translation string unused: advproxy chgwebpwd username
-WARNING: translation string unused: advproxy content based throttling
-WARNING: translation string unused: advproxy errmsg auth ipcache ttl
 WARNING: translation string unused: advproxy errmsg change fail
 WARNING: translation string unused: advproxy errmsg change success
 WARNING: translation string unused: advproxy errmsg invalid bdc

diff --git a/doc/language_issues.en b/doc/language_issues.en
index 88fa6ed7921b1ab09153c912bae8cce9b7cb84e8..76c4237d4871233d23ee6f60f017c8655b9bc151 100644 (file)
--- a/doc/language_issues.en
+++ b/doc/language_issues.en
@@ -128,6 +128,7 @@ WARNING: untranslated string: advproxy AUTH method radius = RADIUS
 WARNING: untranslated string: advproxy AUTH no auth = Domains without authentication (one per line)
 WARNING: untranslated string: advproxy AUTH number of auth processes = Number of authentication processes
 WARNING: untranslated string: advproxy AUTH realm = Authentication realm prompt
+WARNING: untranslated string: advproxy AUTH user IP cache TTL = User/IP cache TTL (in minutes)
 WARNING: untranslated string: advproxy IDENT authorized users = Authorized users (one per line)
 WARNING: untranslated string: advproxy IDENT aware hosts = Ident aware hosts (one per line)
 WARNING: untranslated string: advproxy IDENT identd settings = Common identd settings
@@ -206,6 +207,7 @@ WARNING: untranslated string: advproxy errmsg acl cannot be empty = Access contr
 WARNING: untranslated string: advproxy errmsg auth cache ttl = Invalid value for authentication cache TTL
 WARNING: untranslated string: advproxy errmsg auth children = Invalid number of authentication processes
 WARNING: untranslated string: advproxy errmsg auth ipcache may not be null = Authentication cache TTL may not be 0 when using IP address limits
+WARNING: untranslated string: advproxy errmsg auth ipcache ttl = Invalid value for user/IP cache TTL
 WARNING: untranslated string: advproxy errmsg cache = The RAM cache size is greater than the harddisk cache size:
 WARNING: untranslated string: advproxy errmsg hdd cache size = Invalid value for harddisk cache size (min 10 MB required)
 WARNING: untranslated string: advproxy errmsg ident timeout = Invalid ident timeout

diff --git a/doc/language_issues.es b/doc/language_issues.es
index ef78d6680d81589b19332498d2bc1d2e70eaa38c..4d74fe91ba9c235f86bf4d41e5d9c28f9574a7dc 100644 (file)
--- a/doc/language_issues.es
+++ b/doc/language_issues.es
@@ -24,7 +24,6 @@ WARNING: translation string unused: add xtaccess
 WARNING: translation string unused: add-route
 WARNING: translation string unused: admin user password has been changed
 WARNING: translation string unused: administrator user password
-WARNING: translation string unused: advproxy AUTH user IP cache TTL
 WARNING: translation string unused: advproxy LDAP auth
 WARNING: translation string unused: advproxy NTLM BDC hostname
 WARNING: translation string unused: advproxy NTLM PDC hostname
@@ -49,8 +48,6 @@ WARNING: translation string unused: advproxy chgwebpwd new password
 WARNING: translation string unused: advproxy chgwebpwd new password confirm
 WARNING: translation string unused: advproxy chgwebpwd old password
 WARNING: translation string unused: advproxy chgwebpwd username
-WARNING: translation string unused: advproxy content based throttling
-WARNING: translation string unused: advproxy errmsg auth ipcache ttl
 WARNING: translation string unused: advproxy errmsg change fail
 WARNING: translation string unused: advproxy errmsg change success
 WARNING: translation string unused: advproxy errmsg invalid bdc
@@ -900,7 +897,7 @@ WARNING: untranslated string: fireinfo please enable = Please enable the fireinf
 WARNING: untranslated string: fireinfo settings = Fireinfo settings
 WARNING: untranslated string: fireinfo system version = System versions
 WARNING: untranslated string: fireinfo why descr1 = It is very important for the development of IPFire that you enable this
-WARNING: untranslated string: fireinfo why descr2 = service. 
+WARNING: untranslated string: fireinfo why descr2 = service.
 WARNING: untranslated string: fireinfo why enable = Why should I enable fireinfo?
 WARNING: untranslated string: fireinfo why read more = Read more about the reasons.
 WARNING: untranslated string: fireinfo your profile id = Your profile ID
@@ -958,7 +955,7 @@ WARNING: untranslated string: fwdfw err tgt_port = Invalid destination port.
 WARNING: untranslated string: fwdfw err time = You have to select at least one day.
 WARNING: untranslated string: fwdfw external port nat = External port (NAT)
 WARNING: untranslated string: fwdfw hint ip1 = The last generated rule may never match, because source and destination subnets may overlap.
-WARNING: untranslated string: fwdfw hint ip2 = Please double-check if this rule makes sense: 
+WARNING: untranslated string: fwdfw hint ip2 = Please double-check if this rule makes sense:
 WARNING: untranslated string: fwdfw hint mac = The destination group contains MAC addresses, which will be skipped during rule creation.
 WARNING: untranslated string: fwdfw iface = Interface
 WARNING: untranslated string: fwdfw limitconcon = Limit concurrent connections per IP address

diff --git a/doc/language_issues.fr b/doc/language_issues.fr
index fd10b171e9ad86a95fe5eb02a9045ccf123000c6..c5953d5bacb8012937ce24bc5f4296313e1b7248 100644 (file)
--- a/doc/language_issues.fr
+++ b/doc/language_issues.fr
@@ -52,7 +52,6 @@ WARNING: translation string unused: admin user password has been changed
 WARNING: translation string unused: administrator user password
 WARNING: translation string unused: adsl settings
 WARNING: translation string unused: advproxy AUTH method ntlm
-WARNING: translation string unused: advproxy AUTH user IP cache TTL
 WARNING: translation string unused: advproxy LDAP auth
 WARNING: translation string unused: advproxy NTLM BDC hostname
 WARNING: translation string unused: advproxy NTLM PDC hostname
@@ -77,8 +76,6 @@ WARNING: translation string unused: advproxy chgwebpwd new password
 WARNING: translation string unused: advproxy chgwebpwd new password confirm
 WARNING: translation string unused: advproxy chgwebpwd old password
 WARNING: translation string unused: advproxy chgwebpwd username
-WARNING: translation string unused: advproxy content based throttling
-WARNING: translation string unused: advproxy errmsg auth ipcache ttl
 WARNING: translation string unused: advproxy errmsg change fail
 WARNING: translation string unused: advproxy errmsg change success
 WARNING: translation string unused: advproxy errmsg invalid bdc

diff --git a/doc/language_issues.it b/doc/language_issues.it
index 16ff776b52c46443a96abd5edc9388ee5814cdaa..059c73a59a8f87ab42b26d38836424318928d8ac 100644 (file)
--- a/doc/language_issues.it
+++ b/doc/language_issues.it
@@ -26,7 +26,6 @@ WARNING: translation string unused: add-route
 WARNING: translation string unused: admin user password has been changed
 WARNING: translation string unused: administrator user password
 WARNING: translation string unused: advproxy AUTH method ntlm
-WARNING: translation string unused: advproxy AUTH user IP cache TTL
 WARNING: translation string unused: advproxy LDAP auth
 WARNING: translation string unused: advproxy NTLM BDC hostname
 WARNING: translation string unused: advproxy NTLM PDC hostname
@@ -51,8 +50,6 @@ WARNING: translation string unused: advproxy chgwebpwd new password
 WARNING: translation string unused: advproxy chgwebpwd new password confirm
 WARNING: translation string unused: advproxy chgwebpwd old password
 WARNING: translation string unused: advproxy chgwebpwd username
-WARNING: translation string unused: advproxy content based throttling
-WARNING: translation string unused: advproxy errmsg auth ipcache ttl
 WARNING: translation string unused: advproxy errmsg change fail
 WARNING: translation string unused: advproxy errmsg change success
 WARNING: translation string unused: advproxy errmsg invalid bdc

diff --git a/doc/language_issues.nl b/doc/language_issues.nl
index 328a8e1f25b45ebab87b44a80dd8f47f42b3bdef..8a79baa83291841e315666dc9e76b0f66f9cf37e 100644 (file)
--- a/doc/language_issues.nl
+++ b/doc/language_issues.nl
@@ -25,7 +25,6 @@ WARNING: translation string unused: add xtaccess
 WARNING: translation string unused: add-route
 WARNING: translation string unused: admin user password has been changed
 WARNING: translation string unused: administrator user password
-WARNING: translation string unused: advproxy AUTH user IP cache TTL
 WARNING: translation string unused: advproxy LDAP auth
 WARNING: translation string unused: advproxy NTLM BDC hostname
 WARNING: translation string unused: advproxy NTLM PDC hostname
@@ -50,8 +49,6 @@ WARNING: translation string unused: advproxy chgwebpwd new password
 WARNING: translation string unused: advproxy chgwebpwd new password confirm
 WARNING: translation string unused: advproxy chgwebpwd old password
 WARNING: translation string unused: advproxy chgwebpwd username
-WARNING: translation string unused: advproxy content based throttling
-WARNING: translation string unused: advproxy errmsg auth ipcache ttl
 WARNING: translation string unused: advproxy errmsg change fail
 WARNING: translation string unused: advproxy errmsg change success
 WARNING: translation string unused: advproxy errmsg invalid bdc

diff --git a/doc/language_issues.pl b/doc/language_issues.pl
index ef78d6680d81589b19332498d2bc1d2e70eaa38c..4d74fe91ba9c235f86bf4d41e5d9c28f9574a7dc 100644 (file)
--- a/doc/language_issues.pl
+++ b/doc/language_issues.pl
@@ -24,7 +24,6 @@ WARNING: translation string unused: add xtaccess
 WARNING: translation string unused: add-route
 WARNING: translation string unused: admin user password has been changed
 WARNING: translation string unused: administrator user password
-WARNING: translation string unused: advproxy AUTH user IP cache TTL
 WARNING: translation string unused: advproxy LDAP auth
 WARNING: translation string unused: advproxy NTLM BDC hostname
 WARNING: translation string unused: advproxy NTLM PDC hostname
@@ -49,8 +48,6 @@ WARNING: translation string unused: advproxy chgwebpwd new password
 WARNING: translation string unused: advproxy chgwebpwd new password confirm
 WARNING: translation string unused: advproxy chgwebpwd old password
 WARNING: translation string unused: advproxy chgwebpwd username
-WARNING: translation string unused: advproxy content based throttling
-WARNING: translation string unused: advproxy errmsg auth ipcache ttl
 WARNING: translation string unused: advproxy errmsg change fail
 WARNING: translation string unused: advproxy errmsg change success
 WARNING: translation string unused: advproxy errmsg invalid bdc
@@ -900,7 +897,7 @@ WARNING: untranslated string: fireinfo please enable = Please enable the fireinf
 WARNING: untranslated string: fireinfo settings = Fireinfo settings
 WARNING: untranslated string: fireinfo system version = System versions
 WARNING: untranslated string: fireinfo why descr1 = It is very important for the development of IPFire that you enable this
-WARNING: untranslated string: fireinfo why descr2 = service. 
+WARNING: untranslated string: fireinfo why descr2 = service.
 WARNING: untranslated string: fireinfo why enable = Why should I enable fireinfo?
 WARNING: untranslated string: fireinfo why read more = Read more about the reasons.
 WARNING: untranslated string: fireinfo your profile id = Your profile ID
@@ -958,7 +955,7 @@ WARNING: untranslated string: fwdfw err tgt_port = Invalid destination port.
 WARNING: untranslated string: fwdfw err time = You have to select at least one day.
 WARNING: untranslated string: fwdfw external port nat = External port (NAT)
 WARNING: untranslated string: fwdfw hint ip1 = The last generated rule may never match, because source and destination subnets may overlap.
-WARNING: untranslated string: fwdfw hint ip2 = Please double-check if this rule makes sense: 
+WARNING: untranslated string: fwdfw hint ip2 = Please double-check if this rule makes sense:
 WARNING: untranslated string: fwdfw hint mac = The destination group contains MAC addresses, which will be skipped during rule creation.
 WARNING: untranslated string: fwdfw iface = Interface
 WARNING: untranslated string: fwdfw limitconcon = Limit concurrent connections per IP address

diff --git a/doc/language_issues.ru b/doc/language_issues.ru
index 0a579d4063778ab5bc94e00534ff570f2637e4d8..d435f04373af849f4df72482f5969aee4fe59d98 100644 (file)
--- a/doc/language_issues.ru
+++ b/doc/language_issues.ru
@@ -25,7 +25,6 @@ WARNING: translation string unused: add xtaccess
 WARNING: translation string unused: add-route
 WARNING: translation string unused: admin user password has been changed
 WARNING: translation string unused: administrator user password
-WARNING: translation string unused: advproxy AUTH user IP cache TTL
 WARNING: translation string unused: advproxy LDAP auth
 WARNING: translation string unused: advproxy NTLM BDC hostname
 WARNING: translation string unused: advproxy NTLM PDC hostname
@@ -50,8 +49,6 @@ WARNING: translation string unused: advproxy chgwebpwd new password
 WARNING: translation string unused: advproxy chgwebpwd new password confirm
 WARNING: translation string unused: advproxy chgwebpwd old password
 WARNING: translation string unused: advproxy chgwebpwd username
-WARNING: translation string unused: advproxy content based throttling
-WARNING: translation string unused: advproxy errmsg auth ipcache ttl
 WARNING: translation string unused: advproxy errmsg change fail
 WARNING: translation string unused: advproxy errmsg change success
 WARNING: translation string unused: advproxy errmsg invalid bdc
@@ -952,7 +949,7 @@ WARNING: untranslated string: fwdfw err tgt_port = Invalid destination port.
 WARNING: untranslated string: fwdfw err time = You have to select at least one day.
 WARNING: untranslated string: fwdfw external port nat = External port (NAT)
 WARNING: untranslated string: fwdfw hint ip1 = The last generated rule may never match, because source and destination subnets may overlap.
-WARNING: untranslated string: fwdfw hint ip2 = Please double-check if this rule makes sense: 
+WARNING: untranslated string: fwdfw hint ip2 = Please double-check if this rule makes sense:
 WARNING: untranslated string: fwdfw hint mac = The destination group contains MAC addresses, which will be skipped during rule creation.
 WARNING: untranslated string: fwdfw iface = Interface
 WARNING: untranslated string: fwdfw limitconcon = Limit concurrent connections per IP address

diff --git a/doc/language_issues.tr b/doc/language_issues.tr
index d04c9930521c451e9c9e07bc6b153fd0b1b5a4a7..d4cbbac2d3265c72d4cc32cb45eff67b2569113a 100644 (file)
--- a/doc/language_issues.tr
+++ b/doc/language_issues.tr
@@ -48,7 +48,6 @@ WARNING: translation string unused: admin user password has been changed
 WARNING: translation string unused: administrator user password
 WARNING: translation string unused: adsl settings
 WARNING: translation string unused: advproxy AUTH method ntlm
-WARNING: translation string unused: advproxy AUTH user IP cache TTL
 WARNING: translation string unused: advproxy LDAP auth
 WARNING: translation string unused: advproxy NTLM BDC hostname
 WARNING: translation string unused: advproxy NTLM PDC hostname
@@ -73,8 +72,6 @@ WARNING: translation string unused: advproxy chgwebpwd new password
 WARNING: translation string unused: advproxy chgwebpwd new password confirm
 WARNING: translation string unused: advproxy chgwebpwd old password
 WARNING: translation string unused: advproxy chgwebpwd username
-WARNING: translation string unused: advproxy content based throttling
-WARNING: translation string unused: advproxy errmsg auth ipcache ttl
 WARNING: translation string unused: advproxy errmsg change fail
 WARNING: translation string unused: advproxy errmsg change success
 WARNING: translation string unused: advproxy errmsg invalid bdc

diff --git a/html/cgi-bin/proxy.cgi b/html/cgi-bin/proxy.cgi
index d1de4522d88bf4e0186197fabdaa3cdad70f2207..fdf9bddaf1cfadd72fe8a0e70aec1593f75c759c 100644 (file)
--- a/html/cgi-bin/proxy.cgi
+++ b/html/cgi-bin/proxy.cgi
@@ -232,6 +232,7 @@ $proxysettings{'AUTH_METHOD'} = 'none';
 $proxysettings{'AUTH_REALM'} = '';
 $proxysettings{'AUTH_MAX_USERIP'} = '';
 $proxysettings{'AUTH_CACHE_TTL'} = '60';
+$proxysettings{'AUTH_IPCACHE_TTL'} = '0';
 $proxysettings{'AUTH_CHILDREN'} = '5';
 $proxysettings{'NCSA_MIN_PASS_LEN'} = '6';
 $proxysettings{'NCSA_BYPASS_REDIR'} = 'off';
@@ -437,18 +438,23 @@ if (($proxysettings{'ACTION'} eq $Lang::tr{'save'}) || ($proxysettings{'ACTION'}
                                }
                        }
                }
+               if ((!($proxysettings{'AUTH_MAX_USERIP'} eq '')) &&
+                       ((!($proxysettings{'AUTH_MAX_USERIP'} =~ /^\d+/)) || ($proxysettings{'AUTH_MAX_USERIP'} < 1) || ($proxysettings{'AUTH_MAX_USERIP'} > 255)))
+               {
+                       $errormessage = $Lang::tr{'advproxy errmsg max userip'};
+                       goto ERROR;
+               }
                if (!($proxysettings{'AUTH_CACHE_TTL'} =~ /^\d+/))
                {
                        $errormessage = $Lang::tr{'advproxy errmsg auth cache ttl'};
                        goto ERROR;
                }
-               if ((!($proxysettings{'AUTH_MAX_USERIP'} eq '')) &&
-                       ((!($proxysettings{'AUTH_MAX_USERIP'} =~ /^\d+/)) || ($proxysettings{'AUTH_MAX_USERIP'} < 1) || ($proxysettings{'AUTH_MAX_USERIP'} > 255)))
+               if (!($proxysettings{'AUTH_IPCACHE_TTL'} =~ /^\d+/))
                {
-                       $errormessage = $Lang::tr{'advproxy errmsg max userip'};
+                       $errormessage = $Lang::tr{'advproxy errmsg auth ipcache ttl'};
                        goto ERROR;
                }
-               if (!($proxysettings{'AUTH_MAX_USERIP'} eq ''))
+               if ((!($proxysettings{'AUTH_MAX_USERIP'} eq '')) && ($proxysettings{'AUTH_IPCACHE_TTL'} eq '0'))
                {
                        $errormessage = $Lang::tr{'advproxy errmsg auth ipcache may not be null'};
                        goto ERROR;
@@ -1735,6 +1741,10 @@ print <<END
        <td class='base'>$Lang::tr{'advproxy AUTH limit of IP addresses'}:</td>
        <td><input type='text' name='AUTH_MAX_USERIP' value='$proxysettings{'AUTH_MAX_USERIP'}' size='5' /></td>
 </tr>
+<tr>
+       <td class='base'>$Lang::tr{'advproxy AUTH user IP cache TTL'}:</td>
+       <td><input type='text' name='AUTH_IPCACHE_TTL' value='$proxysettings{'AUTH_IPCACHE_TTL'}' size='5' /></td>
+</tr>
 <tr>
        <td class='base'>$Lang::tr{'advproxy AUTH always required'}:</td>
        <td><input type='checkbox' name='AUTH_ALWAYS_REQUIRED' $checked{'AUTH_ALWAYS_REQUIRED'}{'on'} /></td>
@@ -2031,6 +2041,7 @@ print <<END
 <td><input type='hidden' name='AUTH_CHILDREN'        value='$proxysettings{'AUTH_CHILDREN'}'></td>
 <td><input type='hidden' name='AUTH_CACHE_TTL'       value='$proxysettings{'AUTH_CACHE_TTL'}' size='5' /></td>
 <td><input type='hidden' name='AUTH_MAX_USERIP'      value='$proxysettings{'AUTH_MAX_USERIP'}' size='5' /></td>
+<td><input type='hidden' name='AUTH_IPCACHE_TTL'     value='$proxysettings{'AUTH_IPCACHE_TTL'}' size='5' /></td>
 <td><input type='hidden' name='AUTH_ALWAYS_REQUIRED' value='$proxysettings{'AUTH_ALWAYS_REQUIRED'}'></td>
 <td><input type='hidden' name='AUTH_REALM'           value='$proxysettings{'AUTH_REALM'}'></td>
 <td><input type='hidden' name='DST_NOAUTH'           value='$proxysettings{'DST_NOAUTH'}'></td>
@@ -2042,6 +2053,7 @@ print <<END
 <td><input type='hidden' name='AUTH_CHILDREN'        value='$proxysettings{'AUTH_CHILDREN'}'></td>
 <td><input type='hidden' name='AUTH_CACHE_TTL'       value='$proxysettings{'AUTH_CACHE_TTL'}' size='5' /></td>
 <td><input type='hidden' name='AUTH_MAX_USERIP'      value='$proxysettings{'AUTH_MAX_USERIP'}' size='5' /></td>
+<td><input type='hidden' name='AUTH_IPCACHE_TTL'     value='$proxysettings{'AUTH_IPCACHE_TTL'}' size='5' /></td>
 <td><input type='hidden' name='AUTH_REALM'           value='$proxysettings{'AUTH_REALM'}'></td>
 END
 ; }
@@ -3255,11 +3267,6 @@ END
        }
        print FILE "\n";
 
-       # If we use authentication, users must always authenticate
-       unless ($proxysettings{"AUTH_METHOD"} eq "") {
-               print FILE "authenticate_ip_ttl 0\n\n";
-       }
-
        if ((!($proxysettings{'AUTH_METHOD'} eq 'none')) && (!($proxysettings{'AUTH_METHOD'} eq 'ident')))
        {
                if ($proxysettings{'AUTH_METHOD'} eq 'ncsa')
@@ -3268,6 +3275,7 @@ END
                        print FILE "auth_param basic children $proxysettings{'AUTH_CHILDREN'}\n";
                        print FILE "auth_param basic realm $authrealm\n";
                        print FILE "auth_param basic credentialsttl $proxysettings{'AUTH_CACHE_TTL'} minutes\n";
+                       if (!($proxysettings{'AUTH_IPCACHE_TTL'} eq '0')) { print FILE "\nauthenticate_ip_ttl $proxysettings{'AUTH_IPCACHE_TTL'} minutes\n"; }
                }
 
                if ($proxysettings{'AUTH_METHOD'} eq 'ldap')
@@ -3312,6 +3320,7 @@ END
                        print FILE "auth_param basic children $proxysettings{'AUTH_CHILDREN'}\n";
                        print FILE "auth_param basic realm $authrealm\n";
                        print FILE "auth_param basic credentialsttl $proxysettings{'AUTH_CACHE_TTL'} minutes\n";
+                       if (!($proxysettings{'AUTH_IPCACHE_TTL'} eq '0')) { print FILE "\nauthenticate_ip_ttl $proxysettings{'AUTH_IPCACHE_TTL'} minutes\n"; }
                }
 
                if ($proxysettings{'AUTH_METHOD'} eq 'ntlm-auth')
@@ -3352,6 +3361,7 @@ END
                        print FILE "auth_param basic children $proxysettings{'AUTH_CHILDREN'}\n";
                        print FILE "auth_param basic realm $authrealm\n";
                        print FILE "auth_param basic credentialsttl $proxysettings{'AUTH_CACHE_TTL'} minutes\n";
+                       if (!($proxysettings{'AUTH_IPCACHE_TTL'} eq '0')) { print FILE "\nauthenticate_ip_ttl $proxysettings{'AUTH_IPCACHE_TTL'} minutes\n"; }
                }
 
                print FILE "\n";