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PBR between zones

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 Hi I am trying to configure transparent proxy with SRX240 and SQUID. SRX240 is my GW and I want to forward traffic using PBR to SQUID server but it's not working.

 

. Here's my related config.

 

LAN testing station [security zone LAN]  - 192.168.1.98  

SQUID proxy          [security zone DMZ] - 192.168.200.22

 

I've configured firewall filter and placed as input on SRX LAN GW interface

 

# run show configuration firewall family inet filter SQUID
term 1 { from { source-address { 192.168.1.98/32; } destination-address { 0.0.0.0/0; } protocol tcp; destination-port [ 80 443 ]; } then { log; routing-instance SQUID-VRF; } } term 2 { then accept; }
# run show configuration interfaces reth5     
description LAN;
redundant-ether-options {
    redundancy-group 5;
    minimum-links 1;
}
unit 0 {
    family inet {
        filter {
            input SQUID;
        }
        sampling {
            input;
            output;
        }
        address 192.168.1.1/24;
    }
}

I've configure VRF and routing-options

 

# run show configuration routing-instances 
SQUID-VRF {
    instance-type forwarding;
    routing-options {
        static {
            route 0.0.0.0/0 next-hop 192.168.200.22;
        }
    }
}
rib-groups {
    IMPORT-PHY {
        import-rib [ inet.0 SQUID-VRF.inet.0 ];
    }
}

and here's my security policy between zones

 

# run show security policies from-zone LAN to-zone DMZ policy-name allow-web   
node0:
--------------------------------------------------------------------------
From zone: LAN, To zone: DMZ
  Policy: allow-web, State: enabled, Index: 100, Scope Policy: 0, Sequence number: 15
    Source addresses: any
    Destination addresses: squid
    Applications: junos-http, junos-https
    Action: permit, log

When I initiate http or https traffic from my testing station, no traffic comes on SQUID server

 

[root@squid ~]# tcpdump -ni eno16780032 not port 22 | grep -i 192.168.1.98
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eno16780032, link-type EN10MB (Ethernet), capture size 65535 bytes
^C
0 packets captured
0 packets received by filter
0 packets dropped by kernel
[root@squid ~]# iptables -nvL -t nat
Chain PREROUTING (policy ACCEPT 95 packets, 5100 bytes)
 pkts bytes target     prot opt in     out     source               destination         
    0     0 DNAT       tcp  --  *      *       192.168.0.0/23       0.0.0.0/0            tcp dpt:443 to:192.168.200.22:3129
    0     0 DNAT       tcp  --  *      *       192.168.0.0/23       0.0.0.0/0            tcp dpt:80 to:192.168.200.22:3128

Firewall filter match the traffic but it looks like it's not routed properly

# run show firewall log interface reth5 
Log :
Time      Filter    Action Interface     Protocol        Src Addr                         Dest Addr
21:22:59  pfe       A      reth5.0       TCP             192.168.1.98                     2.21.74.91
21:22:59  pfe       A      reth5.0       TCP             192.168.1.98                     35.167.151.38
21:22:59  pfe       A      reth5.0       TCP             192.168.1.98                     172.217.23.206
21:22:59  pfe       A      reth5.0       TCP             192.168.1.98                     54.229.224.146
21:22:58  pfe       A      reth5.0       TCP             192.168.1.98                     35.167.184.4
21:22:58  pfe       A      reth5.0       TCP             192.168.1.98                     2.21.74.91
21:22:58  pfe       A      reth5.0       TCP             192.168.1.98                     2.21.74.105

and here's my routing table 

inet.0: 24 destinations, 25 routes (24 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

0.0.0.0/0          *[Static/5] 19w1d 10:40:40
                    > to x.x.x.x via reth1.0
x.x.x.x/29         *[Direct/0] 19w1d 10:40:40> via reth1.0
                    [Direct/0] 19w1d 10:29:15> via reth1.0
x.x.x.x/32         *[Local/0] 19w1d 11:26:02
                      Local via reth1.0
x.x.x.x/32         *[Local/0] 19w1d 10:29:15
                      Local via reth1.0
192.168.1.0/24     *[Direct/0] 19w1d 10:23:37> via reth5.0
192.168.1.1/32     *[Local/0] 35w3d 23:02:46

192.168.200.0/24   *[Direct/0] 19w1d 10:24:53
                    > via reth6.0       
192.168.200.1/32   *[Local/0] 35w3d 23:02:46



SQUID-VRF.inet.0: 18 destinations, 19 routes (18 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

0.0.0.0/0          *[Static/5] 00:29:07
                    > to 192.168.200.22 via reth6.0
x.x.x.x/29         *[Direct/0] 00:29:07> via reth1.0
                    [Direct/0] 00:29:07> via reth1.0
x.x.x.x/32         *[Local/0] 00:29:07
                      Local via reth1.0
x.x.x.x/32         *[Local/0] 00:29:07
                      Local via reth1.0

192.168.1.0/24     *[Direct/0] 00:29:07
                    > via reth5.0
192.168.1.1/32     *[Local/0] 00:29:07
                      Local via reth5.0
192.168.200.1/32   *[Local/0] 00:29:07

I thank you for your advice. If you need more detail, please let me know.

 


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