Router - Juniper SRX

The Juniper SRX range of routers are high-performance routers, intended for small business and branch networks. The can often be bought cheaply on eBay.

Known working setups

Router	JunOS Version	Modem	Who	IPv6	Status
SRX100B	12.1X44-D40.2	ZyXEL P660R in bridge mode	Nhumfrey	✗	✗ PADI sent but no PADO response
SRX100B	12.1X44-D40.2	BT Provided Huawei HG612 FTTC Modem	Nhumfrey	✗	✓ Working 2015-01-13
SRX100B	12.1X46-D30.2	BT Provided Huawei HG612 FTTC Modem	Nhumfrey	✓	✓ Working 2015-03-22

Dual-stack Example Config

• Statically configured IPv4 and IPv6 for a single AAISP line
• Trust VLAN on Ethernet Port 0-6
• PPPoE configured on Ethernet Port 7

## Last changed: 2015-03-29 17:42:36 BST
version 12.1X46-D30.2;
system {
    host-name dsl-router;
    domain-name aa.net.uk;
    time-zone Europe/London;
    root-authentication {
        encrypted-password "XXXX";
    }
    name-server {
        217.169.20.20;
        217.169.20.21;
    }
    services {
        ssh;
        xnm-clear-text;
        web-management {
            http {
                interface vlan.3;
            }
            https {
                system-generated-certificate;
                interface vlan.3;
            }
        }
        dhcp {
            name-server {
                217.169.20.20;
                217.169.20.21;
            }
            pool 192.168.1.0/24 {
                address-range low 192.168.1.100 high 192.168.1.250;
                router {
                    192.168.1.1;
                }
            }
        }
    }
    syslog {
        archive size 100k files 3;
        user * {
            any emergency;
        }
        file messages {
            any critical;
            authorization info;
        }
        file interactive-commands {
            interactive-commands error;
        }
    }
    max-configurations-on-flash 5;
    max-configuration-rollbacks 5;
    license {
        autoupdate {
            url https://ae1.juniper.net/junos/key_retrieval;
        }
    }
    ntp {
        server 90.155.53.94;
        server 90.155.53.93;
    }
}
interfaces {
    interface-range interfaces-trust {
        member fe-0/0/0;
        member fe-0/0/1;
        member fe-0/0/2;
        member fe-0/0/3;
        member fe-0/0/4;
        member fe-0/0/5;
        member fe-0/0/6;
        unit 0 {
            family ethernet-switching {
                vlan {
                    members vlan-trust;
                }
            }
        }
    }
    fe-0/0/7 {
        description "PPPoE Port";
        unit 0 {
            encapsulation ppp-over-ether;
        }
    }
    lo0 {
        unit 0 {
            family inet6 {
                address 2001:8b0:XXXX::1/128;
            }
        }
    }
    pp0 {
        unit 0 {
            description AAISP;
            point-to-point;
            ppp-options {
                chap {
                    default-chap-secret "XXXX";
                    local-name "XXXX@a";
                    no-rfc2486;
                    passive;
                }
            }
            pppoe-options {
                underlying-interface fe-0/0/7.0;
                idle-timeout 0;
                auto-reconnect 5;
                client;
            }
            family inet {
                mtu 1492;
                negotiate-address;
            }
            family inet6 {
                mtu 1492;
            }
        }
    }
    vlan {
        unit 3 {
            family inet {
                address 192.168.1.1/24;
            }
            family inet6 {
                address 2001:8b0:XXXX:3::1/64;
            }
        }
    }
}
routing-options {
    rib inet6.0 {
        static {
            route 0::0/0 next-hop pp0.0;
        }
    }
    static {
        route 0.0.0.0/0 next-hop pp0.0;
    }
}
protocols {
    router-advertisement {
        interface vlan.3 {
            prefix 2001:8b0:XXXX:3::/64;
        }
    }
}
security {
    forwarding-options {
        family {
            inet6 {
                mode flow-based;
            }
        }
    }
    screen {
        ids-option untrust-screen {
            icmp {
                ping-death;
            }
            ip {
                source-route-option;
                tear-drop;
            }
            tcp {
                syn-flood {
                    alarm-threshold 1024;
                    attack-threshold 200;
                    source-threshold 1024;
                    destination-threshold 2048;
                    timeout 20;
                }
                land;
            }
        }
    }
    nat {
        source {
            rule-set trust-to-untrust {
                from zone trust;
                to zone untrust;
                rule source-nat-rule {
                    match {
                        source-address 0.0.0.0/0;
                    }
                    then {
                        source-nat {
                            interface;
                        }
                    }
                }
            }
        }
    }
    policies {
        from-zone trust to-zone untrust {
            policy trust-to-untrust {
                match {
                    source-address any;
                    destination-address any;
                    application any;
                }
                then {
                    permit;
                }
            }
        }
        from-zone untrust to-zone trust {
            policy ping6-to-trust {
                match {
                    source-address any-ipv6;
                    destination-address any-ipv6;
                    application junos-pingv6;
                }
                then {
                    permit;
                }
            }
            policy reject-untrust-to-trust {
                match {
                    source-address any;
                    destination-address any;
                    application any;
                }
                then {
                    reject;
                }
            }
        }
        default-policy {
            deny-all;
        }
    }
    zones {
        security-zone trust {
            host-inbound-traffic {
                system-services {
                    all;
                }
                protocols {
                    all;
                }
            }
            interfaces {
                vlan.3;
                lo0.0;
            }
        }
        security-zone untrust {
            screen untrust-screen;
            host-inbound-traffic {
                system-services {
                    ping;
                }
            }
            interfaces {
                pp0.0;
            }
        }
    }
}
vlans {
    vlan-trust {
        vlan-id 3;
        l3-interface vlan.3;
    }
}