Eliezer Croitoru <eliezer@xxxxxxxxxxxx> wrote: >Hey, > >I wont ask why do you need it but you need to first allow (ACCEPT) the >UID of the proxy user and then intercept the local port 80 traffic > >iptables -t nat -A OUTPUT -m owner --uid-owner 31 -j ACCEPT >iptables -t nat -A OUTPUT -p tcp --dport 80 -j REDIRECT --to-port 3129 > >(ALLL THE ABOVE is only if the UID of the proxy user is 31.. Yeah, that's what I have. I split it up because the former is what I was looking at a cli to enable it and the later is iptables-save without counters (-c iirc). I guess it added confusion - sorry. > >if it's on the local machine why do you need exactly to intercept the >traffic?(curios)? Mainly for better traffic monitoring but also to have a minimal local cache when on a plane, to learn squid, to play with webapps. > >and try with 3.3.8 to use: >http_port 127.0.0.1:3128 >http_port 3129 intercept >just to make sure that there is no collision between the two purposes >of >the port. > Hummm, didn't know about intercept. I've tried both with and without transparent on 3128 (though I'm not sure how this is supposed to work without transparent as I'm only passing it a url and not http://proxy/url? >Eliezer > >On 09/22/2013 03:58 PM, shawn wilson wrote: >> I'm trying to setup a transparent proxy on my local machine. This >> works when I give Firefox proxy info, but this fails when I get >> iptables to redirect with (the rule I keep turning on/off): >> iptables -t nat -A OUTPUT -p tcp --dport 80 -j REDIRECT --to-port >3128 >> >> And the rest of the nat table is just: >> *nat >> -A OUTPUT -m owner --uid-owner 31 -j ACCEPT >> COMMIT >> >> When this is enabled, I just get: >> ERROR >> >> The requested URL could not be retrieved >> >> and "Invalid URL" >> Which is a squid message and I'm seeing the requests in the access >log >> but I'm guessing something needs to be rewritten that isn't or squid >> is doing too much. >> >> swlap1 ~ # squid -v >> Squid Cache: Version 3.3.8 >> configure options: '--prefix=/usr' '--build=x86_64-pc-linux-gnu' >> '--host=x86_64-pc-linux-gnu' '--mandir=/usr/share/man' >> '--infodir=/usr/share/info' '--datadir=/usr/share' >'--sysconfdir=/etc' >> '--localstatedir=/var/lib' '--libdir=/usr/lib64' >> '--disable-dependency-tracking' '--sysconfdir=/etc/squid' >> '--libexecdir=/usr/libexec/squid' '--localstatedir=/var' >> '--with-pidfile=/run/squid.pid' '--datadir=/usr/share/squid' >> '--with-logdir=/var/log/squid' '--with-default-user=squid' >> '--enable-removal-policies=lru,heap' >> '--enable-storeio=aufs,diskd,rock,ufs' '--enable-disk-io' >> '--enable-auth' >> '--enable-auth-basic=MSNT,MSNT-multi-domain,NCSA,POP3,getpwnam,PAM' >> '--enable-auth-digest=file' '--enable-auth-ntlm=none' >> '--enable-auth-negotiate=none' >> '--enable-external-acl-helpers=file_userip,session,unix_group' >> '--enable-log-daemon-helpers' '--enable-url-rewrite-helpers' >> '--enable-cache-digests' '--enable-delay-pools' '--enable-eui' >> '--enable-icmp' '--enable-follow-x-forwarded-for' '--enable-esi' >> '--with-large-files' '--disable-strict-error-checking' >> '--without-libcap' '--enable-ipv6' '--disable-snmp' '--enable-ssl' >> '--disable-ssl-crtd' '--disable-icap-client' '--disable-ecap' >> '--enable-linux-netfilter' 'build_alias=x86_64-pc-linux-gnu' >> 'host_alias=x86_64-pc-linux-gnu' 'CC=x86_64-pc-linux-gnu-gcc' >> 'CFLAGS=-march=native -freorder-blocks-and-partition -O2 -pipe' >> 'LDFLAGS=-Wl,-O1 -Wl,--as-needed' 'CXXFLAGS=-march=native >> -freorder-blocks-and-partition -O2 -pipe' >> 'PKG_CONFIG_PATH=/usr/lib64/pkgconfig' >> >> /etc/squid/squid.conf: >> >> # >> # Recommended minimum configuration: >> # >> >> # Example rule allowing access from your local networks. >> # Adapt to list your (internal) IP networks from where browsing >> # should be allowed >> acl localnet src 10.0.0.0/8 # RFC1918 possible internal network >> acl localnet src 172.16.0.0/12 # RFC1918 possible internal network >> acl localnet src 192.168.0.0/16 # RFC1918 possible internal >network >> acl localnet src fc00::/7 # RFC 4193 local private network >range >> acl localnet src fe80::/10 # RFC 4291 link-local (directly >> plugged) machines >> >> acl SSL_ports port 443 >> acl Safe_ports port 80 # http >> acl Safe_ports port 21 # ftp >> acl Safe_ports port 443 # https >> acl Safe_ports port 70 # gopher >> acl Safe_ports port 210 # wais >> acl Safe_ports port 1025-65535 # unregistered ports >> acl Safe_ports port 280 # http-mgmt >> acl Safe_ports port 488 # gss-http >> acl Safe_ports port 591 # filemaker >> acl Safe_ports port 777 # multiling http >> acl Safe_ports port 901 # SWAT >> acl CONNECT method CONNECT >> >> # >> # Recommended minimum Access Permission configuration: >> # >> # Deny requests to certain unsafe ports >> http_access deny !Safe_ports >> >> # Deny CONNECT to other than secure SSL ports >> http_access deny CONNECT !SSL_ports >> >> # Only allow cachemgr access from localhost >> http_access allow localhost manager >> http_access deny manager >> >> # We strongly recommend the following be uncommented to protect >innocent >> # web applications running on the proxy server who think the only >> # one who can access services on "localhost" is a local user >> #http_access deny to_localhost >> >> # >> # INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS >> # >> acl localhost src 127.0.0.1/32 ::1 >> acl to_localhost dst 127.0.0.0/8 0.0.0.0/32 ::1 >> >> >> # Example rule allowing access from your local networks. >> # Adapt localnet in the ACL section to list your (internal) IP >networks >> # from where browsing should be allowed >> http_access allow localnet >> http_access allow localhost >> >> # And finally deny all other access to this proxy >> http_access deny all >> >> # Squid normally listens to port 3128 >> http_port 3128 transparent >> >> # Uncomment and adjust the following to add a disk cache directory. >> #cache_dir ufs /var/cache/squid 100 16 256 >> >> # Leave coredumps in the first cache dir >> coredump_dir /var/cache/squid >> >> # >> # Add any of your own refresh_pattern entries above these. >> # >> refresh_pattern ^ftp: 1440 20% 10080 >> refresh_pattern ^gopher: 1440 0% 1440 >> refresh_pattern -i (/cgi-bin/|\?) 0 0% 0 >> refresh_pattern . 0 20% 4320 >>
