On 05/04/2012 10:25, Colin Coe wrote:
On Wed, Apr 4, 2012 at 7:40 PM, Amos Jeffries<squid3@xxxxxxxxxxxxx> wrote:
On 4/04/2012 6:01 p.m., Eliezer Croitoru wrote:
On 04/04/2012 08:12, Colin Coe wrote:
Hi all
I'm trying to get our squid proxy server to allow clients to do
outbound FTP. The problem is that our corporate proxy uses tcp/8200
for http/https traffic and port 221 for FTP traffic.
Tailing the squid logs I see that squid is attempting to send all FTP
requests direct instead of going through the corporate proxy.
Any ideas how I'd configure squid to use the corp proxy for FTP
instead of going direct?
Thanks
CC
if you have parent proxy you should use the never_direct acl.
acl ftp_ports port 21
Make that "20 21" (note the space between)
Amos
Hi all
I've made changes based on these suggestions but it still doesn't
work. My squid.conf looks like:
---
cache_peer 172.22.0.7 parent 8200 0 default no-query no-netdb-exchange
proxy-only no-digest no-delay name=other
cache_peer 172.22.0.7 parent 221 0 default no-query no-netdb-exchange
proxy-only no-digest no-delay name=ftp
cache_dir ufs /var/cache/squid 4900 16 256
http_port 3128
hierarchy_stoplist cgi-bin ?
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
acl manager proto cache_object
acl localhost src 127.0.0.1/32 ::1
acl to_localhost dst 127.0.0.0/8 0.0.0.0/32 ::1
acl localnet src 10.0.0.0/8 # RFC 1918 possible internal network
acl localnet src 172.16.0.0/12 # RFC 1918 possible internal network
acl localnet src 192.168.0.0/16 # RFC 1918 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 ftp_ports port 21 20
acl SSL_ports port 443 21 20
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 CONNECT method CONNECT
cache_peer_access ftp allow ftp_ports
cache_peer_access ftp deny all
never_direct allow ftp_ports
cache_peer_access other deny ftp_ports
acl Prod dst 172.22.106.0/23
acl Prod dst 172.22.176.0/23
acl Dev dst 172.22.102.0/23
acl BOM dstdomain .bom.gov.au
cache deny BOM
always_direct allow Dev
always_direct allow Prod
never_direct allow all
http_access allow manager localhost
http_access deny manager
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports
http_access allow localhost
http_access allow localnet
http_access deny all
---
On the proxy server, when I do a 'tcpdump host client and port 3128' I
get nothing more than
---
15:22:19.515518 IP 172.22.106.23.48052> 172.22.106.10.3128: Flags
[S], seq 2995762959, win 5840, options [mss 1460,sackOK,TS val
1681190449 ecr 0,nop,wscale 7], length 0
15:22:19.515567 IP 172.22.106.10.3128> 172.22.106.23.48052: Flags
[S.], seq 1966725410, ack 2995762960, win 14480, options [mss
1460,sackOK,TS val 699366121 ecr 1681190449], length 0
15:22:19.515740 IP 172.22.106.23.48052> 172.22.106.10.3128: Flags
[.], ack 1, win 5840, options [nop,nop,TS val 1681190449 ecr
699366121], length 0
15:23:49.606087 IP 172.22.106.23.48052> 172.22.106.10.3128: Flags
[F.], seq 1, ack 1, win 5840, options [nop,nop,TS val 1681280540 ecr
699366121], length 0
15:23:49.606163 IP 172.22.106.10.3128> 172.22.106.23.48052: Flags
[.], ack 2, win 14480, options [nop,nop,TS val 699456212 ecr
1681280540], length 0
15:23:49.606337 IP 172.22.106.10.3128> 172.22.106.23.48052: Flags
[F.], seq 1, ack 2, win 14480, options [nop,nop,TS val 699456212 ecr
1681280540], length 0
15:23:49.606465 IP 172.22.106.23.48052> 172.22.106.10.3128: Flags
[.], ack 2, win 5840, options [nop,nop,TS val 1681280540 ecr
699456212], length 0
---
Nothing goes into the access.log file from this connection either.
so what is your problem now?
that nothing goes into the access log?
let's go two steps back.
i didnt make sure but you do have:
acl Prod dst 172.22.106.0/23
acl Prod dst 172.22.176.0/23
acl Dev dst 172.22.102.0/23
always_direct allow Dev
always_direct allow Prod
and if you dont get anything in the access log it probably means that
the clients are not connecting to the server.
how you are directing the ftp clients to squid proxy server?
you do know that squid is not intercepting ftp protocol by itself?
there was some kind of ftp interception tool as far as i remember.
so just a sec state your goals again and what you have done so far.
Regards,
Eliezer
Any ideas?
CC
--
Eliezer Croitoru
https://www1.ngtech.co.il
IT consulting for Nonprofit organizations
eliezer <at> ngtech.co.il
