[squid-users] Re: [help] mail.yahoo problem

You could always use application level routing to bypass any black
spots in the network once the spots are known and you have a way
around them.

See the cache_peer and cache_peer_access directives in squid.conf.
Also of interest is the prefer_direct or never_direct directives.

It may also be possible to solve the problem by routing (plain or NAT
based depending on the network), especially if you are doing
transparent interception.

Regards
Henrik Nordström
Squid Developer
MARA Systems AB, Sweden

On Monday 14 January 2002 04.58, Marlon Pabilona wrote:
> We are experiencing problem with mail.yahoo.com site. Some of our
> proxy server could connect without problem but some could not
> connect to the site. Below are the example tcpdump result which
> shows that no proper tcp communication between our p5 and
> mail.yahoo.com server. Unlike to our p2 which could properly
> connect to the remote site. Is there a way which we could redirect
> all users connecting to proxy5 to the server properly working with
> yahoo site ? We are using a freebsd system, could we do it using
> ipfw ? if yes, could you help us with the policy ? Thanks!
>
> p5 server:
> ========
> 19:06:09.097749 p5.skyinet.net.21344 >
> l2.login.vip.dcx.yahoo.com.http: S 2843699304:2843699304(0) win
> 17520 <mss 1460,nop,wscale 0,nop,nop,timestamp 829826369 0> (DF)
> 19:06:09.167617 p5.skyinet.net.21970 >
> l1.login.vip.dcx.yahoo.com.http: S 3053723877:3053723877(0) win
> 17520 <mss 1460,nop,wscale 0,nop,nop,timestamp 829826376 0> (DF)
> 19:06:09.217671 p5.skyinet.net.22082 >
> l2.login.vip.dcx.yahoo.com.http: S 175127670:175127670(0) win 17520
> <mss 1460,nop,wscale 0,nop,nop,timestamp 829826381 0> (DF)
[...]
>
> p2 server:
> =======
> 19:07:48.948750 p2.skyinet.net.22511 >
> l2.login.vip.dcx.yahoo.com.http: S 615019439:615019439(0) win 17520
> <mss 1460,nop,wscale 0,nop,nop,timestamp 829756885 0> (DF)
> 19:07:49.186686 l2.login.vip.dcx.yahoo.com.http >
> p2.skyinet.net.22511: S 2643554901:2643554901(0) ack 615019440 win
> 17520 <mss 1460> (DF) 19:07:49.186774 p2.skyinet.net.22511
[...]

-- 
MARA Systems AB, Giving you basic free Squid support
Customized solutions, packaged solutions and priority support
available on request