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Web Proxy Log - Which interface ?

Hi All,

We are using Sophos UTM as a web proxy, we have multiple internet interfaces.

I'm using a "Multipath" rule to send certain domains out of a certain interface.

But where and in what log will it show me what traffic is going out of what interface ? Although the multipath rule is working (i Think) I need to confirm a few things (I suspect that HTTP traffic is working fine as domains as specified as example.com load fine via HTTP, inc subdomains but not on HTTPS)

Thanks,

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0 DouglasFoster over 6 years ago

Start with the web filtering logs. If you are seeing a lot of Bad Gateway / Host Not reachable events logged, it might be your multipath. Since the symptoms seem related to protocol (HTTP vs HTTPS), it most likely has nothing with packet routing, and the logs will give you the best clues. Also check out these forum entries:

Symptoms related to MTU

community.sophos.com/.../unable-to-login-on-certain-website-when-using-sophos-utm-as-a-web-proxy

community.sophos.com/.../how-to-ignore-my-isps-dhcp-mtu-of-only-576

Problems with Chrome and Firefox since 9.508, when used with Transparent SSO

community.sophos.com/.../utm-9-509-3---webpage-timeouts-in-chrome-after-upgrade-9-509-3-in-transparent-mode
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0 DuncanNewell over 6 years ago in reply to DouglasFoster

Thanks for the reply. They dont really relate to the issue im having. Both internet links work fine, its more of a point how and where can I prove 100% that the rule is working. I think some stuff on this rule isnt working as it should but I need to know where it will tell me in the logs what interface the traffic is going out of.

For example, I could visit a website and search the logs via SSH but I see the traffic but no where can i see any flag that tells me what interface this is going out of.

Thanks, Duncan
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0 DKKDG over 6 years ago in reply to DuncanNewell

Hi Duncan,

you can watch the full firewall log via ssh. -> tail f /var/log/packetfilter.log
There you will find your answer.

e.g.
2018:06:13-08:56:20 firewallv8-2 ulogd[9311]: id="2001" severity="info" sys="SecureNet" sub="packetfilter" name="Packet dropped" action="drop" fwrule="60002" initf="eth2.124" outitf="ppp0"

Here you can see the in interface(initf) and out interface(outitf)

best regards

DKNL
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0 DKKDG over 6 years ago in reply to DuncanNewell

Hi Duncan,

you can watch the full firewall log via ssh. -> tail f /var/log/packetfilter.log
There you will find your answer.

e.g.
2018:06:13-08:56:20 firewallv8-2 ulogd[9311]: id="2001" severity="info" sys="SecureNet" sub="packetfilter" name="Packet dropped" action="drop" fwrule="60002" initf="eth2.124" outitf="ppp0"

Here you can see the in interface(initf) and out interface(outitf)

best regards

DKNL
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