Support for netflow logs
Hi, I was trying to receive Netflow logs from firewall devices in syslog-ng and then forward to a central server. Does syslog-ng support netflow such that I can validate and filter out all non-netflow log lines? I also dumped some netflow logs to a file and found it to be binary. Therefore I haven't been able to ascertain the format and filtering mechanism. Any pointers on this topic would be helpful. Thanks Raghu
I'm also interested in this. As I know there is no native netflow input in syslog-ng and when I did some research on it, it is not very easy. Logstash has a native netflow input and output, but it seems this is abandoned and not very stable. nxLog also support netflow but I'm not sure if it is only in the enterprise version or it is available in the CE too L: On Wed, Nov 27, 2019 at 1:58 PM Raghunath Adhyapak <funduraghu@gmail.com> wrote:
Hi,
I was trying to receive Netflow logs from firewall devices in syslog-ng and then forward to a central server. Does syslog-ng support netflow such that I can validate and filter out all non-netflow log lines? I also dumped some netflow logs to a file and found it to be binary. Therefore I haven't been able to ascertain the format and filtering mechanism.
Any pointers on this topic would be helpful.
Thanks Raghu
______________________________________________________________________________ Member info: https://lists.balabit.hu/mailman/listinfo/syslog-ng Documentation: http://www.balabit.com/support/documentation/?product=syslog-ng FAQ: http://www.balabit.com/wiki/syslog-ng-faq
Hello Raghu, Netflow is indeed a binary protocol. Since Syslog-ng is a text based log management system, I think your only option is to find some kind of "gateway" for the Netflow traffic. The gateway should be able to receive and convert those packets into a text format. (At this point you will certainly loose some information, since not all network related bytes can be converted into a printable character. Or you should use some encoding on it.) This gateway might run as a stand alone application, or you can integrate it into Syslog-ng as a program (or python) source. Best regards, Laci ________________________________________ From: syslog-ng <syslog-ng-bounces@lists.balabit.hu> on behalf of Pal, Laszlo <vlad@vlad.hu> Sent: Wednesday, November 27, 2019 14:03 To: Syslog-ng users' and developers' mailing list Subject: Re: [syslog-ng] Support for netflow logs CAUTION: This email originated from outside of the organization. Do not follow guidance, click links, or open attachments unless you recognize the sender and know the content is safe. I'm also interested in this. As I know there is no native netflow input in syslog-ng and when I did some research on it, it is not very easy. Logstash has a native netflow input and output, but it seems this is abandoned and not very stable. nxLog also support netflow but I'm not sure if it is only in the enterprise version or it is available in the CE too L: On Wed, Nov 27, 2019 at 1:58 PM Raghunath Adhyapak <funduraghu@gmail.com<mailto:funduraghu@gmail.com>> wrote: Hi, I was trying to receive Netflow logs from firewall devices in syslog-ng and then forward to a central server. Does syslog-ng support netflow such that I can validate and filter out all non-netflow log lines? I also dumped some netflow logs to a file and found it to be binary. Therefore I haven't been able to ascertain the format and filtering mechanism. Any pointers on this topic would be helpful. Thanks Raghu ______________________________________________________________________________ Member info: https://lists.balabit.hu/mailman/listinfo/syslog-ng<https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.balabit.hu%2Fmailman%2Flistinfo%2Fsyslog-ng&data=02%7C01%7CLaszlo.Szemere%40oneidentity.com%7C8184443d85744e714f7f08d7733a477f%7C91c369b51c9e439c989c1867ec606603%7C0%7C0%7C637104566463198370&sdata=85l75FHhoJ7%2Fl%2FLPMhe8OuP6ZY00oRpgW38XZFcigeY%3D&reserved=0> Documentation: http://www.balabit.com/support/documentation/?product=syslog-ng<https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.balabit.com%2Fsupport%2Fdocumentation%2F%3Fproduct%3Dsyslog-ng&data=02%7C01%7CLaszlo.Szemere%40oneidentity.com%7C8184443d85744e714f7f08d7733a477f%7C91c369b51c9e439c989c1867ec606603%7C0%7C0%7C637104566463208370&sdata=Dw5MDQ3N1r%2FZ1W9L3hoA%2FRq5I0qzKs16IFrwWEkwaGk%3D&reserved=0> FAQ: http://www.balabit.com/wiki/syslog-ng-faq<https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.balabit.com%2Fwiki%2Fsyslog-ng-faq&data=02%7C01%7CLaszlo.Szemere%40oneidentity.com%7C8184443d85744e714f7f08d7733a477f%7C91c369b51c9e439c989c1867ec606603%7C0%7C0%7C637104566463208370&sdata=nTLrYU59%2FG%2FRC6SxO83BWiBMb1qeHZ2z%2F%2FuEjJWddmo%3D&reserved=0>
Thanks. On Mon, Dec 2, 2019, 18:02 Laszlo Szemere (lszemere) < Laszlo.Szemere@oneidentity.com> wrote:
Hello Raghu, Netflow is indeed a binary protocol. Since Syslog-ng is a text based log management system, I think your only option is to find some kind of "gateway" for the Netflow traffic.
The gateway should be able to receive and convert those packets into a text format. (At this point you will certainly loose some information, since not all network related bytes can be converted into a printable character. Or you should use some encoding on it.) This gateway might run as a stand alone application, or you can integrate it into Syslog-ng as a program (or python) source.
Best regards, Laci
________________________________________ From: syslog-ng <syslog-ng-bounces@lists.balabit.hu> on behalf of Pal, Laszlo <vlad@vlad.hu> Sent: Wednesday, November 27, 2019 14:03 To: Syslog-ng users' and developers' mailing list Subject: Re: [syslog-ng] Support for netflow logs
CAUTION: This email originated from outside of the organization. Do not follow guidance, click links, or open attachments unless you recognize the sender and know the content is safe.
I'm also interested in this. As I know there is no native netflow input in syslog-ng and when I did some research on it, it is not very easy. Logstash has a native netflow input and output, but it seems this is abandoned and not very stable. nxLog also support netflow but I'm not sure if it is only in the enterprise version or it is available in the CE too
L:
On Wed, Nov 27, 2019 at 1:58 PM Raghunath Adhyapak <funduraghu@gmail.com <mailto:funduraghu@gmail.com>> wrote: Hi,
I was trying to receive Netflow logs from firewall devices in syslog-ng and then forward to a central server. Does syslog-ng support netflow such that I can validate and filter out all non-netflow log lines? I also dumped some netflow logs to a file and found it to be binary. Therefore I haven't been able to ascertain the format and filtering mechanism.
Any pointers on this topic would be helpful.
Thanks Raghu
______________________________________________________________________________ Member info: https://lists.balabit.hu/mailman/listinfo/syslog-ng<; https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.bala...
Documentation: http://www.balabit.com/support/documentation/?product=syslog-ng<; https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.balabit...
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______________________________________________________________________________ Member info: https://lists.balabit.hu/mailman/listinfo/syslog-ng Documentation: http://www.balabit.com/support/documentation/?product=syslog-ng FAQ: http://www.balabit.com/wiki/syslog-ng-faq
Hi, I observe that timestamp and host is getting added to my netflow log before being forwarded even though I am using pure tcp driver for output and not syslog. Raghu On Mon, Dec 2, 2019, 20:49 Raghunath Adhyapak <funduraghu@gmail.com> wrote:
Thanks.
On Mon, Dec 2, 2019, 18:02 Laszlo Szemere (lszemere) < Laszlo.Szemere@oneidentity.com> wrote:
Hello Raghu, Netflow is indeed a binary protocol. Since Syslog-ng is a text based log management system, I think your only option is to find some kind of "gateway" for the Netflow traffic.
The gateway should be able to receive and convert those packets into a text format. (At this point you will certainly loose some information, since not all network related bytes can be converted into a printable character. Or you should use some encoding on it.) This gateway might run as a stand alone application, or you can integrate it into Syslog-ng as a program (or python) source.
Best regards, Laci
________________________________________ From: syslog-ng <syslog-ng-bounces@lists.balabit.hu> on behalf of Pal, Laszlo <vlad@vlad.hu> Sent: Wednesday, November 27, 2019 14:03 To: Syslog-ng users' and developers' mailing list Subject: Re: [syslog-ng] Support for netflow logs
CAUTION: This email originated from outside of the organization. Do not follow guidance, click links, or open attachments unless you recognize the sender and know the content is safe.
I'm also interested in this. As I know there is no native netflow input in syslog-ng and when I did some research on it, it is not very easy. Logstash has a native netflow input and output, but it seems this is abandoned and not very stable. nxLog also support netflow but I'm not sure if it is only in the enterprise version or it is available in the CE too
L:
On Wed, Nov 27, 2019 at 1:58 PM Raghunath Adhyapak <funduraghu@gmail.com <mailto:funduraghu@gmail.com>> wrote: Hi,
I was trying to receive Netflow logs from firewall devices in syslog-ng and then forward to a central server. Does syslog-ng support netflow such that I can validate and filter out all non-netflow log lines? I also dumped some netflow logs to a file and found it to be binary. Therefore I haven't been able to ascertain the format and filtering mechanism.
Any pointers on this topic would be helpful.
Thanks Raghu
______________________________________________________________________________ Member info: https://lists.balabit.hu/mailman/listinfo/syslog-ng<; https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.bala...
Documentation: http://www.balabit.com/support/documentation/?product=syslog-ng<; https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.balabit...
FAQ: http://www.balabit.com/wiki/syslog-ng-faq<; https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.balabit...
______________________________________________________________________________ Member info: https://lists.balabit.hu/mailman/listinfo/syslog-ng Documentation: http://www.balabit.com/support/documentation/?product=syslog-ng FAQ: http://www.balabit.com/wiki/syslog-ng-faq
Hi, The tcp destination uses RFC3164 protocol by default. https://tools.ietf.org/html/rfc3164#section-4.1 Best regards, Attila ________________________________ From: syslog-ng <syslog-ng-bounces@lists.balabit.hu> on behalf of Raghunath Adhyapak <funduraghu@gmail.com> Sent: Tuesday, December 3, 2019 2:07 PM To: Syslog-ng users' and developers' mailing list <syslog-ng@lists.balabit.hu> Subject: Re: [syslog-ng] Support for netflow logs CAUTION: This email originated from outside of the organization. Do not follow guidance, click links, or open attachments unless you recognize the sender and know the content is safe. Hi, I observe that timestamp and host is getting added to my netflow log before being forwarded even though I am using pure tcp driver for output and not syslog. Raghu On Mon, Dec 2, 2019, 20:49 Raghunath Adhyapak <funduraghu@gmail.com<mailto:funduraghu@gmail.com>> wrote: Thanks. On Mon, Dec 2, 2019, 18:02 Laszlo Szemere (lszemere) <Laszlo.Szemere@oneidentity.com<mailto:Laszlo.Szemere@oneidentity.com>> wrote: Hello Raghu, Netflow is indeed a binary protocol. Since Syslog-ng is a text based log management system, I think your only option is to find some kind of "gateway" for the Netflow traffic. The gateway should be able to receive and convert those packets into a text format. (At this point you will certainly loose some information, since not all network related bytes can be converted into a printable character. Or you should use some encoding on it.) This gateway might run as a stand alone application, or you can integrate it into Syslog-ng as a program (or python) source. Best regards, Laci ________________________________________ From: syslog-ng <syslog-ng-bounces@lists.balabit.hu<mailto:syslog-ng-bounces@lists.balabit.hu>> on behalf of Pal, Laszlo <vlad@vlad.hu<mailto:vlad@vlad.hu>> Sent: Wednesday, November 27, 2019 14:03 To: Syslog-ng users' and developers' mailing list Subject: Re: [syslog-ng] Support for netflow logs CAUTION: This email originated from outside of the organization. Do not follow guidance, click links, or open attachments unless you recognize the sender and know the content is safe. I'm also interested in this. As I know there is no native netflow input in syslog-ng and when I did some research on it, it is not very easy. Logstash has a native netflow input and output, but it seems this is abandoned and not very stable. nxLog also support netflow but I'm not sure if it is only in the enterprise version or it is available in the CE too L: On Wed, Nov 27, 2019 at 1:58 PM Raghunath Adhyapak <funduraghu@gmail.com<mailto:funduraghu@gmail.com><mailto:funduraghu@gmail.com<mailto:funduraghu@gmail.com>>> wrote: Hi, I was trying to receive Netflow logs from firewall devices in syslog-ng and then forward to a central server. Does syslog-ng support netflow such that I can validate and filter out all non-netflow log lines? I also dumped some netflow logs to a file and found it to be binary. Therefore I haven't been able to ascertain the format and filtering mechanism. Any pointers on this topic would be helpful. Thanks Raghu ______________________________________________________________________________ Member info: https://lists.balabit.hu/mailman/listinfo/syslog-ng<https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.balabit.hu%2Fmailman%2Flistinfo%2Fsyslog-ng&data=02%7C01%7CAttila.Szakacs%40oneidentity.com%7C4af1ec25c0f64ef2e54608d777f1cdbd%7C91c369b51c9e439c989c1867ec606603%7C0%7C0%7C637109752761327014&sdata=RfnhQwf76tknppvk5RWVvUGy%2BL15OtIzPGKiwcMrBvs%3D&reserved=0><https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.balabit.hu%2Fmailman%2Flistinfo%2Fsyslog-ng&data=02%7C01%7CLaszlo.Szemere%40oneidentity.com%7C8184443d85744e714f7f08d7733a477f%7C91c369b51c9e439c989c1867ec606603%7C0%7C0%7C637104566463198370&sdata=85l75FHhoJ7%2Fl%2FLPMhe8OuP6ZY00oRpgW38XZFcigeY%3D&reserved=0<https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.balabit.hu%2Fmailman%2Flistinfo%2Fsyslog-ng&data=02%7C01%7CAttila.Szakacs%40oneidentity.com%7C4af1ec25c0f64ef2e54608d777f1cdbd%7C91c369b51c9e439c989c1867ec606603%7C0%7C0%7C637109752761327014&sdata=RfnhQwf76tknppvk5RWVvUGy%2BL15OtIzPGKiwcMrBvs%3D&reserved=0>> Documentation: http://www.balabit.com/support/documentation/?product=syslog-ng<https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.balabit.com%2Fsupport%2Fdocumentation%2F%3Fproduct%3Dsyslog-ng&data=02%7C01%7CAttila.Szakacs%40oneidentity.com%7C4af1ec25c0f64ef2e54608d777f1cdbd%7C91c369b51c9e439c989c1867ec606603%7C0%7C0%7C637109752761337009&sdata=IkGk%2FeYDG1YVj0MXXz5OpED%2FK2WbRNB46FH6s7i9G5s%3D&reserved=0><https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.balabit.com%2Fsupport%2Fdocumentation%2F%3Fproduct%3Dsyslog-ng&data=02%7C01%7CLaszlo.Szemere%40oneidentity.com%7C8184443d85744e714f7f08d7733a477f%7C91c369b51c9e439c989c1867ec606603%7C0%7C0%7C637104566463208370&sdata=Dw5MDQ3N1r%2FZ1W9L3hoA%2FRq5I0qzKs16IFrwWEkwaGk%3D&reserved=0<https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.balabit.com%2Fsupport%2Fdocumentation%2F%3Fproduct%3Dsyslog-ng&data=02%7C01%7CAttila.Szakacs%40oneidentity.com%7C4af1ec25c0f64ef2e54608d777f1cdbd%7C91c369b51c9e439c989c1867ec606603%7C0%7C0%7C637109752761347003&sdata=SkqwXemh1nXMKQ7UeN8FdfgObCyl4jX%2FOvLvcfR3GYI%3D&reserved=0>> FAQ: http://www.balabit.com/wiki/syslog-ng-faq<https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.balabit.com%2Fwiki%2Fsyslog-ng-faq&data=02%7C01%7CAttila.Szakacs%40oneidentity.com%7C4af1ec25c0f64ef2e54608d777f1cdbd%7C91c369b51c9e439c989c1867ec606603%7C0%7C0%7C637109752761347003&sdata=gBu6ntJVMDzUFIomTQM86CAzk7SN5atwiSSWBqvFG%2Fo%3D&reserved=0><https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.balabit.com%2Fwiki%2Fsyslog-ng-faq&data=02%7C01%7CLaszlo.Szemere%40oneidentity.com%7C8184443d85744e714f7f08d7733a477f%7C91c369b51c9e439c989c1867ec606603%7C0%7C0%7C637104566463208370&sdata=nTLrYU59%2FG%2FRC6SxO83BWiBMb1qeHZ2z%2F%2FuEjJWddmo%3D&reserved=0<https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.balabit.com%2Fwiki%2Fsyslog-ng-faq&data=02%7C01%7CAttila.Szakacs%40oneidentity.com%7C4af1ec25c0f64ef2e54608d777f1cdbd%7C91c369b51c9e439c989c1867ec606603%7C0%7C0%7C637109752761357002&sdata=HDZsg6wF7%2BFtfDAnmAjkMZRYFY3kfPJF7fzS8HdnyyU%3D&reserved=0>> ______________________________________________________________________________ Member info: https://lists.balabit.hu/mailman/listinfo/syslog-ng<https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.balabit.hu%2Fmailman%2Flistinfo%2Fsyslog-ng&data=02%7C01%7CAttila.Szakacs%40oneidentity.com%7C4af1ec25c0f64ef2e54608d777f1cdbd%7C91c369b51c9e439c989c1867ec606603%7C0%7C0%7C637109752761367002&sdata=GT%2FO7sk1mPBq5PGF9tKpDGIKYpvw4DxMzd3kyG5cTc4%3D&reserved=0> Documentation: http://www.balabit.com/support/documentation/?product=syslog-ng<https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.balabit.com%2Fsupport%2Fdocumentation%2F%3Fproduct%3Dsyslog-ng&data=02%7C01%7CAttila.Szakacs%40oneidentity.com%7C4af1ec25c0f64ef2e54608d777f1cdbd%7C91c369b51c9e439c989c1867ec606603%7C0%7C0%7C637109752761367002&sdata=30ufxme6bpnW%2FcgefyU7ev4vlZG2euU7np8yOxIKMBQ%3D&reserved=0> FAQ: http://www.balabit.com/wiki/syslog-ng-faq<https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.balabit.com%2Fwiki%2Fsyslog-ng-faq&data=02%7C01%7CAttila.Szakacs%40oneidentity.com%7C4af1ec25c0f64ef2e54608d777f1cdbd%7C91c369b51c9e439c989c1867ec606603%7C0%7C0%7C637109752761376993&sdata=aZUEc6FiO8aGHByNCSkY4BQzpVWaVE6CiPnorO7VxPg%3D&reserved=0>
Thanks. Is there any way to disable this for tcp? I.e. just send the message as is Raghu On Tue, Dec 3, 2019, 19:37 Attila Szakacs (aszakacs) < Attila.Szakacs@oneidentity.com> wrote:
Hi,
The tcp destination uses RFC3164 protocol by default. https://tools.ietf.org/html/rfc3164#section-4.1
Best regards, Attila ------------------------------ *From:* syslog-ng <syslog-ng-bounces@lists.balabit.hu> on behalf of Raghunath Adhyapak <funduraghu@gmail.com> *Sent:* Tuesday, December 3, 2019 2:07 PM *To:* Syslog-ng users' and developers' mailing list < syslog-ng@lists.balabit.hu> *Subject:* Re: [syslog-ng] Support for netflow logs
CAUTION: This email originated from outside of the organization. Do not follow guidance, click links, or open attachments unless you recognize the sender and know the content is safe.
Hi,
I observe that timestamp and host is getting added to my netflow log before being forwarded even though I am using pure tcp driver for output and not syslog.
Raghu
On Mon, Dec 2, 2019, 20:49 Raghunath Adhyapak <funduraghu@gmail.com> wrote:
Thanks.
On Mon, Dec 2, 2019, 18:02 Laszlo Szemere (lszemere) < Laszlo.Szemere@oneidentity.com> wrote:
Hello Raghu, Netflow is indeed a binary protocol. Since Syslog-ng is a text based log management system, I think your only option is to find some kind of "gateway" for the Netflow traffic.
The gateway should be able to receive and convert those packets into a text format. (At this point you will certainly loose some information, since not all network related bytes can be converted into a printable character. Or you should use some encoding on it.) This gateway might run as a stand alone application, or you can integrate it into Syslog-ng as a program (or python) source.
Best regards, Laci
________________________________________ From: syslog-ng <syslog-ng-bounces@lists.balabit.hu> on behalf of Pal, Laszlo <vlad@vlad.hu> Sent: Wednesday, November 27, 2019 14:03 To: Syslog-ng users' and developers' mailing list Subject: Re: [syslog-ng] Support for netflow logs
CAUTION: This email originated from outside of the organization. Do not follow guidance, click links, or open attachments unless you recognize the sender and know the content is safe.
I'm also interested in this. As I know there is no native netflow input in syslog-ng and when I did some research on it, it is not very easy. Logstash has a native netflow input and output, but it seems this is abandoned and not very stable. nxLog also support netflow but I'm not sure if it is only in the enterprise version or it is available in the CE too
L:
On Wed, Nov 27, 2019 at 1:58 PM Raghunath Adhyapak <funduraghu@gmail.com <mailto:funduraghu@gmail.com>> wrote: Hi,
I was trying to receive Netflow logs from firewall devices in syslog-ng and then forward to a central server. Does syslog-ng support netflow such that I can validate and filter out all non-netflow log lines? I also dumped some netflow logs to a file and found it to be binary. Therefore I haven't been able to ascertain the format and filtering mechanism.
Any pointers on this topic would be helpful.
Thanks Raghu
______________________________________________________________________________ Member info: https://lists.balabit.hu/mailman/listinfo/syslog-ng <https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.balabit.hu%2Fmailman%2Flistinfo%2Fsyslog-ng&data=02%7C01%7CAttila.Szakacs%40oneidentity.com%7C4af1ec25c0f64ef2e54608d777f1cdbd%7C91c369b51c9e439c989c1867ec606603%7C0%7C0%7C637109752761327014&sdata=RfnhQwf76tknppvk5RWVvUGy%2BL15OtIzPGKiwcMrBvs%3D&reserved=0> < https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.bala... <https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.balabit.hu%2Fmailman%2Flistinfo%2Fsyslog-ng&data=02%7C01%7CAttila.Szakacs%40oneidentity.com%7C4af1ec25c0f64ef2e54608d777f1cdbd%7C91c369b51c9e439c989c1867ec606603%7C0%7C0%7C637109752761327014&sdata=RfnhQwf76tknppvk5RWVvUGy%2BL15OtIzPGKiwcMrBvs%3D&reserved=0>
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______________________________________________________________________________ Member info: https://lists.balabit.hu/mailman/listinfo/syslog-ng <https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.balabit.hu%2Fmailman%2Flistinfo%2Fsyslog-ng&data=02%7C01%7CAttila.Szakacs%40oneidentity.com%7C4af1ec25c0f64ef2e54608d777f1cdbd%7C91c369b51c9e439c989c1867ec606603%7C0%7C0%7C637109752761367002&sdata=GT%2FO7sk1mPBq5PGF9tKpDGIKYpvw4DxMzd3kyG5cTc4%3D&reserved=0> Documentation: http://www.balabit.com/support/documentation/?product=syslog-ng <https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.balabit.com%2Fsupport%2Fdocumentation%2F%3Fproduct%3Dsyslog-ng&data=02%7C01%7CAttila.Szakacs%40oneidentity.com%7C4af1ec25c0f64ef2e54608d777f1cdbd%7C91c369b51c9e439c989c1867ec606603%7C0%7C0%7C637109752761367002&sdata=30ufxme6bpnW%2FcgefyU7ev4vlZG2euU7np8yOxIKMBQ%3D&reserved=0> FAQ: http://www.balabit.com/wiki/syslog-ng-faq <https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.balabit.com%2Fwiki%2Fsyslog-ng-faq&data=02%7C01%7CAttila.Szakacs%40oneidentity.com%7C4af1ec25c0f64ef2e54608d777f1cdbd%7C91c369b51c9e439c989c1867ec606603%7C0%7C0%7C637109752761376993&sdata=aZUEc6FiO8aGHByNCSkY4BQzpVWaVE6CiPnorO7VxPg%3D&reserved=0>
Sure, add: ``` template("${MSG}\n") ``` to your tcp destination. Attila ________________________________ From: Raghunath Adhyapak <funduraghu@gmail.com> Sent: Tuesday, December 3, 2019 3:57 PM To: Attila Szakacs (aszakacs) <Attila.Szakacs@oneidentity.com> Cc: Syslog-ng users' and developers' mailing list <syslog-ng@lists.balabit.hu> Subject: Re: [syslog-ng] Support for netflow logs CAUTION: This email originated from outside of the organization. Do not follow guidance, click links, or open attachments unless you recognize the sender and know the content is safe. Thanks. Is there any way to disable this for tcp? I.e. just send the message as is Raghu On Tue, Dec 3, 2019, 19:37 Attila Szakacs (aszakacs) <Attila.Szakacs@oneidentity.com<mailto:Attila.Szakacs@oneidentity.com>> wrote: Hi, The tcp destination uses RFC3164 protocol by default. https://tools.ietf.org/html/rfc3164#section-4.1<https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Ftools.ietf.org%2Fhtml%2Frfc3164%23section-4.1&data=02%7C01%7CAttila.Szakacs%40oneidentity.com%7Cd3f9d5bba48a4e49893508d77801349c%7C91c369b51c9e439c989c1867ec606603%7C0%7C0%7C637109818889854254&sdata=c0lP%2FfiwO2HanijsV7DlTNu6wEm4Hf4%2BdzYKisXugE8%3D&reserved=0> Best regards, Attila ________________________________ From: syslog-ng <syslog-ng-bounces@lists.balabit.hu<mailto:syslog-ng-bounces@lists.balabit.hu>> on behalf of Raghunath Adhyapak <funduraghu@gmail.com<mailto:funduraghu@gmail.com>> Sent: Tuesday, December 3, 2019 2:07 PM To: Syslog-ng users' and developers' mailing list <syslog-ng@lists.balabit.hu<mailto:syslog-ng@lists.balabit.hu>> Subject: Re: [syslog-ng] Support for netflow logs CAUTION: This email originated from outside of the organization. Do not follow guidance, click links, or open attachments unless you recognize the sender and know the content is safe. Hi, I observe that timestamp and host is getting added to my netflow log before being forwarded even though I am using pure tcp driver for output and not syslog. Raghu On Mon, Dec 2, 2019, 20:49 Raghunath Adhyapak <funduraghu@gmail.com<mailto:funduraghu@gmail.com>> wrote: Thanks. On Mon, Dec 2, 2019, 18:02 Laszlo Szemere (lszemere) <Laszlo.Szemere@oneidentity.com<mailto:Laszlo.Szemere@oneidentity.com>> wrote: Hello Raghu, Netflow is indeed a binary protocol. Since Syslog-ng is a text based log management system, I think your only option is to find some kind of "gateway" for the Netflow traffic. The gateway should be able to receive and convert those packets into a text format. (At this point you will certainly loose some information, since not all network related bytes can be converted into a printable character. Or you should use some encoding on it.) This gateway might run as a stand alone application, or you can integrate it into Syslog-ng as a program (or python) source. Best regards, Laci ________________________________________ From: syslog-ng <syslog-ng-bounces@lists.balabit.hu<mailto:syslog-ng-bounces@lists.balabit.hu>> on behalf of Pal, Laszlo <vlad@vlad.hu<mailto:vlad@vlad.hu>> Sent: Wednesday, November 27, 2019 14:03 To: Syslog-ng users' and developers' mailing list Subject: Re: [syslog-ng] Support for netflow logs CAUTION: This email originated from outside of the organization. Do not follow guidance, click links, or open attachments unless you recognize the sender and know the content is safe. I'm also interested in this. As I know there is no native netflow input in syslog-ng and when I did some research on it, it is not very easy. Logstash has a native netflow input and output, but it seems this is abandoned and not very stable. nxLog also support netflow but I'm not sure if it is only in the enterprise version or it is available in the CE too L: On Wed, Nov 27, 2019 at 1:58 PM Raghunath Adhyapak <funduraghu@gmail.com<mailto:funduraghu@gmail.com><mailto:funduraghu@gmail.com<mailto:funduraghu@gmail.com>>> wrote: Hi, I was trying to receive Netflow logs from firewall devices in syslog-ng and then forward to a central server. Does syslog-ng support netflow such that I can validate and filter out all non-netflow log lines? I also dumped some netflow logs to a file and found it to be binary. Therefore I haven't been able to ascertain the format and filtering mechanism. Any pointers on this topic would be helpful. Thanks Raghu ______________________________________________________________________________ Member info: https://lists.balabit.hu/mailman/listinfo/syslog-ng<https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.balabit.hu%2Fmailman%2Flistinfo%2Fsyslog-ng&data=02%7C01%7CAttila.Szakacs%40oneidentity.com%7Cd3f9d5bba48a4e49893508d77801349c%7C91c369b51c9e439c989c1867ec606603%7C0%7C0%7C637109818889864249&sdata=LF0UOTlYNys8tuTyCp0di4XYNni5u1WzpxTvMz585M0%3D&reserved=0><https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.balabit.hu%2Fmailman%2Flistinfo%2Fsyslog-ng&data=02%7C01%7CLaszlo.Szemere%40oneidentity.com%7C8184443d85744e714f7f08d7733a477f%7C91c369b51c9e439c989c1867ec606603%7C0%7C0%7C637104566463198370&sdata=85l75FHhoJ7%2Fl%2FLPMhe8OuP6ZY00oRpgW38XZFcigeY%3D&reserved=0<https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.balabit.hu%2Fmailman%2Flistinfo%2Fsyslog-ng&data=02%7C01%7CAttila.Szakacs%40oneidentity.com%7Cd3f9d5bba48a4e49893508d77801349c%7C91c369b51c9e439c989c1867ec606603%7C0%7C0%7C637109818889864249&sdata=LF0UOTlYNys8tuTyCp0di4XYNni5u1WzpxTvMz585M0%3D&reserved=0>> Documentation: http://www.balabit.com/support/documentation/?product=syslog-ng<https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.balabit.com%2Fsupport%2Fdocumentation%2F%3Fproduct%3Dsyslog-ng&data=02%7C01%7CAttila.Szakacs%40oneidentity.com%7Cd3f9d5bba48a4e49893508d77801349c%7C91c369b51c9e439c989c1867ec606603%7C0%7C0%7C637109818889874238&sdata=I5vniEXioweiEUMmLetg9yzao%2Byzu2rt2gYxR36zh5M%3D&reserved=0><https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.balabit.com%2Fsupport%2Fdocumentation%2F%3Fproduct%3Dsyslog-ng&data=02%7C01%7CLaszlo.Szemere%40oneidentity.com%7C8184443d85744e714f7f08d7733a477f%7C91c369b51c9e439c989c1867ec606603%7C0%7C0%7C637104566463208370&sdata=Dw5MDQ3N1r%2FZ1W9L3hoA%2FRq5I0qzKs16IFrwWEkwaGk%3D&reserved=0<https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.balabit.com%2Fsupport%2Fdocumentation%2F%3Fproduct%3Dsyslog-ng&data=02%7C01%7CAttila.Szakacs%40oneidentity.com%7Cd3f9d5bba48a4e49893508d77801349c%7C91c369b51c9e439c989c1867ec606603%7C0%7C0%7C637109818889874238&sdata=I5vniEXioweiEUMmLetg9yzao%2Byzu2rt2gYxR36zh5M%3D&reserved=0>> FAQ: http://www.balabit.com/wiki/syslog-ng-faq<https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.balabit.com%2Fwiki%2Fsyslog-ng-faq&data=02%7C01%7CAttila.Szakacs%40oneidentity.com%7Cd3f9d5bba48a4e49893508d77801349c%7C91c369b51c9e439c989c1867ec606603%7C0%7C0%7C637109818889884239&sdata=5ktC%2FRoHwUs4jBTc0twdnjufZ%2FL%2BsPqH7ScIbmwwpDc%3D&reserved=0><https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.balabit.com%2Fwiki%2Fsyslog-ng-faq&data=02%7C01%7CLaszlo.Szemere%40oneidentity.com%7C8184443d85744e714f7f08d7733a477f%7C91c369b51c9e439c989c1867ec606603%7C0%7C0%7C637104566463208370&sdata=nTLrYU59%2FG%2FRC6SxO83BWiBMb1qeHZ2z%2F%2FuEjJWddmo%3D&reserved=0<https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.balabit.com%2Fwiki%2Fsyslog-ng-faq&data=02%7C01%7CAttila.Szakacs%40oneidentity.com%7Cd3f9d5bba48a4e49893508d77801349c%7C91c369b51c9e439c989c1867ec606603%7C0%7C0%7C637109818889884239&sdata=5ktC%2FRoHwUs4jBTc0twdnjufZ%2FL%2BsPqH7ScIbmwwpDc%3D&reserved=0>> ______________________________________________________________________________ Member info: https://lists.balabit.hu/mailman/listinfo/syslog-ng<https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.balabit.hu%2Fmailman%2Flistinfo%2Fsyslog-ng&data=02%7C01%7CAttila.Szakacs%40oneidentity.com%7Cd3f9d5bba48a4e49893508d77801349c%7C91c369b51c9e439c989c1867ec606603%7C0%7C0%7C637109818889894231&sdata=VDJacJLU8FnVKAXKPGJ2rnEjV4daPh2V%2FraLKiRsuPg%3D&reserved=0> Documentation: http://www.balabit.com/support/documentation/?product=syslog-ng<https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.balabit.com%2Fsupport%2Fdocumentation%2F%3Fproduct%3Dsyslog-ng&data=02%7C01%7CAttila.Szakacs%40oneidentity.com%7Cd3f9d5bba48a4e49893508d77801349c%7C91c369b51c9e439c989c1867ec606603%7C0%7C0%7C637109818889894231&sdata=s38pAFWFUM6x65QWNC%2Bhs2%2FKQlguLdXQehAhfflLXe8%3D&reserved=0> FAQ: http://www.balabit.com/wiki/syslog-ng-faq<https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.balabit.com%2Fwiki%2Fsyslog-ng-faq&data=02%7C01%7CAttila.Szakacs%40oneidentity.com%7Cd3f9d5bba48a4e49893508d77801349c%7C91c369b51c9e439c989c1867ec606603%7C0%7C0%7C637109818889904223&sdata=jqkQgI3DbmXlvqgcXjFBBh9F5kUQoMSlEiUWJ3bAY0Q%3D&reserved=0>
participants (4)
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Attila Szakacs (aszakacs)
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Laszlo Szemere (lszemere)
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Pal, Laszlo
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Raghunath Adhyapak