On 17.03.22 15:16, Knurpht-openSUSE wrote:

Op donderdag 17 maart 2022 15:08:28 CET schreef Patrick Shanahan:

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I need to escape the periods in some ip addresses.

I need xc=111.111.111.111 to become 111\\.111\\.111\\.111

sed appears (or not) to be the proper utility but I cannot get the correct syntax.

tks

IP=111.111.111.111 xc=`echo "${IP//./}" `

ITYM ${IP//./\\\\.} and ... no need for the echo: IP=${IP//./\\\\.} Josef -- SUSE Software Solutions Germany GmbH Maxfeldstr. 5 90409 Nürnberg Germany (HRB 36809, AG Nürnberg) Geschäftsführer: Ivo Totev

* Per Jessen [03-17-22 10:20]:

Patrick Shanahan wrote:

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I need to escape the periods in some ip addresses.

I need xc=111.111.111.111 to become 111\\.111\\.111\\.111

sed appears (or not) to be the proper utility but I cannot get the correct syntax.

In which context, Patrick? there are places where you need three backslashes, even four.

grep from bash control line grep 111\\.111\\.111\\.111 tks -- (paka)Patrick Shanahan Plainfield, Indiana, USA @ptilopteri http://en.opensuse.org openSUSE Community Member facebook/ptilopteri Photos: http://wahoo.no-ip.org/piwigo paka @ IRCnet oftc What sort of day was it? A day like all days, filled with those events that alter and illuminate our times...

* Per Jessen [03-17-22 13:00]:

Patrick Shanahan wrote:

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* Per Jessen [03-17-22 10:20]:

...

Patrick Shanahan wrote:

...

I need to escape the periods in some ip addresses.

I need xc=111.111.111.111 to become 111\\.111\\.111\\.111

sed appears (or not) to be the proper utility but I cannot get the correct syntax.

In which context, Patrick? there are places where you need three backslashes, even four.

grep from bash control line grep 111\\.111\\.111\\.111

tks

Two options -

a) put the regex in quotes, then you need only one backslash. b) without qoutes, you need three backslashes.

I have presented, IP=${IP//./\\\\.} which works perfectly, but I didn't explain sufficiently to you my requirement. I need to grep $IP a file containing ip addresses and need to ensure the dots appear in the correct location as: grep 111.11.111.1 will match 111.1.1.1 without escaping the dot position this all but solves my need. I would also like to be able to drop the 4th quad and/or the 3rd and 4th. Is that also possible? I am trying to automagic blocking errant ip's using ipset and logs of sites trying to relay mail or gain unpermitted system access. I currently have a list of >10000 sites or ranges of sites blocked using above criteria. built over some years. and I realize that many are blocking ip4 sites that change address occasionally. ps: since some years ago moving ssh to a high port, I have a very low count of ssh attempts. -- (paka)Patrick Shanahan Plainfield, Indiana, USA @ptilopteri http://en.opensuse.org openSUSE Community Member facebook/ptilopteri Photos: http://wahoo.no-ip.org/piwigo paka @ IRCnet oftc What sort of day was it? A day like all days, filled with those events that alter and illuminate our times...

* Bengt Gördén [03-17-22 13:57]:

On 2022-03-17 18:11, Patrick Shanahan wrote:

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this all but solves my need. I would also like to be able to drop the 4th quad and/or the 3rd and 4th.

I use this: $ cat ~/script/grepipnumber

#!/bin/sh

grep -E -o "(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)"

...

Is that also possible?

Absolutely $ echo 1.1.1.1 | grepipnumber | awk -F. '{print $1"."$2}' 1.1

Often I need to append the net-part. Like so.

$ echo 1.1.1.1 | grepipnumber | awk -F. '{print $1"."$2"."$3".0/24"}' 1.1.1.0/24

tks, when I get matches for the first three quads, I ban 0/24. and from china for any I ban $1.$2.0/16 I figure legitimate china attempts will be via VPN. -- (paka)Patrick Shanahan Plainfield, Indiana, USA @ptilopteri http://en.opensuse.org openSUSE Community Member facebook/ptilopteri Photos: http://wahoo.no-ip.org/piwigo paka @ IRCnet oftc What sort of day was it? A day like all days, filled with those events that alter and illuminate our times...

* Bernhard Voelker [03-17-22 20:03]:

On 3/17/22 17:46, Patrick Shanahan wrote:

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* Per Jessen [03-17-22 10:20]:

...

Patrick Shanahan wrote:

...

I need to escape the periods in some ip addresses.

I need xc=111.111.111.111 to become 111\\.111\\.111\\.111

sed appears (or not) to be the proper utility but I cannot get the correct syntax.

In which context, Patrick? there are places where you need three backslashes, even four.

grep from bash control line grep 111\\.111\\.111\\.111

Another way: use `grep -F`:

-F, --fixed-strings PATTERNS are strings

(no need to escape the '.' in fixed strings)

a *better* solution, tks -- (paka)Patrick Shanahan Plainfield, Indiana, USA @ptilopteri http://en.opensuse.org openSUSE Community Member facebook/ptilopteri Photos: http://wahoo.no-ip.org/piwigo paka @ IRCnet oftc What sort of day was it? A day like all days, filled with those events that alter and illuminate our times...