how to use regular expression with iptables
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I am trying to do a routing rule to a bunch a subdomains matched by regular expression.
iptables -t nat -A PREROUTING -m string --string "/must-[a-z0-9-.]+gonow[a-z.]+/g" --algo regex -p tcp -m tcp --dport 12 -j DNAT --to-destination 1.1.1.1:12
getting error - iptables: No chain/target/match by that name.
networking iptables regex
asked Jan 31 at 20:33
Vitalik Jimbei
1151312
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up vote
0
down vote
favorite
I am trying to do a routing rule to a bunch a subdomains matched by regular expression.
iptables -t nat -A PREROUTING -m string --string "/must-[a-z0-9-.]+gonow[a-z.]+/g" --algo regex -p tcp -m tcp --dport 12 -j DNAT --to-destination 1.1.1.1:12
getting error - iptables: No chain/target/match by that name.
networking iptables regex
asked Jan 31 at 20:33
Vitalik Jimbei
1151312
add a comment |Â
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I am trying to do a routing rule to a bunch a subdomains matched by regular expression.
iptables -t nat -A PREROUTING -m string --string "/must-[a-z0-9-.]+gonow[a-z.]+/g" --algo regex -p tcp -m tcp --dport 12 -j DNAT --to-destination 1.1.1.1:12
getting error - iptables: No chain/target/match by that name.
networking iptables regex
asked Jan 31 at 20:33
Vitalik Jimbei
1151312
I am trying to do a routing rule to a bunch a subdomains matched by regular expression.
iptables -t nat -A PREROUTING -m string --string "/must-[a-z0-9-.]+gonow[a-z.]+/g" --algo regex -p tcp -m tcp --dport 12 -j DNAT --to-destination 1.1.1.1:12
getting error - iptables: No chain/target/match by that name.
networking iptables regex
networking iptables regex
asked Jan 31 at 20:33
Vitalik Jimbei
1151312
asked Jan 31 at 20:33
Vitalik Jimbei
1151312
asked Jan 31 at 20:33
Vitalik Jimbei
1151312
asked Jan 31 at 20:33
Vitalik Jimbei
1151312
asked Jan 31 at 20:33
Vitalik Jimbei
1151312
1151312
add a comment |Â
add a comment |Â
1 Answer
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The problem is that you are attempting to use a relatively slow pattern matching algorithm in an application that MUST use a fast pattern matching algorithm. Also know that the entire use of the "string" filter can be compute intensive, and for that reason just a few years ago that module was not available by default. You will have to learn either the Boyer-Moore (bm) or Knuth-Pratt-Morris (kmp) fast string matching algorithms and use one of those.
See also the manual pages for iptables-extensions. Excerpt:
--algo bm
Select the pattern matching strategy. (bm = Boyer-Moore, kmp = Knuth-Pratt-Morris)
answered Jan 31 at 21:46
Doug Smythies
6,34631426
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
0
down vote
The problem is that you are attempting to use a relatively slow pattern matching algorithm in an application that MUST use a fast pattern matching algorithm. Also know that the entire use of the "string" filter can be compute intensive, and for that reason just a few years ago that module was not available by default. You will have to learn either the Boyer-Moore (bm) or Knuth-Pratt-Morris (kmp) fast string matching algorithms and use one of those.
See also the manual pages for iptables-extensions. Excerpt:
--algo bm
Select the pattern matching strategy. (bm = Boyer-Moore, kmp = Knuth-Pratt-Morris)
answered Jan 31 at 21:46
Doug Smythies
6,34631426
add a comment |Â
up vote
0
down vote
The problem is that you are attempting to use a relatively slow pattern matching algorithm in an application that MUST use a fast pattern matching algorithm. Also know that the entire use of the "string" filter can be compute intensive, and for that reason just a few years ago that module was not available by default. You will have to learn either the Boyer-Moore (bm) or Knuth-Pratt-Morris (kmp) fast string matching algorithms and use one of those.
See also the manual pages for iptables-extensions. Excerpt:
--algo bm
Select the pattern matching strategy. (bm = Boyer-Moore, kmp = Knuth-Pratt-Morris)
answered Jan 31 at 21:46
Doug Smythies
6,34631426
add a comment |Â
up vote
0
down vote
up vote
0
down vote
The problem is that you are attempting to use a relatively slow pattern matching algorithm in an application that MUST use a fast pattern matching algorithm. Also know that the entire use of the "string" filter can be compute intensive, and for that reason just a few years ago that module was not available by default. You will have to learn either the Boyer-Moore (bm) or Knuth-Pratt-Morris (kmp) fast string matching algorithms and use one of those.
See also the manual pages for iptables-extensions. Excerpt:
--algo bm
Select the pattern matching strategy. (bm = Boyer-Moore, kmp = Knuth-Pratt-Morris)
answered Jan 31 at 21:46
Doug Smythies
6,34631426
The problem is that you are attempting to use a relatively slow pattern matching algorithm in an application that MUST use a fast pattern matching algorithm. Also know that the entire use of the "string" filter can be compute intensive, and for that reason just a few years ago that module was not available by default. You will have to learn either the Boyer-Moore (bm) or Knuth-Pratt-Morris (kmp) fast string matching algorithms and use one of those.
See also the manual pages for iptables-extensions. Excerpt:
--algo bm
Select the pattern matching strategy. (bm = Boyer-Moore, kmp = Knuth-Pratt-Morris)
answered Jan 31 at 21:46
Doug Smythies
6,34631426
answered Jan 31 at 21:46
Doug Smythies
6,34631426
answered Jan 31 at 21:46
Doug Smythies
6,34631426
answered Jan 31 at 21:46
Doug Smythies
6,34631426
6,34631426
add a comment |Â
add a comment |Â
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