GET https://kbin.spritesserver.nl/index.php/m/linux@lemmy.ml/t/33295/Where-can-I-ask-questions-about-iproute2-tools/favourites

Response
200 OK
IP
216.73.216.34
Profiled on
Token
b7986c

Security

Token

There is no security token.

Firewall

main Name
Security enabled
Stateless

Configuration

Key Value
provider security.user.provider.concrete.app_user_provider
context main
entry_point App\Security\KbinAuthenticator
user_checker App\Security\UserChecker
access_denied_handler (none)
access_denied_url (none)
authenticators 
[
  "two_factor"
  "remember_me"
  "App\Security\KbinAuthenticator"
  "App\Security\FacebookAuthenticator"
  "App\Security\GoogleAuthenticator"
  "App\Security\GithubAuthenticator"
  "App\Security\KeycloakAuthenticator"
]

Listeners

Listener Duration Response 
Symfony\Component\Security\Http\Firewall\ChannelListener {#723
  -map: Symfony\Component\Security\Http\AccessMap {#722 …}
  -logger: Monolog\Logger {#783 …}
  -httpPort: 80
  -httpsPort: 443
}
 0.00 ms (none) 
Symfony\Component\Security\Http\Firewall\ContextListener {#706
  -tokenStorage: Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorage {#1017 …}
  -sessionKey: "_security_main"
  -logger: Monolog\Logger {#783 …}
  -userProviders: Symfony\Component\DependencyInjection\Argument\RewindableGenerator {#705 …}
  -dispatcher: Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher {#747 …}
  -registered: false
  -trustResolver: Scheb\TwoFactorBundle\Security\Authentication\AuthenticationTrustResolver {#780 …}
  -sessionTrackerEnabler: Symfony\Component\Security\Core\Authentication\Token\Storage\UsageTrackingTokenStorage::enableUsageTracking(): void {#703 …}
}
 15.86 ms (none) 
Symfony\Component\Security\Http\Firewall\AuthenticatorManagerListener {#584
  -authenticatorManager: Symfony\Component\Security\Http\Authentication\AuthenticatorManager {#595 …}
}
 0.00 ms (none) 
Scheb\TwoFactorBundle\Security\Http\Firewall\TwoFactorAccessListener {#582
  -twoFactorFirewallConfig: Scheb\TwoFactorBundle\Security\TwoFactor\TwoFactorFirewallConfig {#842 …}
  -tokenStorage: Symfony\Component\Security\Core\Authentication\Token\Storage\UsageTrackingTokenStorage {#1018 …}
  -twoFactorAccessDecider: Scheb\TwoFactorBundle\Security\Authorization\TwoFactorAccessDecider {#581 …}
}
 0.06 ms (none) 
Symfony\Component\Security\Http\Firewall\AccessListener {#579
  -tokenStorage: Symfony\Component\Security\Core\Authentication\Token\Storage\UsageTrackingTokenStorage {#1018 …}
  -accessDecisionManager: Symfony\Component\Security\Core\Authorization\TraceableAccessDecisionManager {#937 …}
  -map: Symfony\Component\Security\Http\AccessMap {#722 …}
}
 0.00 ms (none) 
Symfony\Component\Security\Http\Firewall\LogoutListener {#786
  -tokenStorage: Symfony\Component\Security\Core\Authentication\Token\Storage\UsageTrackingTokenStorage {#1018 …}
  -options: [
    "csrf_parameter" => "_csrf_token"
    "csrf_token_id" => "logout"
    "logout_path" => "app_logout"
  ]
  -httpUtils: Symfony\Component\Security\Http\HttpUtils {#841 …}
  -csrfTokenManager: Symfony\Component\Security\Csrf\CsrfTokenManager {#1015 …}
  -eventDispatcher: Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher {#747 …}
}
 0.00 ms (none)

Authenticators

No authenticators have been recorded. Check previous profiles on your authentication endpoint.

Access Decision

affirmative Strategy
# Voter class
1 
"Symfony\Component\Security\Core\Authorization\Voter\AuthenticatedVoter"
2 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
3 
"Symfony\Component\Security\Core\Authorization\Voter\RoleHierarchyVoter"
4 
"Symfony\Component\Security\Core\Authorization\Voter\ExpressionVoter"
5 
"App\Security\Voter\EntryCommentVoter"
6 
"App\Security\Voter\EntryVoter"
7 
"App\Security\Voter\MagazineVoter"
8 
"App\Security\Voter\MessageThreadVoter"
9 
"App\Security\Voter\MessageVoter"
10 
"App\Security\Voter\NotificationVoter"
11 
"App\Security\Voter\OAuth2UserConsentVoter"
12 
"App\Security\Voter\PostCommentVoter"
13 
"App\Security\Voter\PostVoter"
14 
"App\Security\Voter\UserVoter"

Access decision log

# Result Attributes Object
1 DENIED ROLE_USER 
null
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"Symfony\Component\Security\Core\Authorization\Voter\RoleHierarchyVoter"
 ACCESS DENIED 
"App\Security\Voter\EntryCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
2 DENIED moderate 
App\Entity\Entry {#1809
  +user: Proxies\__CG__\App\Entity\User {#1913 …}
  +magazine: App\Entity\Magazine {#315
    +icon: Proxies\__CG__\App\Entity\Image {#296 …}
    +name: "linux@lemmy.ml"
    +title: "linux"
    +description: """
      From Wikipedia, the free encyclopedia\n
      \n
      Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
      \n
      Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
      \n
      ### Rules\n
      \n
      - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
      - No misinformation\n
      - No NSFW content\n
      - No hate speech, bigotry, etc\n
      \n
      ### Related Communities\n
      \n
      - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
      - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
      - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
      - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
      \n
      Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
      """
    +rules: null
    +subscriptionsCount: 1
    +entryCount: 1406
    +entryCommentCount: 28632
    +postCount: 6
    +postCommentCount: 214
    +isAdult: false
    +customCss: null
    +lastActive: DateTime @1729583542 {#323
      date: 2024-10-22 09:52:22.0 +02:00
    }
    +markedForDeletionAt: null
    +tags: null
    +moderators: Doctrine\ORM\PersistentCollection {#287 …}
    +ownershipRequests: Doctrine\ORM\PersistentCollection {#283 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#272 …}
    +entries: Doctrine\ORM\PersistentCollection {#230 …}
    +posts: Doctrine\ORM\PersistentCollection {#188 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#250 …}
    +bans: Doctrine\ORM\PersistentCollection {#167 …}
    +reports: Doctrine\ORM\PersistentCollection {#153 …}
    +badges: Doctrine\ORM\PersistentCollection {#131 …}
    +logs: Doctrine\ORM\PersistentCollection {#121 …}
    +awards: Doctrine\ORM\PersistentCollection {#110 …}
    +categories: Doctrine\ORM\PersistentCollection {#97 …}
    -id: 73
    +apId: "linux@lemmy.ml"
    +apProfileId: "https://lemmy.ml/c/linux"
    +apPublicUrl: "https://lemmy.ml/c/linux"
    +apFollowersUrl: "https://lemmy.ml/c/linux/followers"
    +apInboxUrl: "https://lemmy.ml/inbox"
    +apDomain: "lemmy.ml"
    +apPreferredUsername: "linux"
    +apDiscoverable: true
    +apManuallyApprovesFollowers: null
    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1729583596 {#324
      date: 2024-10-22 09:53:16.0 +02:00
    }
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1698929468 {#318
      date: 2023-11-02 13:51:08.0 +01:00
    }
  }
  +image: null
  +domain: Proxies\__CG__\App\Entity\Domain {#1837 …}
  +slug: "Where-can-I-ask-questions-about-iproute2-tools"
  +title: "Where can I ask questions about iproute2 tools?"
  +url: null
  +body: """
    I have a very specific questions about Linux Traffic control and u32 filters in particular. However, I don’t know where the right place is to ask such a question as it’s fairly niche.\n
    \n
    The [Linux Advanced Routing & Traffic Control](https://lartc.org/) site says it has a mailing list for questions, but the last post was from 2019. There is also the incredibly busy [‘linux-netdev’ mailing list](https://marc.info/?l=linux-netdev), but, the traffic there looks like strictly source changes.\n
    \n
    Any ideas?\n
    \n
    **The question I’m trying to find an answer to is:** The u32 tc filter seems to support negative byte offsets which allows you to examine the Ethernet frame header (I don’t think I even found documentation on this, this is thanks to ChatGPT). However, when using u32 values to examine 8 bytes I can only use offsets in increments of 4 - like “at -8” or “at -12”, with any other increment giving me the error `Illegal “match”`.\n
    \n
    This seems like only a curiosity, but, I’ve been struggling to get my bit-matching to match the way I expect, and I’m wondering if this suggests that matching doesn’t function the way I think.
    """
  +type: "article"
  +lang: "en"
  +isOc: false
  +hasEmbed: false
  +commentCount: 4
  +favouriteCount: 26
  +score: 0
  +isAdult: false
  +sticky: false
  +lastActive: DateTime @1728989746 {#2435
    date: 2024-10-15 12:55:46.0 +02:00
  }
  +ip: null
  +adaAmount: 0
  +tags: null
  +mentions: null
  +comments: Doctrine\ORM\PersistentCollection {#2388 …}
  +votes: Doctrine\ORM\PersistentCollection {#1916 …}
  +reports: Doctrine\ORM\PersistentCollection {#1861 …}
  +favourites: Doctrine\ORM\PersistentCollection {#1950 …}
  +notifications: Doctrine\ORM\PersistentCollection {#1903 …}
  +badges: Doctrine\ORM\PersistentCollection {#1364 …}
  +children: []
  -id: 33295
  -titleTs: "'ask':4 'iproute2':7 'question':5 'tool':8"
  -bodyTs: "'-12':154 '-8':151 '/)':44 '/?l=linux-netdev),':74 '2019':60 '4':148 '8':138 'advanc':38 'allow':108 'also':63 'answer':94 'ask':27 'bit':180 'bit-match':179 'busi':66 'byte':105,139 'chang':83 'chatgpt':130 'control':10,41 'curios':170 'document':123 'doesn':197 'error':162 'ethernet':113 'even':121 'examin':111,137 'expect':187 'fair':34 'filter':13,100 'find':92 'found':122 'frame':114 'function':199 'get':177 'give':159 'header':115 'howev':16,131 'idea':85 'illeg':163 'incred':65 'increment':146,158 'know':20 'lartc.org':43 'lartc.org/)':42 'last':56 'like':80,149,167 'linux':8,37,68 'linux-netdev':67 'list':51,71 'look':79 'm':89,190 'mail':50,70 'marc.info':73 'marc.info/?l=linux-netdev),':72 'match':164,181,183,196 'negat':104 'netdev':69 'nich':35 'offset':106,144 'particular':15 'place':24 'post':57 'question':6,30,53,87 'right':23 'rout':39 'say':46 'seem':101,166 'site':45 'sourc':82 'specif':5 'strict':81 'struggl':175 'suggest':194 'support':103 'tc':99 'thank':128 'think':119,203 'traffic':9,40,77 'tri':90 'u32':12,98,134 'use':133,143 'valu':135 've':173 'way':185,201 'wonder':191"
  +cross: false
  +upVotes: 0
  +downVotes: 0
  +ranking: 1706380695
  +visibility: "visible             "
  +apId: "https://lemmy.ca/post/14107888"
  +editedAt: null
  +createdAt: DateTimeImmutable @1706296195 {#101
    date: 2024-01-26 20:09:55.0 +01:00
  }
}
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryVoter"
 ACCESS DENIED 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
3 DENIED edit 
App\Entity\Entry {#1809
  +user: Proxies\__CG__\App\Entity\User {#1913 …}
  +magazine: App\Entity\Magazine {#315
    +icon: Proxies\__CG__\App\Entity\Image {#296 …}
    +name: "linux@lemmy.ml"
    +title: "linux"
    +description: """
      From Wikipedia, the free encyclopedia\n
      \n
      Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
      \n
      Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
      \n
      ### Rules\n
      \n
      - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
      - No misinformation\n
      - No NSFW content\n
      - No hate speech, bigotry, etc\n
      \n
      ### Related Communities\n
      \n
      - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
      - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
      - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
      - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
      \n
      Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
      """
    +rules: null
    +subscriptionsCount: 1
    +entryCount: 1406
    +entryCommentCount: 28632
    +postCount: 6
    +postCommentCount: 214
    +isAdult: false
    +customCss: null
    +lastActive: DateTime @1729583542 {#323
      date: 2024-10-22 09:52:22.0 +02:00
    }
    +markedForDeletionAt: null
    +tags: null
    +moderators: Doctrine\ORM\PersistentCollection {#287 …}
    +ownershipRequests: Doctrine\ORM\PersistentCollection {#283 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#272 …}
    +entries: Doctrine\ORM\PersistentCollection {#230 …}
    +posts: Doctrine\ORM\PersistentCollection {#188 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#250 …}
    +bans: Doctrine\ORM\PersistentCollection {#167 …}
    +reports: Doctrine\ORM\PersistentCollection {#153 …}
    +badges: Doctrine\ORM\PersistentCollection {#131 …}
    +logs: Doctrine\ORM\PersistentCollection {#121 …}
    +awards: Doctrine\ORM\PersistentCollection {#110 …}
    +categories: Doctrine\ORM\PersistentCollection {#97 …}
    -id: 73
    +apId: "linux@lemmy.ml"
    +apProfileId: "https://lemmy.ml/c/linux"
    +apPublicUrl: "https://lemmy.ml/c/linux"
    +apFollowersUrl: "https://lemmy.ml/c/linux/followers"
    +apInboxUrl: "https://lemmy.ml/inbox"
    +apDomain: "lemmy.ml"
    +apPreferredUsername: "linux"
    +apDiscoverable: true
    +apManuallyApprovesFollowers: null
    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1729583596 {#324
      date: 2024-10-22 09:53:16.0 +02:00
    }
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1698929468 {#318
      date: 2023-11-02 13:51:08.0 +01:00
    }
  }
  +image: null
  +domain: Proxies\__CG__\App\Entity\Domain {#1837 …}
  +slug: "Where-can-I-ask-questions-about-iproute2-tools"
  +title: "Where can I ask questions about iproute2 tools?"
  +url: null
  +body: """
    I have a very specific questions about Linux Traffic control and u32 filters in particular. However, I don’t know where the right place is to ask such a question as it’s fairly niche.\n
    \n
    The [Linux Advanced Routing & Traffic Control](https://lartc.org/) site says it has a mailing list for questions, but the last post was from 2019. There is also the incredibly busy [‘linux-netdev’ mailing list](https://marc.info/?l=linux-netdev), but, the traffic there looks like strictly source changes.\n
    \n
    Any ideas?\n
    \n
    **The question I’m trying to find an answer to is:** The u32 tc filter seems to support negative byte offsets which allows you to examine the Ethernet frame header (I don’t think I even found documentation on this, this is thanks to ChatGPT). However, when using u32 values to examine 8 bytes I can only use offsets in increments of 4 - like “at -8” or “at -12”, with any other increment giving me the error `Illegal “match”`.\n
    \n
    This seems like only a curiosity, but, I’ve been struggling to get my bit-matching to match the way I expect, and I’m wondering if this suggests that matching doesn’t function the way I think.
    """
  +type: "article"
  +lang: "en"
  +isOc: false
  +hasEmbed: false
  +commentCount: 4
  +favouriteCount: 26
  +score: 0
  +isAdult: false
  +sticky: false
  +lastActive: DateTime @1728989746 {#2435
    date: 2024-10-15 12:55:46.0 +02:00
  }
  +ip: null
  +adaAmount: 0
  +tags: null
  +mentions: null
  +comments: Doctrine\ORM\PersistentCollection {#2388 …}
  +votes: Doctrine\ORM\PersistentCollection {#1916 …}
  +reports: Doctrine\ORM\PersistentCollection {#1861 …}
  +favourites: Doctrine\ORM\PersistentCollection {#1950 …}
  +notifications: Doctrine\ORM\PersistentCollection {#1903 …}
  +badges: Doctrine\ORM\PersistentCollection {#1364 …}
  +children: []
  -id: 33295
  -titleTs: "'ask':4 'iproute2':7 'question':5 'tool':8"
  -bodyTs: "'-12':154 '-8':151 '/)':44 '/?l=linux-netdev),':74 '2019':60 '4':148 '8':138 'advanc':38 'allow':108 'also':63 'answer':94 'ask':27 'bit':180 'bit-match':179 'busi':66 'byte':105,139 'chang':83 'chatgpt':130 'control':10,41 'curios':170 'document':123 'doesn':197 'error':162 'ethernet':113 'even':121 'examin':111,137 'expect':187 'fair':34 'filter':13,100 'find':92 'found':122 'frame':114 'function':199 'get':177 'give':159 'header':115 'howev':16,131 'idea':85 'illeg':163 'incred':65 'increment':146,158 'know':20 'lartc.org':43 'lartc.org/)':42 'last':56 'like':80,149,167 'linux':8,37,68 'linux-netdev':67 'list':51,71 'look':79 'm':89,190 'mail':50,70 'marc.info':73 'marc.info/?l=linux-netdev),':72 'match':164,181,183,196 'negat':104 'netdev':69 'nich':35 'offset':106,144 'particular':15 'place':24 'post':57 'question':6,30,53,87 'right':23 'rout':39 'say':46 'seem':101,166 'site':45 'sourc':82 'specif':5 'strict':81 'struggl':175 'suggest':194 'support':103 'tc':99 'thank':128 'think':119,203 'traffic':9,40,77 'tri':90 'u32':12,98,134 'use':133,143 'valu':135 've':173 'way':185,201 'wonder':191"
  +cross: false
  +upVotes: 0
  +downVotes: 0
  +ranking: 1706380695
  +visibility: "visible             "
  +apId: "https://lemmy.ca/post/14107888"
  +editedAt: null
  +createdAt: DateTimeImmutable @1706296195 {#101
    date: 2024-01-26 20:09:55.0 +01:00
  }
}
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryVoter"
 ACCESS DENIED 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
4 DENIED moderate 
App\Entity\Entry {#1809
  +user: Proxies\__CG__\App\Entity\User {#1913 …}
  +magazine: App\Entity\Magazine {#315
    +icon: Proxies\__CG__\App\Entity\Image {#296 …}
    +name: "linux@lemmy.ml"
    +title: "linux"
    +description: """
      From Wikipedia, the free encyclopedia\n
      \n
      Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
      \n
      Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
      \n
      ### Rules\n
      \n
      - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
      - No misinformation\n
      - No NSFW content\n
      - No hate speech, bigotry, etc\n
      \n
      ### Related Communities\n
      \n
      - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
      - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
      - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
      - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
      \n
      Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
      """
    +rules: null
    +subscriptionsCount: 1
    +entryCount: 1406
    +entryCommentCount: 28632
    +postCount: 6
    +postCommentCount: 214
    +isAdult: false
    +customCss: null
    +lastActive: DateTime @1729583542 {#323
      date: 2024-10-22 09:52:22.0 +02:00
    }
    +markedForDeletionAt: null
    +tags: null
    +moderators: Doctrine\ORM\PersistentCollection {#287 …}
    +ownershipRequests: Doctrine\ORM\PersistentCollection {#283 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#272 …}
    +entries: Doctrine\ORM\PersistentCollection {#230 …}
    +posts: Doctrine\ORM\PersistentCollection {#188 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#250 …}
    +bans: Doctrine\ORM\PersistentCollection {#167 …}
    +reports: Doctrine\ORM\PersistentCollection {#153 …}
    +badges: Doctrine\ORM\PersistentCollection {#131 …}
    +logs: Doctrine\ORM\PersistentCollection {#121 …}
    +awards: Doctrine\ORM\PersistentCollection {#110 …}
    +categories: Doctrine\ORM\PersistentCollection {#97 …}
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    I have a very specific questions about Linux Traffic control and u32 filters in particular. However, I don’t know where the right place is to ask such a question as it’s fairly niche.\n
    \n
    The [Linux Advanced Routing & Traffic Control](https://lartc.org/) site says it has a mailing list for questions, but the last post was from 2019. There is also the incredibly busy [‘linux-netdev’ mailing list](https://marc.info/?l=linux-netdev), but, the traffic there looks like strictly source changes.\n
    \n
    Any ideas?\n
    \n
    **The question I’m trying to find an answer to is:** The u32 tc filter seems to support negative byte offsets which allows you to examine the Ethernet frame header (I don’t think I even found documentation on this, this is thanks to ChatGPT). However, when using u32 values to examine 8 bytes I can only use offsets in increments of 4 - like “at -8” or “at -12”, with any other increment giving me the error `Illegal “match”`.\n
    \n
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    """
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App\Entity\Magazine {#315
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    From Wikipedia, the free encyclopedia\n
    \n
    Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
    \n
    Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
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    ### Rules\n
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    - No misinformation\n
    - No NSFW content\n
    - No hate speech, bigotry, etc\n
    \n
    ### Related Communities\n
    \n
    - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
    - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
    - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
    - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
    \n
    Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
    """
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